405 FXUS66 KSEW 042134 AFDSEW Area Forecast Discussion National Weather Service Seattle WA 234 PM PDT Thu Jun 4 2026 .SYNOPSIS... Low pressure will drop out of the Gulf of Alaska tomorrow, remaining offshore but generating potential for rain and thunderstorms. The threat for thunderstorms expands on Saturday as the low moves overhead and provides supportive upper level dynamics. Cooler, cloudy, and at times showery weather will persist into early next week before conditions begin to warm up and dry out. && .SHORT TERM /TONIGHT THROUGH SATURDAY NIGHT/... Mostly cloudy across western Washington this afternoon with highs so far in the mid 60s. Overnight into tomorrow, a deep area of low pressure will move offshore out of the Gulf of Alaska, sending a shortwave into the region. This will be the driver of another round of showers and a few thunderstorms. Tomorrow, the thunderstorm threat will be most likely within the Olympic mountains and in areas of the north interior including the North Cascades. Probabilities of thunderstorms range from 15% to 25% in these areas. The primary hazards will be lightning, gusty and erratic winds, and periods of heavy rain within the storms. The aforementioned low pressure moves in directly overhead on Saturday, providing supportive mid and upper level dynamics for an expanded thunderstorm threat. Most unstable CAPE ranges from 300-400 J/kg, 0-6km lapse rates between 6-7 C/km, cold mid levels, and easily achievable convective temperatures. Most of the area, with the exception of the immediate coast and areas north of Skagit County have around a 20-30% chance of seeing a few thunderstorms throughout the day. The timing of thunderstorm development and activity will largely be between 11AM and 7PM local time. Please use caution when recreating and/or working outside and remember to head indoors when thunder roars. && .LONG TERM /SUNDAY THROUGH THURSDAY/... Low pressure exits the region Saturday night, leaving Sunday in more of a transitional pattern. Transient and weak high pressure will fill in, only temporarily. Temperatures will be in the mid 60s, up a few degrees from Saturday. The bulk of the day should remain cloudy, with chances for light showers arriving late in the afternoon. Another round of low pressure arrives Monday for more scattered showers and a slight chance of coastal thunderstorms. This unsettled and cooler pattern lingers into Wednesday before there is any indication of things warming and drying. Temperatures warm slightly back into the low 70s by Thursday. The latest 8-14 day outlook from the CPC shows increased confidence in above normal temperatures and below average precipitation beginning late next week and heading into the middle of the month. 21 && .AVIATION... Westerly flow aloft will become southwesterly tonight as an upper trough situated west of Haida Gwaii pushes a frontal system into the region on Friday. Low level onshore flow is easing with VFR expected for most areas into this evening. Ceilings will lower to MVFR along the coast late tonight in increasing shower activity associated with an incoming trough. These conditions will spread to interior areas late Friday morning through the remainder of the day. The air mass will become weakly unstable by Friday afternoon for isolated thunderstorm activity. KSEA...VFR conditions will continue into tonight. There`s a less than 20% chance of MVFR ceilings early Friday with ceilings more likely to lower after 18Z-20Z as shower activity ramps up with the next frontal system. Surface winds will veer northwesterly 5 to 8 knots for a few hours late this afternoon and early evening before backing southerly again overnight and rising to 9 to 14 knots Friday AM. 27 && .MARINE... Onshore flow will ease today as a weak surface ridge shifts inland and a broad surface low drops southward in the offshore and coastal waters. A weak front will cross the waters midday Friday into Friday afternoon. A vertically stacked trough trailing the front will move onshore during the day on Saturday with relatively little impact in terms of wind. A weak surface ridge will cross the waters Saturday night into Sunday before another frontal system reaches the area Sunday night and Monday with potential headlines for the coastal waters. Coastal seas look to remain below 10 feet through the period. 27 && .FIRE WEATHER... Onshore flow has been beneficial to most areas of western Washington, yet afternoon RH values are still only in the 40% range for areas from Seattle south. The ERCs will respond to the increase in moisture over the next several days, especially in the fine fuels. Friday and Saturday will feature area wide chances for thunderstorms, but indications are looking more favorable for them containing adequate QPF. The pattern turns warmer and drier toward the end of next week, lasting beyond the middle of the month, so fire weather conditions will continue to be evaluated as that pattern evolves. 21 && .SEW WATCHES/WARNINGS/ADVISORIES... WA...None. PZ...Small Craft Advisory until 11 PM PDT this evening for Central U.S. Waters Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca. && $$

661 FXUS66 KPQR 042217 AFDPQR Area Forecast Discussion National Weather Service Portland OR 317 PM PDT Thu Jun 4 2026 .SYNOPSIS...Dry and warm weather this afternoon. A deeper trough shifts southward into the region Friday to Saturday increasing onshore flow and returning chances for precipitation. Slight chances for thunderstorms Friday and Saturday afternoon. Drier weather returns Sunday before another trough returns chances for precipitation early to mid next week. && .SHORT TERM...Today through Saturday night...Satellite imagery as of early Thursday afternoon depicts decreasing clouds with mostly sunny skies as dry westerly flow sets up over the region. Onshore flow is also increasing - while winds are generally light throughout most areas, increasing KTTD-KDLS pressure gradients of +2.5 to +3.5 will lead to breezy westerly winds with gusts up to 30 mph through the central Columbia River Gorge and Upper Hood River Valley this afternoon and evening. The overall forecast on Friday and Saturday has remained unchanged and models are in good agreement in the synoptic pattern. On Friday, a cooler and wetter pattern returns as a deeper trough drops approaches the Pacific Northwest from the Gulf of Alaska. As this upper trough moves in, it will push a weak front into northwest Oregon and southwest Washington. This will return chances for precipitation over southwest Washington and the north Oregon coast, Coast Range, and Cascades, while most interior valleys remain dry. Given the showery nature of this system, rainfall amounts will vary across the area and the highest amounts will ultimately depend on where showers set-up. Overall, showers will be non-impactful. In addition, there is a 10-15% chance for isolated thunderstorms across southwest Washington Friday afternoon due to increasing instability from cold air aloft along with sufficient lift from the trough. On Saturday, the aforementioned upper trough will move south and inland over the Pacific Northwest, bringing more widespread chances for rain across northwest Oregon and southwest Washington. At the same time, cooling temperatures aloft will further increase instability with CAPE values as high as 150-200 J/kg. This plus higher 500 mb vorticity will lead to a 15-25% chance for thunderstorms Saturday, mainly from Pacific City and Salem northward with the highest chances (20-25%) across southwest Washington. The highest threat for thunderstorms appears to be in the late morning to afternoon (11 AM-5 PM Saturday) when instability is the greatest. Any passing thunderstorms Friday and Saturday afternoon may produce lightning, brief heavy rain, erratic winds, and/or small hail. Onshore flow will also increase Friday to Saturday as this upper trough moves in. West-southwesterly winds won`t be too impactful across most areas with gusts up to 20 mph along the I-5 corridor, however, typical breezy spots during onshore flow like the central Gorge and Upper Hood River Valley could gust up to 35 mph. There is also a 20-30% chance for isolated wind gusts of 40-45 mph through these areas as well, with higher chances (30-50%) for higher terrain and exposed ridgetops. If the low shifts any further north, these winds would end up weaker. -10 && .LONG TERM...Sunday through Wednesday...For those with Sunday plans, drier weather briefly returns on Sunday as a shortwave ridge passes over the Pacific Northwest. By Monday, the vast majority of ensemble members are showing broad troughing and below-average 500 mb heights returning to the area. While this would return widespread chances for precipitation and cooler temperatures, there still remains uncertainty on the exact magnitude and track of this trough. Uncertainty follows on Tuesday to Wednesday with exactly how this trough progresses through the area, but most ensemble members (65%) keeps some sort of troughing moving through the Pacific Northwest, maintaining a cooler and wetter pattern. However, the other 35% of ensemble members show the trough either swinging southward into California or the trough exiting eastward with high pressure re-building. If this were to occur, then we`d end up drier. By Wednesday, there is greater uncertainty as ensemble guidance is half and half on whether or not troughing lingering overhead or exits the area. It appears models are most uncertain with the exact timing/duration of this trough. Either way, any precipitation that falls will likely be light and non-impactful. Chances for exceeding 1 inch of liquid precipitation in 48 hours between 5 AM Tuesday to 5 AM Thursday are only 15-20% west of the Cascades, and around 35-45% across the Cascades. -10 && .AVIATION...Light north to northwest winds around 5-10 kt will continue through 06Z Friday as onshore flow continues. Satellite and surface weather observations at 21Z Thursday showed mostly clear skies from KONP to KSLE to KEUG, with scattered clouds north of KSLE with ceilings above 4000 ft. A broken or overcast VFR cloud deck will likely redevelop around and after 06Z Friday along the Cascade foothills and Willamette Valley with ceilings most likely staying above 4000 ft. Periods of MVFR ceilings are most likely to occur along the coast between 06-18Z Friday. This is also when a weak front will begin moving inland from the coastal waters, which will bring scattered light rain showers to the coast by approximately 12Z Friday. This front will also bring a shift to southwesterly surface winds by 18Z Friday. KPDX AND APPROACHES...VFR ceilings are expected to continue through 00Z Saturday along with dry conditions. Northwest winds will continue around 5-10 kt through this evening, with gusts as high as 15-18 kt towards 01-02Z Friday. Winds become light and variable again tonight. -23 && .MARINE...Looking at fairly benign conditions over the next several days despite a series of frontal systems moving through. Westerly flow will continue through Saturday. Seas are expected to remain around 5 to 6 ft as a westerly swell persists. Seas then build to 6-8 ft at 11 to 12 seconds late tonight into Friday morning as a weak frontal boundary approaches the waters. This front will also bring increasing southwesterly to westerly winds with gusts up to 15-20 kt. There is less than a 5-10% chance of wind gusts of 25 kt or greater. A secondary front arrives on Saturday, bringing a shift to northwest winds in the afternoon. Wind speeds are not expected to increase much with this frontal passage, as there is less than a 15-30% chance of Small Craft Advisory wind gusts. The time period with highest wind speeds will likely occur on Monday as a stronger system moves over the waters, bringing south winds up to 20-25 kt and seas approaching 8-9 ft. -23 && .PQR WATCHES/WARNINGS/ADVISORIES... OR...None. WA...None. PZ...None. && $$ www.weather.gov/portland Interact with us via social media: www.facebook.com/NWSPortland x.com/NWSPortland

404 FXUS66 KMFR 041927 AFDMFR Area Forecast Discussion National Weather Service Medford OR 1227 PM PDT Thu Jun 4 2026 .DISCUSSION...After a substantial marine push this morning that filled nearly all of the West Side valleys with low clouds and fog, the skies have mostly cleared with plenty of sunshine now over southern Oregon and far northern California. Today and tomorrow (Friday), with upper level flow in a near zonal to very low amplitude ridging pattern, daytime highs will be very near to just slightly above normal for early June, with the typical breezes in the afternoon. Cloud cover increases tomorrow afternoon as the next upper level trough, currently sitting just offshore of British Columbia, approaches the region. The trough will dig farther into the Pacific Northwest Saturday, and while the center of low itself passes over Washington, the trough axis will swing over our area late Friday into Saturday, bringing another round of afternoon gusty winds both days (remaining well below any thresholds), and a slight chance for light showers over northern Coos and Douglas counties, and maybe some drizzle along the rest of the coast, on Saturday. Areas in Modoc, Lake, and Klamath counties will be under frost/freeze concerns again Saturday night, with overnight lows potentially dropping below freezing in northern Klamath and Lake counties. Overall, temperatures Saturday will be 5 to 10 degrees below normal. Once the trough departs to the east, seasonal warmth returns under shortwave ridging Sunday, then another trough arrives late Monday into Tuesday. The nature of this trough varies greatly across the model suites in both timing and track, with some passing the center of a closed low over Washington then into the northern Rockies, and others digging farther south to bring the low over Central California and the Great Basin. Both will result in somewhat cool temperatures, but will vary greatly in precipitation chances and nature: the northerly track trending more towards light shower chances, while a southerly track leads to much higher shower chances along with potential thunderstorms. && .AVIATION (18Z TAFs)... Satellite imagery indicates low clouds over the Umpqua basin which is impacting KRBG with MVFR ceilings. Expecting this deck to clear out with afternoon mixing. Thereafter, this should be mostly a VFR TAF cycle as the afternoon brings decent mixing and breezy wind speeds today. These will be diurnally driven with speeds diminishing around sunset. Expecting a marine layer tonight that could bring MVFR conditions (~40%) along/near the coast impacting KOTH. && .MARINE...Updated 1200 PM PDT Thursday, June 4, 2026...North winds are increasing today as a thermal trough develops along the coast. By late this evening, gusty winds and steep wind-driven seas will cover all but the most sheltered waters south of Cape Blanco. Conditions will improve briefly Friday, then north winds and steep wind driven seas return Saturday afternoon into Sunday morning. South winds will accompany a front on Monday, but otherwise conditions should be relatively calm early next week. && .MFR WATCHES/WARNINGS/ADVISORIES... OR...CA...None. PACIFIC COASTAL WATERS...Small Craft Advisory until 8 AM PDT Friday for PZZ356-376. && $$

971 FXUS66 KEKA 042157 AFDEKA AREA FORECAST DISCUSSION National Weather Service Eureka CA 257 PM PDT Thu Jun 4 2026 .SYNOPSIS...Dry weather along with near-normal temperatures are expected through the weekend. Breezy winds expand to the interior Friday through the weekend with low relative humidities bringing a fire weather threat. Light rain is possible for the North Coast Monday. && .KEY MESSAGES... - Near normal temperatures and dry weather expected through the weekend. - Widespread breezy to gusty winds each afternoon and evening Friday and through the weekend, with low RH values promoting locally elevated fire conditions across the interior. - Chance for light rain for the North Coast Monday. && .DISCUSSION...An upper-level trough will drive southward Friday and through the weekend, which is expected to cool temperatures 5 to 10 degrees. An associated weak cold front will track southward across the CWA on Friday, promoting widespread breezy west- northwest winds. Breezy conditions will prevail through the weekend, with the strongest winds over the coastal headlands and exposed ridges. Generally gusts from 25 to 35 mph are expected, with locally higher gusts. There is a 60-90% chances for gusts greater than 35 mph over the coastal headlands and higher terrain. Even lower elevations of Lake County could see gusts of up to 30 mph, and with low afternoon relative humidities, elevated fire weather conditions are expected. See the fire weather section for more details. Ensemble clusters suggest a troughing pattern over the area through mid-next week. Precipitation chances (15-30%) of light rain return on Monday and gradually diminish on Tuesday. The highest chances for rain are for coastal Humboldt and Del Norte, but some sprinkles are possible for much of northwest California. Uncertainty remain high regarding to the amounts of precipitation over the area for this system. /ZVS/JB && .AVIATION...Marine layers clouds have nearly dissipated as of this writing as northerly flow mixes in dry air across the region. Wind gusts in excess of 25 kt will be possible at the coastal terminals through the early evening with a very tight pressure gradient over the coastal waters. A trough approaching the Pacific Northwest will begin to weaken the pressure gradient overnight into Friday allowing the north winds to weaken. Thus, less gusty conditions are likely Friday afternoon. This may also allow the coastal clouds to be a little more persistent Friday in the Humboldt Bay area. RPA && .MARINE...North winds are currently moderate to strong over the coastal waters with near-gale to gale force winds expected south of Cape Mendocino. Steep wind waves of 10 to 12 ft are possible south of the Cape, even nearshore. Farther north seas will be a little smaller where the upwind fetch is shorter. Overnight into Friday the winds will gradually decrease and seas will subside as a trough approaches the Pacific Northwest causing the pressure gradient to weaken. This trough will move past the West Coast over the weekend only to be reinforced by another trough early next week. This will cause winds to continue to weaken and potentially briefly turn out of the south Monday. Overall, this will cause improved conditions and much lower seas early next week. RPA && .FIRE WEATHER...Gusty west-northwest winds are expected in interior areas each afternoon from Friday through Sunday. These winds combined with low afternoon relative humidities will promote elevated fire weather conditions. While the strongest winds are expected in the ridges where afternoon gusts could peak over 30 mph, lower elevations could see gusts of 20 to 30 mph each afternoon. In the eastern portions of the area (Trinity, eastern Mendocino, and Lake Counties), afternoon relative humidities are expected to drop into the low to mid 20s Friday afternoon. Terrain channeling in Lake County, especially, will bring locally critical fire weather conditions Friday afternoon and evening. Cooler temperatures, slightly higher relative humidity, and slightly lighter winds are expected Saturday and Sunday afternoons, but still an elevated fire weather threat is expected. Light rain is possible Monday and Tuesday of next week. /JB/ZVS && .EKA WATCHES/WARNINGS/ADVISORIES... CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until noon PDT Friday for PZZ450. Gale Warning until 6 AM PDT Friday for PZZ455. Small Craft Advisory until 3 PM PDT Friday for PZZ470. Gale Warning until 3 PM PDT Friday for PZZ475. && $$ NOTE: The full forecast discussion is now regularly issued between 10 am/pm and 1 pm/am. Additional updates will be issued as needed. Visit us at https://www.weather.gov/eureka Follow us on Facebook and Twitter at: https://www.facebook.com/NWSEureka https://www.twitter.com/NWSEureka For forecast zone information see the forecast zone map online: https://www.weather.gov/images/eka/zonemap.png

374 FXUS66 KMTR 042144 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 244 PM PDT Thu Jun 4 2026 ...New MARINE, BEACHES... .KEY MESSAGES... Updated at 125 PM PDT Thu Jun 4 2026 - Breezy to gusty onshore winds mainly in the afternoon and evening - Mild to hot conditions Friday afternoon across the interior - Notable cool down for the weekend through the middle of next week - Hazardous beach conditions Thursday night through Saturday morning && .SHORT TERM... Issued at 125 PM PDT Thu Jun 4 2026 (This evening through Friday) Another afternoon of abundant sunshine across the Bay Area and Central Coast. The one exception to that statement is the Monterey Peninsula where low stratus continues to bump up against the terrain. Yesterday afternoon ended up being rather windy across the region. Today is less windy across the interior, but onshore flow is still occuring. KSFO is registering wind gusts of 25 kt this afternoon. Peeking at the 24 hour trend shows coastal areas are generally cooler while far interior are warmer, clear sign of onshore flow. Tonight: Another night with a partial mixed marine layer. Hi-res guidance paints a picture of patchy stratus along the coast and locally inland with the biggest coverage over the Monterey Bay region. Almost a repeat of this morning. Friday: Onshore flow remains with breezy afternoon seabreeze push. Outside of the marine influence temperatures will warm into the 80s and 90s again. Friday will end of being the warmest day of the bunch, but relief at night and onshore flow will keep HeatRisk values in check. Only the far interior locations reach the Moderate category. && .LONG TERM... Issued at 150 PM PDT Thu Jun 4 2026 (Friday night through next Wednesday) We`ve been talking about an upstream upper low and associated trough bringing a noticeable cooldown over the weekend and that is still on track. A system currently near the Gulf of AK will move eastward bring lower H5 and colder 850mb temp dropping temperatures below seasonal levels Saturday and Sunday. Highs will 60s/mid 70s coast/bays and 70s to mid 80s interior. The dropping heights will help to bring a more defined marine layer with night/morning clouds too. Lastly, the cold advection aloft will bring a solid push of onshore flow with gusty winds along the coast and inland valleys/gaps/passes Saturday afternoon. Early next week we get another secondary trailing system. Global models are struggling with the trailing system with some keeping the low way north and others dropping it over CA. Clusters also reflects the uncertainty with more members leaning toward a more southerly push. As such, we still have a mention of showers in the region Monday into Tuesday. Chances are highest over the waters/coast/Bay Area northward. Even if showers develop not expecting much in the way of precip totals. Warmer and drier conditions develop by Wednesday and Thursday. && .AVIATION... (18Z TAFS) Issued at 1147 AM PDT Thu Jun 4 2026 Widespread VFR conditions as the last bit of stratus clears from the coastline. Clear skies and gentle to moderate breezes (generally from the west but locally driven) dominate the TAF period, with a couple of sites experiencing strong gusts in excess of 20kts. Coastal sites will see another round of stratus coverage tonight with IFR-MVFR ceilings. Currently, there is low confidence on how widespread stratus will be at HAF so, decided to leave it as FEW- SCT015 beginning tonight ~10pm PDT. The low to mid level airmass off the coast remains dry with satellite currently showing a wide gap in cloud coverage to the west. Vicinity of SFO...VFR through the TAF period. Westerly winds pick up to moderate strength by the early afternoon. Gusts in excess of 20kts will also begin by then and persist until ~9pm PDT. Winds diminish to gentle breezes overnight into Friday morning, though they are expected to increase again to moderate strength by early Friday afternoon. SFO Bridge Approach...NW to W moderate winds with strong gusts similar to that of SFO prevail into the evening. Winds diminish to a light breeze (~6kts) a bit earlier than SFO and become variable overnight. Aligns with SFO again by late Friday morning. Monterey Bay Terminals...VFR through the afternoon until the stratus deck returns again this evening. The marine layer will become ~1000 feet deep overnight which will bring borderline IFR-LIFR ceilings at MRY around 9pm PDT and IFR ceilings at SNS around midnight. MVFR ceilings are expected by Friday morning at both terminals as the marine layer begins to erode. Onshore gentle breezes will prevail through the TAF period. && .MARINE... (Tonight through next Tuesday) Issued at 242 PM PDT Thu Jun 4 2026 Hazardous conditions for small craft continue through the weekend. Gale force gusts are expected across the outer waters and along the coastal jet regions. Moderate to rough seas will continue to build through Friday to become rough to very rough for the inner and outer waters through the weekend. Conditions will gradually begin to improve Monday as northwesterly winds diminish to become fresh to strong and seas subside to become moderate. && .BEACHES... Issued at 242 PM PDT Thu Jun 4 2026 A Beach Hazards Statement will go into effect at 3 AM Friday through 9 AM Saturday due to an increased risk of sneaker waves and strong rip currents. Long period southwest swell is approaching the Pacific coast, with periods of 17 to 18 seconds and a height of around 3 feet in the open waters. These long period swells result in increased risk of sneaker waves, potentially deadly waves which surge much further up the beach than expected and sweep unaware beachgoers into the ocean, and strong rip currents that can sweep the strongest swimmers away from shore. Never turn your back to the ocean! Inexperienced swimmers should stay from the water. Observe the waves for 20 minutes before moving closer. Swim near a lifeguard if possible, and if caught in a rip current, swim parallel to the coast away from the current, and then at an angle to shore. RGass && .MTR WATCHES/WARNINGS/ADVISORIES... CA...Beach Hazards Statement from late tonight through Saturday morning for CAZ006-505-509-529-530. PZ...Small Craft Advisory until 9 PM PDT this evening for Mry Bay. Gale Warning until 3 AM PDT Saturday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM. Small Craft Advisory until 3 AM PDT Friday for Pigeon Pt to Pt Pinos 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm. Small Craft Advisory until 3 PM PDT this afternoon for Pt Pinos to Pt Piedras Blancas 0-10 nm. Gale Warning until 3 AM PDT Friday for Pt Pinos to Pt Piedras Blancas 0-10 nm. && $$ SHORT TERM...MM LONG TERM....MM AVIATION...Navarrete MARINE...RGass Visit us at www.weather.gov/sanfrancisco Follow us on Facebook, X, and YouTube at: www.facebook.com/nwsbayarea x.com/nwsbayarea www.youtube.com/nwsbayarea

101 FXUS66 KOTX 042045 AFDOTX Area Forecast Discussion National Weather Service Spokane WA 145 PM PDT Thu Jun 4 2026 .KEY MESSAGES... - Occasional mountain shower chances and cooler late this week into this weekend. - Wind gusts 30 to 40 mph possible Friday afternoon. && .SYNOPSIS... Dry, stable conditions expected today followed by winds across the Basin on Friday. For the weekend, cooler and showery conditions return, with periodic breezy to windy conditions. Another round of showers expected midweek. && .DISCUSSION... Today through Friday: A low in the Gulf of Alaska is moving southeast towards the state of Washington. Lingering showers near northeast Washington and Northern Idaho are visible on radar and will continue for the next few hours. Elsewhere, expect dry and near normal temperatures through the rest of the day. Lows tonight will be in the mid 40s to low 50s. West to southwest winds moving across the Cascades will result in breezy conditions with gusts 20-25mph through the evening. Tomorrow, the low will move into the forecast area, and a tightening pressure gradient will lead to gusty winds regionwide. This will be the primary weather concern for tomorrow. Winds will gust to 25-30 mph through much of the Basin and Spokane/CdA area, but in the Wenatchee and Waterville Plateau areas have the potential to gust to 35-40 mph. Combined with low relative humidities, main concerns will be fire weather related, especially for any new fire starts. In areas with the higher winds, patchy blowing dust is possible. Driving in areas with stronger winds could be challenging, especially in high profile vehicles. No shower activity is expected. Saturday through Sunday: The low continues to pass slowly through the area on Saturday, bringing mostly dry conditions apart from the Cascades and northern mountain areas. 850mb temperatures over the Cascades support light snow for this precipitation, though no accumulations are expected. Elsewhere, precipitation type will be rain. A couple hundred Joules of CAPE will result in 10-20% chance of thunderstorms across much of the areas receiving precipitation. Winds tomorrow remain gusty through much of the Basin and Palouse areas, with gusts 20-25 mph anticipated. Sunday will remain dry apart from some light showers in the Idaho Panhandle. The incoming lower heights will lead to cooling temperatures, with Saturday anticipated to be the cooler day. High temperatures will be in the low to mid 60s, nearly 10 degrees below normal. Saturday night into Sunday, temperatures drop into the high 30s. Should temperatures continue to trend this way, frost issues may be seen early Sunday morning. Monday through Wednesday: Another low pressure system will impact the area at the beginning of the next work week, and is expected to bring a round of widespread beneficial precipitation to the forecast area. Temperatures will continue to trend a few degrees below normal. Long term models support 50-150 J/kg of CAPE and a low chance of thunderstorms with this rain, but will need to keep an eye on trends. Current precipitation estimates show the Columbia Basin seeing 0.25 inches of rain or more Tuesday through late Wednesday night, with deeper Basin areas seeing less at 0.10-0.25 inches. Mountain areas could receive up to 0.50 inches. /AS && .AVIATION... 18Z TAFs: VFR conditions expected through the forecast period. Main impacts will be gusty winds in the Columbia Basin at terminals GEG, SFF, COE, and PUW between now and 00-02Z. Ceilings will remain scattered at 3000-5000 ft AGL around 02Z, then ceilings will rise above 10k ft AGL. Winds will pick up again across most areas around 12-15Z as the pressure gradient across the Cascades strengthens. Wind gusts through 18Z will be 21-25kts at most, but early into next forecast period looks to increase to 25-30kts. FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: High confidence in VFR conditions to prevail through the forecast period. Low to moderate confidence in timing of winds increasing tomorrow. /AS ----------------------- Confidence descriptors: Low - Less than a 30 percent chance Moderate - 30 to 70 percent chance High - Greater than a 70 percent chance For additional probabilistic information for NWS Spokane airports, please refer to the Aviation Dashboard on our webpage: https:/www.weather.gov/otx/avndashboard && .Preliminary Point Temps/PoPs... Spokane 47 69 44 63 39 65 / 0 0 0 0 0 0 Coeur d`Alene 47 68 46 61 40 63 / 0 0 0 10 0 10 Pullman 43 67 43 60 38 62 / 0 0 0 0 0 0 Lewiston 50 76 51 68 45 69 / 0 0 0 10 0 10 Colville 43 71 37 65 32 67 / 0 0 0 40 10 10 Sandpoint 46 67 44 60 38 62 / 0 0 0 20 10 10 Kellogg 45 68 45 60 39 61 / 0 0 0 20 0 10 Moses Lake 46 73 42 68 37 72 / 0 0 0 0 0 0 Wenatchee 52 70 48 66 45 72 / 0 0 0 0 0 0 Omak 50 73 43 65 38 71 / 0 0 0 60 10 0 && .OTX WATCHES/WARNINGS/ADVISORIES... WA...None. ID...None. && $$

556 FXUS66 KPDT 042246 AFDPDT Area Forecast Discussion National Weather Service Pendleton OR 346 PM PDT Thu Jun 4 2026 .KEY MESSAGES... - Showers and isolated thunderstorms along the Cascade crest Friday and Saturday - Breezy Cascade Gap winds today will spread to the lower elevations Friday and Saturday - Dry conditions Sunday before an active weather pattern returns through the middle of next week && .DISCUSSION... Today through Saturday: Satellite imagery today shows mostly clear conditions while surface observations report breezy winds through the Cascade gaps. Dry conditions with locally breezy conditions will continue through the remainder of the day as the PacNW sits under a quasi-zonal flow. Flow aloft will gradually gain a southerly component tonight through tomorrow morning as an upper low drops out of the Gulf of Alaska, with the low arriving just offshore Vancouver Island by tomorrow afternoon. The low arrival will bring rain showers to the WA Cascade crest, while a tightening cross-Cascade pressure gradient will result in breezy winds (15-25 mph with gusts up to 40 mph) through the Cascade gaps and lower elevation areas. While fire weather concerns will overall remain low, there will be elevated conditions in the WA Columbia Basin as afternoon RHs dip below 25% and sustained winds will near 20 mph (confidence 30-50%). Saturday, the upper low will swing across the PacNW, but limited moisture associated with this system will confine shower chances to the Cascade crest. Increasing surface instability with increased low to mid level lapse rates across the Cascade crest/east slopes will also allow for slight chances (15-25%) of isolated thunderstorms in the afternoon and early evening. Otherwise, breezy westerly winds will continue across the lower elevations through Saturday evening. Sunday through Wednesday: By Sunday morning, mostly dry conditions and light winds will develop across the region as the upper low departs to the east and a transient ridge moves over the PacNW. Early to mid next week, ensemble guidance is in good agreement that the PacNW will be under a prolonged troughing pattern that will bring widespread shower chances as the trough meanders across the region. There is some disagreement in the strength of the trough as it moves across the PacNW; about 25% of members favoring a closed low, which would result in higher precipitation amounts and better thunderstorm chances in the mountains Tuesday into Wednesday. Disagreement in position/timing of the trough/low passage also grows into the middle of next week, as ~30% of ensemble members favor the trough and showers exiting the region Wednesday afternoon, while the remaining members show showers and the trough still over the region. Confidence in precipitation chances through this period is moderate (60-70%), however confidence in timing is low (25-35%). Lawhorn/82 && .AVIATION /00Z TAFS THROUGH 00Z SATURDAY/... VFR conditions are forecast for the next 24 hours at all sites. Winds will be breezy (10-15 kts with higher gusts) during the afternoon and evening hours, especially Friday. && .FIRE WEATHER... Dry conditions and mostly locally breezy winds will persist today. A system approaching the region will bring widespread breezy winds tomorrow through Saturday. This will lead to elevated fire weather concerns in the WA Columbia Basin in the afternoon (30-50% chance of wind/RH criteria being met). Showers and isolated thunderstorms will develop along the Cascade crest tomorrow through Saturday, with dry conditions and light winds returning Sunday. An active weather pattern returns next week. && .Preliminary Point Temps/PoPs... PDT 47 72 44 66 / 0 0 0 0 ALW 52 73 49 67 / 0 0 0 0 PSC 49 77 46 71 / 0 0 0 0 YKM 47 74 43 68 / 0 0 0 10 HRI 50 73 45 69 / 0 0 0 0 ELN 43 65 38 60 / 0 0 0 40 RDM 39 72 37 62 / 0 0 0 0 LGD 43 74 42 63 / 0 0 0 10 GCD 41 79 40 65 / 0 0 0 10 DLS 51 71 48 66 / 0 0 0 30 && .PDT WATCHES/WARNINGS/ADVISORIES... WA...None. OR...None. && $$ DISCUSSION...82 AVIATION...86 FIRE WEATHER...82

438 FXUS65 KREV 041951 AFDREV Area Forecast Discussion National Weather Service Reno NV 1251 PM PDT Thu Jun 4 2026 .KEY MESSAGES... * Warm and dry conditions continue through Friday, with highs 10 to 15 degrees above normal and areas of Moderate HeatRisk across lower valleys. * Southwest to west breezes increase Friday with brief elevated fire concerns. Stronger winds and higher fire risk is expected Saturday. * Some cooling returns this weekend, with temperatures near or slightly below early June averages Sunday through much of next week. Gusty winds and shower chances may also return next week. && .DISCUSSION... The synoptic pattern across the western US remains dominated by low-amplitude ridging through Friday, maintaining a warm and dry air mass. A change in the pattern begins on Friday as the next Pacific storm system approaches the region. This will tighten the pressure gradient leading to increasing southwest to west winds, especially on Saturday. A significant shift to cooler, wetter and unsettled weather occurs next week due to the aforementioned trough descending into the Great Basin. Rain and isolated thunderstorm chances return to the forecast. * Temperatures: Friday remains with well above seasonal averages around 10-15 degrees above normal. Western NV valleys can expect afternoon highs in the upper 80s to mid 90s, while Sierra communities reach the upper 70s to low 80s. This prolonged warm period combined with very dry air, will lead to widespread Moderate HeatRisk across lower valleys. Overnight lows remain in the 50s-60s for valleys, and 40s for Sierra communities. A cooling trend begins this weekend through much of next week. By Sunday, high temperatures drop to below seasonal averages. This cooler trend continues through Tuesday with the NBM showing highs in the mid 70s for Reno, and low 60s for South Lake Tahoe. * Winds: Winds will be relatively light today as the region sits between systems. Afternoon W-NW breezes are expected, with gusts generally below 20 mph. Afternoon gusts of 25-35 mph are expected across much of the region on Friday, with some areas seeing gusts up to 30-35 mph, particularly in wind-prone corridors and along the eastern Sierra slopes by Friday evening. The strongest winds are anticipated on Saturday. Southwest to west wind gusts of 35-40 mph are likely across much of western NV and eastern CA, with localized higher gusts up to 50 mph possible over exposed ridges, particularly in the Greater Lake Tahoe and Mono County areas. These strong winds, combined with very low relative humidity (minimum RH generally 8-15% in lower valleys), will lead to elevated to locally critical fire weather conditions across much NV. Periods of gusty winds will continue into early next week. NBM guidance suggests sustained winds and gusts will remain elevated, with gusts potentially reaching 30+ mph on Monday and Tuesday, particularly across exposed terrain and valleys. * Precipitation: Dry conditions will prevail through Sunday. Increased shower chances are forecast from Monday afternoon through Wednesday, especially for areas near and north of I-80 and the Tahoe region. The latest ensemble guidance, including the NBM, leans slightly wetter for these northern areas, with 10-35% for showers on Monday and Tuesday in the Tahoe/Truckee area, and a 5-15% chance for storms. Elsewhere across western Nevada and Mono County, chances for measurable rain remain lower, typically in the 5-10% range. While confidence in widespread significant precipitation remains low, isolated light showers cannot be ruled out. -HC && .AVIATION... VFR conditions prevail with only KTRK having 10% chance for patchy FG. Winds will be generally from the west between 20-03Z with gusts up to 15 kts today and 25 kts tomorrow. However, Sierra Front terminals have a 40-50% chance of brief periods exceeding 30 kts. Saturday keeps the higher impacts with SW-W gusts of 25-35 kt at the main terminals. FL100 fo 30-40 kts will likely result in areas of turbulence, crosswinds, and LLWS over and east of the Sierra. -HC && .FIRE WEATHER... Warm and very dry conditions through Friday will maintain very large afternoon vapor pressure deficits (40-50 hPa), especially across western NV lower valleys, where RH falls into the single digits and low teens. This will continue to dry fine fuels, with localized elevated fire weather concerns today. Elevated to brief periods of near critical are expected on Friday, where SW-W gusts of 25-35 mph overlap receptive grasses and brush over western NV and portions of eastern Lassen/Plumas counties. Saturday remains the primary concern as the strongest winds arrive after several days of drying. Southwest-west gusts over 35 mph are likely across much of western NV and portions of eastern CA, with minimum RH generally 8-18% in lower valleys. Longer critical wind/RH overlap supports elevated to critical fire weather conditions, where fuels are sufficiently cured. For the aforementioned reasons a fire weather watch is in effect for Saturday from 11AM to 11PM. HC && .REV Watches/Warnings/Advisories... NV...Fire Weather Watch from Saturday morning through Saturday evening NVZ420-423-429-458. CA...Fire Weather Watch from Saturday morning through Saturday evening CAZ278. && $$

341 FXUS66 KSTO 042050 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 150 PM PDT Thu Jun 4 2026 .KEY MESSAGES... -Very warm conditions continue through Friday with Widespread moderate HeatRisk with. Cooling to near normal temperatures starts Saturday, dropping below normal early next week. -Dry weather except for chances of showers Monday and Tuesday, with the potential beginning to increase. -Breezy afternoon and evening winds through Sunday with low humidity bringing a few areas of elevated fire conditions. && .DISCUSSION... ...Main update to the forecast is increasing chances of light rain showers Monday and Tuesday, now extending into the Sacramento Valley and Delta(15-25% chance)... ...Today and Friday... Temperature forecast still on track with highs 10-15 degrees above normal, generally in the mid to upper 90s for . NBM probabilities in the Valley show a 20-30% chance of temperatures reaching 100 degrees or greater. Winds aloft will be from the west northwest as a weather system drops south out of the Gulf of Alaska, which will bring delta breezes and breezy west to northwest winds at times. ...Saturday and Sunday... The trough from the Gulf of Alaska(generally less then 30%) look to be confined to the will knock down the ridge over the weekend, with notably cooler, near normal high temperatures. This means mainly mid to upper 80s for the Valley, Delta and lower foothills. Relative humidities remain low in the Valley and combined with the gusty northwest winds will bring a few hours of elevated fire concerns in the north Sacramento Valley through Sunday. This system will be dry, with wind and and cooler temperatures the main effects. A secondary trough will move in behind the first for early next week. This system has more moisture, and ensembles have been trending deeper and wetter with it. Chances have increased for the foothills and mountains, and are now extending into the Sacramento Valley. Stay tuned as more details become know about this system. && .AVIATION... VFR conditions with clear skies at TAF sites over the next 24 hours. Northwest surface winds sustained 10 to 15 kts with gusts 15 to 20 kts in the northern San Joaquin Valley through early Friday morning (10Z). In the Delta vicinity, west winds sustained 10 to 15 kts with gusts to 20 kts through 12Z Friday. Northwest winds decreasing for the Sacramento Valley generally 10 kts or less this evening and overnight, increasing after 16Z Friday to 10 kts with gusts to 20 kts for the northern Sacramento Valley. && .STO WATCHES/WARNINGS/ADVISORIES... None. && $$

028 FXUS65 KMSO 041925 AFDMSO Area Forecast Discussion National Weather Service Missoula MT 125 PM MDT Thu Jun 4 2026 .DISCUSSION... KEY MESSAGES: - Drying trend through Friday with building high pressure. - Showers, thunderstorms, and cooler temperatures return this weekend, focusing along the divide, Lemhi County, and southwest Montana. - Monitoring trend for widespread precipitation by Wednesday and Thursday next week with a closed low pressure system. A few showers and thunderstorms remain in northwest MT. A few of these showers will be capable of quickly precipitating 0.10 to 0.25 inch. These showers will diminish late afternoon as the forcing moves east. Friday, transient high pressure brings near normal temperature and the potential for elevated fire weather concerns in southwest MT. As fast as atmospheric heights increase, the next trough pushes into the Pacific northwest. Afternoon winds will increase, especially in southwest MT. While most locations can expect west winds 15 to 25 mph, southwest MT will see gusts to 35 mph, with a 40 to 60 % chance of gusts up to 40 mph. The combination of minimum RHs in the 20s with winds 15 to 35 mph, leads to the elevated fire weather concerns, use caution with any open flames. Saturday the trough pushes instability into our area along with slightly cooler temperatures. Expect a breezy afternoon, temperatures 5-10 degrees cooler, and isolated showers and thunderstorms. The drier conditions in southwest MT may allow for an isolated strong storm producing outflow gusts up to 45 mph. Sunday and Monday, breezy conditions and an isolated thunderstorm remain in the forecast for southwest MT. Additionally, cooler temperatures could produce light snow in the mountains above 6000 feet Sunday morning. Sensitive vegetation may require protection both Sunday and Monday mornings due to frost as temperatures may lower into the low to mid 30s depending on cloud cover. Virtually all models continue to demonstrate another trough affecting the northern Rockies mid next week. There remains many questions on the depth, strength, and speed of the trough passage. Currently, the National Blend of Models has widespread probabilities of 50 to 80% of receiving a 0.50" or more of precipitation. && .AVIATION...West- northwest surface winds are expected this afternoon, with gusts reaching 15-20kts. Through 4/2400z, a few showers or thunderstorms will be possible in northwest MT in the vicinity of KGPI. Expect brief but rapid reduction in visibility in stronger showers. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...None. ID...None. && $$

476 FXUS65 KBOI 042033 AFDBOI Area Forecast Discussion National Weather Service Boise ID 233 PM MDT Thu Jun 4 2026 .KEY MESSAGES... - Breezy winds through the end of the week into the weekend, with the strongest winds on Saturday. - Near to below normal temperatures through the middle of next week, except Friday with highs around 10 degrees above normal. - A cooler and wetter pattern is likely next week with significant precipitation totals possible. && .SHORT TERM /Through Saturday Night/... Zonal flow continues today as a trough off Haida Gwaii moves south along the BC coast today. As the trough moves south, the flow aloft shifts to the southwest, allowing for around 10 degrees of warming on Friday afternoon. This trough will move into WA on Friday afternoon, bringing a dry cold front through eastern OR on Friday evening. Gusty winds up to 35-45 mph possible Friday evening along the I-84 corridor from Baker City to Ontario OR as the cold front moves through. Winds elsewhere will not be fully realized as the cold front passes through during the overnight hours. The trough continues to move across WA on Saturday, with mostly cloudy skies. Showers and thunderstorms will generally be confined to areas north and east of our region, across eastern Idaho and the central ID panhandle. Dry and breezy conditions expected Saturday afternoon, with temperatures near normal or around 10-15 degrees cooler than Friday. && .LONG TERM /Sunday through Thursday/... Showers in central Idaho move east Sunday as an upper level trough moves into western Montana. The showers bring a 10-20% chance of precipitation to the northeastern corner of Valley County, with a similar chance of thunder in the afternoon. As the trough moves out, much of Idaho sees gusty winds. Winds will be especially strong in south-central Idaho and parts of the Snake Plain between Boise and Twin falls. Gusts in these areas are forecast to be 25-35 mph. Afternoon maximum temperatures behind the trough will be about 5 degrees below normal. Temperatures won`t have much time to rise following the cool and breezy weekend, as models are in broad consensus bringing a strong trough through Idaho early next week. Models vary the most in the trough`s amplitude, whether it closes and vorticity strengthens or remains a wave in the broader flow. This impacts forecasted precipitation coverage the most, but timing and placement is mostly consistent. Precipitation begins to move into southeast Oregon Monday evening, moves over all of southeast Oregon and southwest Idaho on Tuesday, and then southwest/central Idaho as it exits eastward Wednesday and Thursday. These areas see a 20-40% chance of precipitation, except on Tuesday where the core of the low bring a 50-70% chance of precipitation over mountains. Rainfall through the entire event is forecast to total up to 0.1 inches in lower elevations and up to 0.75 inches in mountains. Thunder is possible each day, especially Tuesday. A limiting factor of thunderstorms will be cooler surface temperatures with the low and cloud cover inhibiting instability. Thunderstorms could bring much higher local rainfall amounts to all elevations. The lower surface temps bring some snow to summits and ridgelines. Additionally, wind gusts increase in ridgelines and open areas during the low`s passage. Each afternoon sees gusts 15 to 30 mph until Thursday where gusts in southeast Oregon weaken. && .AVIATION /18Z Thursday through Friday/... Issued 1100 AM MDT THU JUN 4 2026 VFR, a few high clouds this evening. Surface winds: W-NW 5-15 kt, with gusts 15-30 kt, increasing east of KBOI. Winds light and variable this evening. Winds aloft at 10kft: W 10-20 kt. KBOI...VFR. Surface winds: NW 8-13 kt, gusts 20 kt in the afternoon. Light SE winds tonight. Weekend Outlook...Mainly VFR. Mostly clear on Friday with increasing high clouds on Saturday. A 10-20% chance of showers and thunderstorms across the northern mountains Sunday. Surface winds: SW-NW 5-15 kt with gusts 15-30 kt Friday, becoming W-NW 10-20 kt with gusts 20-35 kt Saturday and Sunday. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...None. OR...None. && $$ www.weather.gov/Boise Interact with us via social media: www.facebook.com/NWSBoise www.x.com/NWSBoise SHORT TERM...KA LONG TERM....JM AVIATION.....JM

819 FXUS65 KLKN 041954 AFDLKN Area Forecast Discussion National Weather Service Elko NV 1254 PM PDT Thu Jun 4 2026 .KEY MESSAGES... * Warm and dry and breezy into Saturday. * Critical fire weather conditions on Saturday afternoon as southwest winds increase ahead of a dry cold front. * Active pattern early next week brings unsettled weather and cooler temperatures. && .DISCUSSION... (This afternoon through next Thursday) WEATHER PATTERN OVERVIEW: High pressure remains dominant over the region through early Saturday with above normal temperatures. No record highs are forecast but Ely will come close to a daily record high on Friday (50% chance of at least tying the record of 91). Breezy conditions in the afternoon today and Friday, with stronger winds bringing breezy to locally windy conditions on Saturday as a long wave trough moves into the Pacific Northwest. A weak surface low and attendant cold front will move southeast across Oregon into the Silver State bringing a tightened pressure gradient and a much more widespread zone of afternoon wind gusts from 35 to 40 mph from the southwest across areas along and north of US 50 and along and southeast of US 6 in Nye and White Pine Counties. Strongest wind gusts look to take shape in White Pine County with a 50% chance for wind gusts of at least 40 mph Saturday. Minimum relative humidity values from 10 to 15% Saturday afternoon will combine with winds to produce critical fire weather conditions for most of northern and central Nevada. See fire weather discussion below for more details. Little to no rainfall is expected with moisture limited along and ahead of the front. A secondary trough quickly moves in behind the first Sunday with slightly cooler highs in the upper 70s to lower 80s. A few lingering showers and thunderstorms in White Pine County (20% or less) along the remnant cold frontal boundary. Moisture remains the limiting factor once again. Long wave troughing looks to remain the main feature at play into early next week. This will favor a more unsettled pattern featuring highs closer to normal then slightly below normal into the second half of next week. Best chances for showers and thunderstorms will be across northern Nevada north of I-80 where precipitable water value anomalies finally increase above normal. Nearly a 25% chance for showers and isolated thunderstorms each afternoon across northern Elko and Humboldt Counties each afternoon Tuesday through Thursday. Otherwise, afternoon cumulus buildups are expected with CAPE values of 50 to 100 J/kg across most of northern and central Nevada. Breezy southwest winds Monday and Tuesday before turning more west-northwesterly Wednesday and Thursday behind a weak cold front that moves across the region Tuesday night. FORECAST CONFIDENCE & DEVIATIONS: High confidence for above normal temperatures through Saturday and hot, dry, windy conditions on Saturday as medium-range ensemble clusters are in good agreement with incoming long wave trough. 80-90% confidence in Red Flag conditions across southern portions of Fire Zone 425 and central portions of Fire Zones 424, 438, 469, and 470. Moderate confidence in long wave troughing pattern through the middle portion of next week with warm and breezy conditions. Long range ensemble clusters vary in amplitude of the trough early next week, which will influence how far south showers and thunderstorms creep into northern and central Nevada as the cold front passes through Tuesday night. && .AVIATION... VFR conditions expected at all sites through the next 24 hours. Winds will generally be light, however KEKO/KELY/KTPH can all expect a few hours of gusts up to 20KT during the afternoon today. && .FIRE WEATHER... Mild fire weather conditions are expected today and tomorrow, with a few strong afternoon breezes creeping into western Humboldt county for tomorrow. Near critical to critical conditions are expected on Saturday due to strong winds above 30 mph and very dry conditions expected to develop across the coverage area, with Fire Weather Watches out for six of eight fire zones. The wind/RH threat dies off for Sunday but the dry thunder risk still shows signs of taking its place, although the environment has weakened even compared to yesterdays marginal setup. Winds look to increase again on Monday and enhanced fire weather conditions are forecast for central Nevada. && .LKN Watches/Warnings/Advisories... Fire Weather Watch in effect from 11 AM through 11 PM PDT Saturday for NVZ424-425-427-438-469-470. && $$ DISCUSSION...84 AVIATION...94 FIRE WEATHER...94