091 FXUS66 KSEW 012146 AFDSEW Area Forecast Discussion National Weather Service Seattle WA 246 PM PDT Mon Jun 1 2026 .SYNOPSIS...An upper level ridge will build across the Pacific Northwest early this week, resulting in warming temperatures through Tuesday. Temperatures will peak on Tuesday, resulting in Minor to Moderate HeatRisk as well as much lower daytime relative humidity values. Onshore flow increases Wednesday as the upper ridge weakens. The next disturbance approaches Western Washington later in the week. && .SHORT TERM /TONIGHT THROUGH WEDNESDAY NIGHT/...Warm and dry weather on tap through Tuesday due to high pressure and offshore flow. Highs on Tuesday will reach the 80s to low 90s with warmest spots away from the sound. We`re expecting minor to moderate HeatRisk for this event. The air mass will be dry as well with daytime min humidities in the 20s and 30s - keeping fire weather conditions elevated. However, gusty east winds will peak in the morning hours and not coincide with the warmest/driest conditions. Wednesday brings cooler conditions with a trough and a return of onshore flow. Forecast highs are in the 60s to lower 70s and closer to average. The trough will bring a chance of showers and thunderstorms to the Cascades where instability is the greatest. Showers will taper down Wednesday night. 33 && .LONG TERM /THURSDAY THROUGH MONDAY/...A deep upper low, off BC, keeps western WA cool moving into the weekend. Highs will track a few degrees cooler than normal and in the lower to mid 60s. Expect lows in the 40s and 50s. Showers increase on Saturday as the low spins overhead. The air mass is slightly unstable for a chance of thunderstorms in the interior and Cascades. Showers with a convergence zone are expected too (over the north/central sound). A ridge brings some drying and slightly warmer conditions on Sunday. A weak, splitting front approaches the coast on Monday. 33 && .AVIATION...Northerly flow aloft tonight will become westerly on Tuesday as an upper ridge over the region gradually shifts eastward. Weak low level offshore flow will turn onshore late in the day on Tuesday. VFR conditions will prevail through Tuesday. KSEA...VFR. Surface winds northerly 8 to 12 knots with occasional higher gusts this afternoon will ease this evening and become light northeasterly tonight. Winds will shift west/northwesterly Tuesday afternoon before backing southwesterly Tuesday night. && .MARINE...Thermally induced low pressure will expand northward into the area tonight for light offshore flow. The thermal trough will shift inland Tuesday afternoon for the commencement of onshore flow. A dissipating frontal system will reach the waters on Wednesday. Surface high pressure will rebuild across the waters Wednesday night into Thursday for stronger westerlies in the strait. A broad trough and associated front will cross the waters Friday and Saturday. Coastal seas are expected to remain below 10 feet through the period. 27 && .FIRE WEATHER...An upper level ridge will setup a dry and warm pattern through Tuesday across the region with light offshore flow developing as a weak thermal trough builds north over the Puget Sound region. Tuesday remains on track to be the warmest day, with daytime high temperatures reaching into the 80s and a few spots touching 90. Winds still appear to be relatively light, but a few gusts to 15-20 mph near the Cascades and over the exposed ridgetops remain possible. Poor overnight recoveries are expected tonight into Tuesday morning, with daytime RHs Tuesday likely to approach 20%. However, this stretch appears short-lived, with a resumption of onshore flow bringing higher humidities for the second half of the week. && .SEW WATCHES/WARNINGS/ADVISORIES... WA...None. PZ...None. && $$

035 FXUS66 KPQR 012155 AFDPQR Area Forecast Discussion National Weather Service Portland OR 255 PM PDT Mon Jun 1 2026 .SYNOPSIS...High pressure will maintain very warm and dry conditions through Tuesday. Moderate HeatRisk is expected along the I-5 Corridor north of Salem, including the Portland/Vancouver Metro. Cooler temperatures return Wednesday to Thursday as a weak shortwave trough swings through the region. Slight chances for showers along the coast, Coast Range, and Cascades on Wednesday. Cool trend continues at the end of the week as a deeper trough arrives from the Gulf of Alaska, returning widespread chances for rain Friday into the weekend. && .SHORT TERM...Today through Tuesday night...Satellite imagery and surface observations as of early Monday afternoon depicts mostly sunny skies across northwest Oregon and southwest Washington as upper level ridging amplifies offshore. Temperatures are on track to rise into the low to mid 80s across interior valleys today. HeatRisk is generally "Minor," aside from the direct Portland Metro where HeatRisk is Moderate. This means that the heat will affect those who are sensitive to heat, especially those without cooling/hydration. While daytime highs will be warm, overnight lows will be in the mid to upper 50s. Not quite cold, but cool enough for relief. Tuesday is the peak of the heat with the high pressure reaching it`s maximum intensity. The axis of the ridge shifts over western Oregon and Washington Tuesday afternoon. Easterly winds are also expected to increase out of the Columbia River Gorge Tuesday morning as thermal troughing sets up, bringing drier air. The easterly flow combined with downsloping from the Cascades of the warm temperatures aloft will be even more heating. Expect afternoon temperatures on Tuesday to rise by around 5-7 deg F compared to today with urban areas sitting in the low 90s and the other inland lowlands closer to 85-90 deg F. Chances for exceeding 90 deg F are around 75-90% for the greater Portland/Vancouver Metro Area, 50-70% for the Cowlitz Valley and central Willamette Valley, and 5-10% for the southern Willamette Valley and Upper Hood River Valley. Moderate HeatRisk is much more widespread shifting into the Lower I-5 corridor and south towards Salem. Therefore, take precautions on Tuesday if participating in outdoor activities, especially during peak afternoon heating. Overnight lows Tuesday night into Wednesday night generally remain below 60 deg F, however, there is still a 20% chance that Wednesday morning lows remain above 60 degrees across the Portland/Vancouver Metro. The heat is not expected to last long, as a decent marine push is expected by later Tuesday evening ahead of an upper shortwave trough. Another consideration is the impact of the offshore flow on both Monday and Tuesday. This easterly flow will cause humidity to drop considerably during the day with minimum humidity reaching the teens in some locations near the mouth of the Columbia River Gorge. Outside of the coast, cannot rule out humidity around 20-25%. These values are fairly dry for this time of year and therefore you should refer to your local authorities for any kind of burning restrictions. -10/27 && .LONG TERM...Wednesday through Sunday...A pattern change toward cooler weather arrives Wednesday to Thursday. If you have been tracking the forecast over the last few days, you know that there is a low pressure system and negatively tilted trough positioned over the northeast Pacific near the Aleutians and Gulf of Alaska. Beginning Wednesday, this low will advect cooler air over the region and enhance onshore flow as a surface front from a shortwave trough swings through. Model guidance continues to suggest that this front decays as it enters the Pacific Northwest; therefore, impacts will be minimal in the way of potential precipitation. However, we will see relief from warming temperatures with high temperatures dropping by around 15 deg F on Wednesday due to increasing cloud cover. Onshore flow returns, leading to a wind shift to westerly winds, breeziest through the central Columbia River Gorge and Upper Hood River Valley. Despite the limited moisture, this frontal band will still bring a 15-30% chance for showers along the coast, Coast Range, and Cascades Wednesday to Thursday morning, while chances for measurable precipitation remain under 10% for interior valleys. Friday into the weekend, the majority of ensemble members (>80%) are suggesting that the broad upper trough near the Gulf of Alaska will track southeastward into the Pacific Northwest. In general, there are increasing chances for rain on Friday and Saturday as another front swings through, but very low chances for any impactful weather. It`s not until Sunday where the ensemble guidance begins to show uncertainty in the exact progression of the trough. While we have higher confidence for onshore flow, cooler temperatures, and more wet weather at the end of the week, there is still uncertainty with exact precipitation amounts. Ensemble guidance suggests 24-hour rainfall accumulation could range anywhere from 0.01-0.10 (10th and 25th percentiles) up to 0.35-0.70 (closer to the 90th percentile). Showers that linger on Sunday will be light. -10/27 && .AVIATION...Offshore high pressure will begin to move onshore through the period, supporting continued VFR flying conditions across the airspace. Largely clear skies aside from few-sct high cirrus at or above 25 kft will persist through tonight. Diurnal north to northwest winds of 8-12 kt inland and 10-15 kt with gusts as high as 20-25 kt along the coast will ease below 5 kt out of the north to northeast tonight. Stronger east winds around 10 kt are expected to develop tonight in the Cascades and through east- west oriented terrain gaps, including along and west of the Columbia River Gorge as far as KTTD, and possibly to KPDX by Tuesday afternoon. KPDX AND APPROACHES...VFR conditions expected throughout the period beneath largely clear skies aside from few-sct high cirrus at or above 25 kft. Diurnal north to northwest winds near 10 kt will ease below 5 kt by 03-06z Tue. East winds of 10-15 kt will develop along the Columbia River Gorge reaching west to KTTD tonight, and possibly to KPDX after 12z Tue. -36 && .MARINE...Surface high pressure offshore continues to support gusty north winds today, before it weakens and moves inland on Tuesday. Small Craft Advisories remain in effect south of Cape Falcon, where the strongest gusts up to 25 kt will peak this afternoon, until 11 PM PDT this evening when winds ease below hazardous thresholds. Northwest winds near 10 kt will otherwise continue through Tuesday, before turning southwesterly ahead of a decaying front Tuesday night into Wednesday. Rain shower chances increase to 20-45% beyond 20-30 NM Wednesday morning, before winds back out of the northwest by Wednesday afternoon behind the boundary. Seas of 4-7 ft at 8-10 seconds with a dominant WNW swell continue through midweek. Troughing looks to remain over the Northeast Pacific resulting in unsettled weather through the remainder of the period. The dominant swell will shift out of the west, with seas rising to 6-9 ft at 10-12 seconds into the weekend. Northwest winds persist through Friday morning, when another front may bring further rain chances into the weekend. -36 && .PQR WATCHES/WARNINGS/ADVISORIES... OR...None. WA...None. PZ...Small Craft Advisory until 11 PM PDT this evening for PZZ252-253- 272-273. && $$ www.weather.gov/portland Interact with us via social media: www.facebook.com/NWSPortland x.com/NWSPortland

164 FXUS66 KMFR 012341 AFDMFR Area Forecast Discussion National Weather Service Medford OR 441 PM PDT Mon Jun 1 2026 .DISCUSSION...Updated Aviation discussion... && .AVIATION...02/00Z TAFs...Gusty winds are present near the Oregon coast, and will be weakening tonight. For now, there has been an LIFR ceiling added to the forecast early tomorrow morning for North Bend. This would burn off through the morning, and the next TAF period will review this further Stable conditions aloft look to keep VFR levels over inland terminals through the TAF period. Inland areas will see normal diurnal breezes tomorrow. -Hermansen && .PREV DISCUSSION... /Issued 130 PM PDT Mon Jun 1 2026/ KEY POINTS... * Dry conditions with much warmer temperatures today and Tuesday. Temperatures peak Tuesday and will be the warmest of the forecast period. * Dry front on Wednesday brings enhanced afternoon breezes and a cooling trend. Best precip chances along coast/Umpqua Basin. Slight chances thunderstorms east of Winter Ridge. * Another stronger, but still mostly dry front late Friday into Saturday. Sharper cool down for Saturday, best chances of precip remain along coast/Umpqua Divide. Somewhat stronger afternoon winds expected Friday. * Similar pattern continues next week = no sharp warm ups expected through the middle of next week (6/10). DISCUSSION...Today (6/1) through Monday (6/8) Aside from a few wisps of high clouds here and there, skies are clear across the entire forecast area this afternoon. The region remains between systems today and Tuesday, with low pressure to the northeast centered over Montana and a stronger/deeper low in the Gulf of Alaska. This puts a shortwave ridge just offshore over the eastern Pacific which will continue a warming trend today and Tuesday. Temperatures will peak on Tuesday, but it`ll feel quite warm today with afternoon highs reaching about 10 degrees warmer than yesterday and about 20-30 degrees warmer than late last week. Expect highs in the mid-upper 80s for the West Side with low-mid 70s for the East Side. Highs trend warmer on Tuesday (about 5 degrees for the West, 10 degrees for the East), when the chance of reaching or exceeding 90 degrees here in Medford increases to 75%. Dry conditions continue during this time with seasonable afternoon breezes. The overall pattern shifts eastward late Tuesday into Wednesday as some energy from the Gulf of Alaska Low brings a weak front through the region. This will be a mostly dry front. There is some potential for some light rain over the marine waters and along the coast, but the front is falling apart after it moves onshore so inland areas will remain dry. There is some weak instability along and east of the Cascades (Crater Lake north and east), which points to some slight thunder chances in that region. Moisture, however, is marginal, so it`ll be difficult for anything to get going but we have introduced a slight chance (10-15%) for thunderstorms mainly east of Winter Ridge. For most folks, the most notable aspect of this front will be some enhanced afternoon breezes (15-25 mph)and around 10 degrees cooler for afternoon highs on Wednesday. Zonal flow persists behind this weak front on Thursday, so after a cloudy start for folks along the coast and in the Umpqua Basin, afternoon highs will be similar to those of Wednesday. Low pressure in the Gulf of Alaska swings into the region late Friday into Saturday, bringing another decaying front and a sharper cool down for Saturday. There`s some uncertainty on just how far south this trough and decaying front make it with the EC being the farther south solution compared to the GFS. Either suite of solutions maintains the best chances (20-40%) for light precipitation to be along the coast and in the Umpqua Basin, but there could be some sprinkles (10% chance) for areas as far south as the OR/CA border. Expect another round of enhanced afternoon breezes Friday which could be a bit stronger than what`s expected on Wednesday (20-30 mph gusts). The trough moves fairly quickly through the region, making it east of the area by Sunday afternoon. A shortwave ridge follows behind, bringing a warming trend for Sunday into Monday, but still not as warm as what`s expected for today and Tuesday. Beyond Monday, models have varying solutions on whether another Gulf of Alaska Low moves through the region (30-40% chance for cooler with NW precip chances) or we remain in a more zonal flow with some slightly building heights (60-70% chance for warmer and drier). Either way, we don`t see any sharp warm ups in the forecast through the middle of next week. /BR-y MARINE...Updated 1200 PM PDT Monday, June 1, 2026...The thermal tough pattern will weaken today as it shifts inland, which will bring steadily decreasing winds through the afternoon and overnight. Very steep seas will persist across the outer waters south of Cape Blanco through the afternoon. Steep seas will gradually retreat southward this evening, first lingering across all areas south of Reedsport, then south of Cape Blanco in the outer waters late tonight into Tuesday morning. Improved conditions are expected for all areas Tuesday through Wednesday under a light west-northwest swell. A weak trough could bring some light showers to the waters early Wednesday. North winds ramp up briefly on Thursday, likely bringing steep seas to areas from Gold Beach southward. Otherwise, conditions are expected remain below advisory criteria through much of the weekend. FIRE WEATHER...Updated 100 PM PDT Monday June 1, 2026...A warm and dry period is expected as a weak upper level ridge remains over the area through Tuesday. Daily high temperatures will be about 10 degrees above normal for this time of year, with generally light winds (easterly over terrain), and typically dry minimum humidities. An upper level trough passes over the region Wednesday. This will be a mostly dry front, with some light showers possible along the coast and over the Cascades, and isolated thunderstorms are possible east of the Cascades, mainly north and east of Crater Lake. Instability is weak, and with the lack of moisture, it will be difficult for showers to develop, much less thunderstorms, but it is possible. The front will also produce gusty late morning and afternoon winds across most of the area Wednesday, but fortunately humidities will trend higher, so we should stay well above any critical thresholds. Breezy afternoon winds and somewhat cooler temperatures arrive behind the front and persist through the weekend, with temperatures dropping to near or only slightly above normal for early June. Another, weak and mostly dry front arrives this weekend, with gusty afternoon winds being the primary concern Friday and Saturday. Humidities again look to remain above any thresholds for most of the area, but may drop just to those thresholds for an hour or two over portions of the far East Side, namely eastern Modoc and Lake counties. -BPN && .MFR WATCHES/WARNINGS/ADVISORIES... OR...CA...None. PACIFIC COASTAL WATERS...Small Craft Advisory until 2 AM PDT Tuesday for PZZ350-356-370-376. Hazardous Seas Warning until 5 PM PDT this afternoon for PZZ376. && $$

811 FXUS66 KEKA 012214 AFDEKA AREA FORECAST DISCUSSION National Weather Service Eureka CA 314 PM PDT Mon Jun 1 2026 .SYNOPSIS...Above-seasonable temperatures are expected to continue with widespread Minor HeatRisk for the interior through Tuesday. Temperatures will cool gradually starting on Wednesday and into the weekend. A weak cold front will promote a deepening marine layer and coastal drizzle. Enhanced west to northwest winds through the channeled terrain and higher terrain on Wednesday, shifting to the coast Thursday afternoon. && .KEY MESSAGES... - Above-normal temperatures through Tuesday, with interior Minor HeatRisk. - Gradual cooling trend and return of marine layer are expected starting on Wednesday and continuing into the weekend. - Enhanced west-northwest winds through the channeled terrain and higher ridges on Wednesday, followed by breezy north-northwest winds along the coast and exposed ridges on Thursday. && .DISCUSSION...High pressure continue to dominate the Pacific Northwest and Northern California, leading to dry weather and above-normal temperatures. Afternoon interior temperatures peak today with highs in the mid 80s to mid 90s, supported by abundant sunshine and light to gentle breezes. Widespread interior Minor HeatRisk, primarily affecting those who are extremely sensitive to heat and without cooling or hydration. Meanwhile, mild weather throughout the day along the coast with highs mainly in the upper 50s to mid 60s. Tonight into Tuesday, a shallow marine layer is expected to develop along the coast with a light southerly winds nearshore charging up the low clouds and fog near the coastal areas. The high pressure begin to weaken and shift eastward on Tuesday, while a shortwave trough approaches the area. Coastal stratus are expected to lift and scattered out throughout the day on Tuesday, allowing to another sunshine day. Another day of warm to hot temperatures is forecast across the interior on Tuesday, with Minor HeatRisk. Onshore flow will push back inland the stratus early Tuesday evening. The marine layer is expected to slightly deepen Tuesday night into Wednesday. Patchy drizzle is expected to occur with a saturated layer along the North Coast late Tuesday night through Wednesday morning. A gradual cooling trend will start on Wednesday as a cold front moves through. An enhanced west-nortwest winds is expected along the channeled terrain and exposed ridges in the wake of the front. Gusts from 25 to 35 mph are most likely, with locally up to around 40 mph possible. The combination of dry weather, warm temperatures and gusty winds will bring an elevated fire weather threat for eastern Lake County (see Fire Weather section). Other than more persistent coastal low clouds, bouts of patchy drizzle will also be likely Wednesday night through Thursday. Thursday, a surface high pressure will builds in. This will aid in rebounding daytime temperatures across the area on Thursday. In addition, breezy north- northwest gusts of 25 to 35 mph over the coastal and exposed ridges. The NEPAC upper-level trough and zonal flow will trend temperatures cooler Friday and into the weekend. Ensemble cluster analysis suggest the strong upper-level trough digging southward on Saturday. The WPC 500 mb cluster analysis suggest just a 25-30% chance of light rain over Del Norte and farther northern Humboldt counties on Saturday, with a 20% chance on Sunday. Elsewhere will remain with prevailing dry weather. /ZVS && .AVIATION...Clear skies are in place across the area this afternoon with some northwest winds along the coast. Tonight with the weaker wind flow and local southerly flow at the coast, expect there will be a return of low clouds and fog by Tuesday morning. There is still a lot of uncertainty on the timing and height of the ceilings. The HREF shows a few hours of clearing in the afternoon, but confidence is low on that at the immediate coast. Tuesday evening any coastal areas that do clear will likely see a quick return of clouds before sunset. Inland areas are generally expected to remain clear Tuesday night, but stratus will likely make its way up the river valleys near the coast. At this point it looks like UKI will remain clear Tuesday night. MKK && .MARINE...The northerly winds are expected to gradually diminish tonight, mainly near the coast. Farther offshore 15 to 20 kt winds are expected to persist. The waves remain around 7 to 10 feet and are also expected to diminish slightly. This is mainly wind driven waves with a small portion of swell as well. These winds and waves are expected to persist tonight. Tuesday and Wednesday a weak shortwave approaches and moves through the area. This will diminish the winds through the day Tuesday, in the northern waters. These are expected to remain lower Tuesday night and early Wednesday. Wednesday afternoon high pressure builds back into the area and northerly winds quickly increase once again Wednesday night. Thursday and Friday near gale to gale force gusts are expected across the waters once again. This will need to be monitored as it gets closer. Generally the waves are expected to be steep and wind driven with no notable swells. MKK && .FIRE WEATHER...Dry weather with above normal temperatures through Tuesday. A weak cold front will promote an enhanced west-northwest breezes across the channeled terrain and exposed ridges Wednesday afternoon and evening. Good to moderate RH recoveries are expected to prevail for most of the area. Farther south in Lake County, moderate low RH recoveries combine with locally gusty winds over the ridges is expected to bring locally elevated conditions in the fire weather zones 419 and 421 on Wednesday. As result, have to include a headline in the Fire Weather Forecast. Otherwise, dry weather will prevail. /ZVS && .EKA WATCHES/WARNINGS/ADVISORIES... CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until 9 PM PDT this evening for PZZ450. Small Craft Advisory until 9 AM PDT Tuesday for PZZ470. Small Craft Advisory until 3 AM PDT Tuesday 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

430 FXUS66 KMTR 012353 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 453 PM PDT Mon Jun 1 2026 ...New AVIATION, MARINE... .KEY MESSAGES... Updated at 1232 PM PDT Mon Jun 1 2026 - Long period southwest swell will result in an increased risk of sneaker waves and rip currents through Tuesday morning - Slightly cooler temperatures by the end of the week into the weekend && .SHORT TERM... Issued at 1232 PM PDT Mon Jun 1 2026 (This evening through Tuesday) Upper level ridging today will bring warmer weather to the region, but it will be short lived. An upper level trough develops later this evening and then dives into southern California tonight. This will leave us caught between the ridge in the rough on Tuesday. Sensible weather will be breezy onshore winds this afternoon and evening, followed by a deepening marine layer. The marine layer is expected to be around 800-1000feet tonight, which will bring stratus to the coasts and some interior locations. Low temperatures for tonight will be in the upper 40s to low 50s where the marine layer occurs, the low the 50s to mid 50s for interior valleys, and in the mid 50s to low 60s for elevations within the thermal belt. Tuesday, temperatures will falter some due to the pattern shift. Highs will be in the upper 70s to upper 80s for interior valleys and areas of higher terrain, the upper 50s to low 70s along the Pacific Coast or San Francisco Bay. && .LONG TERM... Issued at 1232 PM PDT Mon Jun 1 2026 (Tuesday night through next Sunday) The upper level pattern becomes zonal midweek leaving us with onshore flow, stratus and perhaps patchy drizzle and fog at night, and warmer interior valley and cooler coastal high temperatures. While this occurs an upper level low moves across the Gulf of Alaska and then into the PacNW by late Friday into Saturday. As this happens, our pattern shifts to a trough. Confidence remains high that cooler weather will be on tap. Depending on where it goes will determine the outcome of weather. Right now ensembles favor a trough over the west, which supports the cooler weather and the potential && .AVIATION... (00Z TAFS) Issued at 453 PM PDT Mon Jun 1 2026 A deeper marine layer is expected tonight with widespread MVFR-IFR CIGs. CIGs will be on the IFR-LIFR border along the coast with some potential for fog to develop along the Monterey Peninsula. Generally expecting CIGs to arrive by 08-10Z with CIGs lasting through late Tuesday morning. Moderate confidence on timing of CIG return with high resolution guidance supporting this timing. Breezy to gusty onshore winds continue through this evening, weaken overnight, and restrengthen during the day tomorrow. Stratus looks to return just after the end of this TAF period tomorrow evening. Vicinity of SFO...Gusty onshore winds ease by late this evening with gusty winds returning during the day tomorrow. MVFR CIGs are expected overnight with some potential for IFR CIGs early tomorrow morning. IFR CIGs become more likely after 12Z with chances decreasing after 18Z. Expecting CIGs to fully clear by late morning with VFR conditions through that evening. SFO Bridge Approach...Similar to SFO. Monterey Bay Terminals...IFR CIGs expected overnight with some potential for LIFR CIGs to develop. Have bumped up stratus arrival to occur by 01Z given more progressive stratus arrival currently visible on satellite. The marine layer is slightly deeper tonight but the current guidance still leans towards IFR to LIFR CIGs tonight. Lower confidence that fog will develop but LAMP guidance indicates it is a possibility (especially after 12Z). Generally looking at conditions improving by late morning with a brief period of VFR conditions during the afternoon. && .MARINE... (Tonight through next Saturday) Issued at 453 PM PDT Mon Jun 1 2026 Light to moderate winds are expected through the night and into Tuesday with easing seas. Strong northerly winds build into late Tuesday, and gale force gusts return in the mid week and last through the rest of the forecast. Seas build by the end of the work week. && .BEACHES... Issued at 1229 AM PDT Mon Jun 1 2026 A Beach Hazards Statement remains in effect today through 5 AM Tuesday morning due to an increased risk for sneaker waves and strong rip currents caused by a long period southwest swell. On the buoys, this swell is being masked by stronger northwest swell waves, but careful analysis of the wave spectrum at the Point Reyes and Point Sur buoys reveals a southwest swell around 1 to 2 feet high with a period of 20 seconds. 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 away 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. && .MTR WATCHES/WARNINGS/ADVISORIES... CA...Beach Hazards Statement through late tonight for CAZ006-505-509- 529-530. PZ...Small Craft Advisory from 3 PM to 9 PM PDT Wednesday for SF Bay N of Bay Bridge. Small Craft Advisory from 3 PM Wednesday to 3 AM PDT Thursday for Mry Bay-Pigeon Pt to Pt Pinos 0-10 nm-Pigeon Pt to Pt Pinos 10-60 NM. Small Craft Advisory from 9 PM Tuesday to 3 PM PDT Wednesday for Pt Arena to Pt Reyes 0-10 nm-Pt Pinos to Pt Piedras Blancas 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm. Gale Watch from Wednesday afternoon through late Wednesday night for Pt Arena to Pt Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM-Pt Pinos to Pt Piedras Blancas 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm. Small Craft Advisory from 3 PM Tuesday to 3 PM PDT Wednesday for Pt Arena to Pt Reyes 10-60 NM. && $$ SHORT TERM...KR LONG TERM....KR AVIATION...Kennedy MARINE...Murdock 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

438 FXUS66 KOTX 012313 AFDOTX Area Forecast Discussion National Weather Service Spokane WA 413 PM PDT Mon Jun 1 2026 .KEY MESSAGES... - Showery conditions for northeast Washington and north Idaho through Tuesday. Best chances for beneficial showers Monday. - Unsettled conditions mid to late next week with another pair of systems. && .SYNOPSIS... Minor impacts are expected this week. A showery regime early this week will be replaced by a warmer and more unstable regime by Wednesday. There is a 10 to 30% chance of thunderstorms across the Inland Northwest Wednesday afternoon and evening. Behind this system, cooler and showery conditions return. && .DISCUSSION... This afternoon through Tuesday: Low pressure centered in Montana will continue to influence the weather, but that influence will gradually wane as the pattern shifts. This afternoon and early evening moisture wrapping around the west side of that low will continue to provide deeper cloud cover and a chance for showers over the eastern third of WA and ID. These may not amount to much more than trace amounts, but a few areas could see a little more (up to 0.05 inches or so). Farther west will be drier with breezy northerly winds and some middle to high clouds. The breezy winds from the Okanogan Valley to the western basin will gust at 15-30 mph. As we head into later this evening and tomorrow the clouds will become more variable and the shower chances linger mainly near the ID/MT border. Winds will decrease. Lows tonight will largely be in the 40s and highs Tuesday will be in the 70s to mid-80s, with the mildest readings over the deeper basin. Wednesday through Monday: Low pressure currently in the Gulf of AK pushes toward the BC coast. This ejects a shortwave across the area Wednesday, bringing more clouds and a chance for showers and t-storms. The first chances start near the Cascades Wednesday and expand eastward later Wednesday afternoon into Wednesday night. Chances will be around 20-50%, lowest in the lee of the Cascades and deeper Basin. Chances then retreat to the mountain zones Thursday, with the continued risk for t-storms in the afternoon. A few of the t-storms could be locally strong both Wednesday and Thursday, but a repeat of last week`s storms is not expected. Brief heavy rain, gusty outflow winds and small hail are possible. This wave will bring additional breezy conditions, focused near the Cascades and western basin. But the eastern basin into the Blue Mountains will also become breezy. Thursday night into Friday looks drier, but the parent Gulf of AK trough starts to move in later Friday into next Monday. This will bring additional shower chances, largely around the mountains. It will also bring additional breezy conditions, particularly Friday and Saturday with gusts of 20-30 mph. We will keep an eye on the combination of winds and lower RH values heading into this period for fire weather concerns, though RH values are in critical areas strictly speaking it is close, especially on Friday. Temperatures are forecast to be in 70s to mid-80s Wednesday, largely 70s Thursday and Friday, upper 60s to mid-70s on the weekend, before warming toward the 70s to lower 80s Monday. Low are largely forecast to be in 40s through Friday morning, with some lower to mid-50s in the deeper basin and L-C Valley. Saturday to Monday lows in the upper 30s to 40s are forecast, with Sunday the coolest morning and perhaps Monday not much milder. Temperatures could be quite cold for anyone heading into the backcountry. There may even be some mid-30s and possible frost in some of the sheltered northern valleys, but it is too early to have much confidence in details. Yet ensembles show the probability of <=30F around 30-60%. So this will need to monitored for anyone with such concerns. /Solveig && .AVIATION... 00Z TAFs: Moisture wrapping around a low to the east has brought a layer of mid to high level clouds over the region with isolated to scattered showers over Northeast WA and North ID. VFR conditions are expected. Precip chances diminish after 02-03Z this evening. Winds will be gusty from the north from KOMK to KMWH and from the northeast from KGEG to Ritzville into the early evening, subsiding overnight. FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: High confidence in VFR conditions for all TAF sites today. A rogue lightning strike can`t be ruled out with the showers this afternoon and early evening, though confidence is low given how weak the instability is. Low confidence on showers impacting TAF sites. ----------------------- 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 45 73 47 78 50 72 / 10 0 0 0 40 10 Coeur d`Alene 46 72 49 78 52 70 / 20 10 0 0 40 20 Pullman 42 72 46 76 48 68 / 10 0 0 0 50 10 Lewiston 50 78 52 82 55 76 / 10 0 0 0 60 20 Colville 40 76 43 79 45 74 / 20 10 0 10 50 40 Sandpoint 45 70 47 76 50 69 / 30 10 0 0 40 30 Kellogg 45 71 47 79 51 69 / 20 10 0 0 50 30 Moses Lake 48 81 52 82 49 79 / 0 0 0 10 20 10 Wenatchee 55 81 57 80 54 77 / 0 0 0 30 20 0 Omak 48 80 53 82 53 79 / 0 0 10 10 20 10 && .OTX WATCHES/WARNINGS/ADVISORIES... WA...None. ID...None. && $$

989 FXUS66 KPDT 012236 AFDPDT Area Forecast Discussion National Weather Service Pendleton OR 336 PM PDT Mon Jun 1 2026 .KEY MESSAGES... - Dry conditions with warming temperatures through Wednesday. Cooler thereafter. - Mountain showers and thunderstorms Wednesday, and again possibly Friday into Saturday. - Breezy to windy conditions Wednesday and again Friday into Saturday. && .DISCUSSION... An upper low continue to spin across Montana and southern Canada. It will gradually move eastward. As it does, the broader trough over the Pacific Nortwest will move as well, and weak ridging will move in for Tuesday. A quick moving trough will then follow for Wednesday. This trough and associated upper level energy will bring a chance of showers, and a low (<20 percent) chance of thunderstorms, mainly to the mountains. Precip chances will continue into early Thursday, mainly for the eastern Oregon mountains. There will also be breezy to windy conditions as the trough moves through with wind gusts 25 to 35 mph with gusts as high as 40 mph in the normally breezy areas. NBM probabilities of wind gusts >=39 mph range between about 40 and 80 percent across the area. A more zonal flow will move in for Thursday, drying things out. Then, an upper low and trough will move into the Pacific Northwest beginning on Friday. While the main upper low will likely move along the Washington/British Columbia border, the broader trough will move through the Pacific Northwest, with a more zonal flow returning Sunday. The main impacts will be showers and possibly thunderstorms over the mountains. Additionally, breezy to windy conditions will develop Friday afternoon over the lower elevations and peak on Saturday. Wind gusts of 35 to 35 mph with gusts to 40 mph are possibly in the normally breezy area...the Cascade gaps, Simcoe Highlands, Columbia Basin and Gorge, and foothills of the Blue Mountains. NBM probabilities of wind gusts >=39 mph range between 40 and 80 percent across this area on Friday, and about 50 and 80 percent on Saturday. && .AVIATION /00Z TAFS THROUGH 00Z WEDNESDAY/... VFR conditions prevail. Winds remain light at less than 12 knots and will be terrain driven at times. No impactful weather expected that will bring low VIS and CIGs. && .Preliminary Point Temps/PoPs... PDT 48 81 50 79 / 0 0 0 0 ALW 52 81 54 81 / 0 0 0 0 PSC 51 85 52 84 / 0 0 0 0 YKM 53 84 54 82 / 0 0 0 20 HRI 50 84 51 82 / 0 0 0 0 ELN 48 79 52 76 / 0 0 0 30 RDM 41 82 49 74 / 0 0 0 10 LGD 44 79 46 79 / 0 0 0 20 GCD 42 83 46 79 / 0 0 0 20 DLS 57 87 60 78 / 0 0 0 0 && .PDT WATCHES/WARNINGS/ADVISORIES... WA...None. OR...None. && $$ DISCUSSION...77 AVIATION...95

194 FXUS65 KREV 012046 AFDREV Area Forecast Discussion National Weather Service Reno NV 146 PM PDT Mon Jun 1 2026 .KEY MESSAGES... * Warm with above average temperatures through Friday, with isolated Moderate HeatRisk for warmer lower valleys. * Isolated shower chances remain low through midweek, with increasing winds Wednesday bringing brief elevated to locally critical fire weather conditions. * Stronger winds and cooler temperatures arrive this weekend, with elevated to locally critical fire weather concerns possible. && .DISCUSSION... Warm this Week: * Weak ridging over CA/NV will keep temperatures above early June averages through Friday. Highs will generally reach the upper 80s to lower 90s for western NV valleys, with upper 70s to near 80 for Sierra communities. Warmest days remain Wednesday and Friday, with isolated Moderate HeatRisk possible for the warmer lower valleys of west-central NV. Isolated Showers and Midweek Winds: * Most areas remain dry through midweek. Low-end shower chances, around 10% or less, continue near Mono County this afternoon and Tuesday, then shift toward far northeast CA and the OR border Wednesday as a weak shortwave brushes the Pacific NW. Winds increase Wednesday afternoon, with the best signal for gusts greater than 35 mph focused along the Sierra Front, northeast CA, western NV, and portions of west-central NV. This may produce areas of elevated fire weather concerns where fuels are receptive. Gusty, Cooler Weekend: * A deeper Pacific trough approaches the West Coast late week into the weekend, bringing another round of increased winds and a cooling trend. Winds may begin to increase Friday, with the stronger wind period still favored Saturday. Fire weather concerns may increase again where fuels remain receptive, but the magnitude and coverage will depend on the eventual trough track, wind strength, and afternoon RH. Shower chances remain low, generally 10% or less, although a slightly wetter trend remains possible by Sunday depending on how far inland the trough moves. Temperatures cool to near or slightly below early June averages by Sunday. -Johnston && .AVIATION... * VFR conditions are expected at the main terminals through Wednesday. The main aviation concern will be increasing afternoon winds, especially Wednesday as W-SW gusts reach 25-30 kt for Sierra Front terminals and near 25 kt at KMMH. Sierra ridge gusts may reach 30-35 kt Wednesday afternoon, producing areas of mountain wave and lee-side turbulence near and east of the Sierra. Periods of LLWS will also be possible. * Winds remain lighter today and Tuesday, with typical afternoon W- NW breezes generally 15-20 kt. Isolated showers remain possible near Mono County today and Tuesday, but chances are 10% or less with low confidence in direct terminal impacts. Brief early morning valley fog near KTRK remains possible, otherwise VFR prevails. -Johnston && .FIRE WEATHER... * Dry and warmer than normal conditions prevail through much of the week outside of low-end shower chances near Mono County this afternoon and Tuesday, then near far northeast CA and the OR border Wednesday. * Elevated fire weather concerns are possible Wednesday afternoon, mainly across western NV, northeast CA, and portions of west- central NV, where the best overlap of gusts over 30 mph and single-digit minimum RH is expected. * A longer period of elevated fire weather conditions is possible Saturday afternoon as a Pacific trough brings stronger winds to the region. The greatest concerns remain focused across western NV and northeast CA. -Johnston && .REV Watches/Warnings/Advisories... NV...None. CA...None. && $$

425 FXUS66 KSTO 011715 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 1015 AM PDT Mon Jun 1 2026 .KEY MESSAGES... -Dry and warming weather this week, with areas of Moderate HeatRisk, low humidity and periodically breezy winds especially late Wednesday into Thursday. -Delta breezes starting Tuesday continuing through the week. && .DISCUSSION... ...Tuesday... Very little changes in the forecast package today. Ensemble output remains very similar so confidence if above normal. An upper level low in the Pacific Northwest will be the main weather impact through the next 7 days. A short wave ridge ahead of this upper low will be in place over the area Tuesday. This will keep temperatures a bit above normal in the mid 90s. ...Wednesday through Friday... A wave of energy will rotate around the PacNW low Wednesday and move across NorCal. This will increase pressure gradient a bit for some gusty winds at times, but humidities look to not get too low and have trended up a bit from yesterday. Thursday this wave pushes off to the east as PacNW low remains and we shift into another short wave ridge pattern for another warm day. Humidities on Thursday will be lowest in the far northern Sac Valley in the teens but winds shouldn`t be too bad so conditions remain below Red Flag Warning criteria. Friday...PacNW upper low begins to slide south reducing heights over the area and increasing westerly flow for some delta flows. ...Saturday into early next week... The upper low slides across the area bringing a cooler day and breezy conditions but dry weather. Eventually Sunday into Monday the upper trough moves off to the east and decreases in strength. There may be a period of north winds in this area but right now Ensemble output suggesting the energy will not dig south and we rather end up with a weaker westerly flow for low impactful weather. WMR WMR && .AVIATION... VFR conditions at TAF sites over the next 24 hours. Surface winds generally at or below 12 kts, except in the Delta vicinity with west-southwest winds 10 to 15 kts with gusts to 20 kts from 23Z Monday through 12Z Tuesday, and then up to 25 kts after 22Z Tuesday. && .STO WATCHES/WARNINGS/ADVISORIES... None. && $$

790 FXUS65 KMSO 011928 AFDMSO Area Forecast Discussion National Weather Service Missoula MT 128 PM MDT Mon Jun 1 2026 .DISCUSSION... KEY MESSAGES: - Through Tuesday: A slow moving weather system will bring prolonged, light to moderate rainfall focused along the Continental Divide and in the Glacier Park region. - River, stream, and creek rises from widespread rain and snow melt will lead to the risk of minor flooding across northwest Montana. - Active weather through the week into next week. The low pressure system will continue to wrap gulf moisture into northwest Montana this afternoon into Tuesday morning. Many areas across northwest Montana particularly east of Highway 93 should expect an additional 0.25 to 1 inch of rainfall by Tuesday afternoon with the higher terrain along the Divide getting up to 2 inches. Snow levels will remain hovering around 7000 feet during this period. An Areal Flood Warning will remain in effect for the Flathead and Mission valleys until tomorrow for the flooding and ponding of water along the western slopes of the Mission and Swan mountain ranges. An Areal Flood Watch remains for the Glacier NP region for the potential of small stream flooding and rock/mud slides. A Flood Watch remains in effect for the Clark Fork river above Missoula as water from upstream makes its way through the region. The Northern Rockies will experience a minor break in the precipitation along with some warming late Tuesday into Wednesday. Then a quick moving disturbance will push through the region on Thursday bringing widespread showers and the potential for a few thunderstorms. Another break in the precipitation is expected for Friday. Then on the weekend a more significant low pressure system makes its way into the Pacific Northwest. The models diverge on how this low pressure system will move across the region Sunday into Monday. The latest guidance is leaning towards the low stretching and splitting into two system with the bulk of the energy going into Canada and a weak feature moving into California. The general consensus is for the Northern Rockies to remain in an active weather pattern this weekend into next week. && .AVIATION... Low pressure east of the Continental Divide is sending moisture west into the Northern Rockies airspace today. The moisture feed is primarily affecting terminals along and north of about I-90 including KMSO. Expect rain to continue at KGPI and KMSO today, while migrating south to KHRF and KBTM later today and overnight while winds region-wide stay northwest or northerly on the backside of the departing low. Decreased visibility and ceiling will drop flight categories to MVFR at times due to rain and mist through Tuesday. Expect terrain to be obscured across all northwest Montana mountain ranges, especially along the Continental Divide. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...Flood Warning through Tuesday morning for Flathead and Mission valley. Flood Watch through Tuesday morning for West Glacier Region. ID...None. && $$

661 FXUS65 KBOI 012332 AFDBOI Area Forecast Discussion National Weather Service Boise ID 532 PM MDT Mon Jun 1 2026 .UPDATE...Updated aviation discussion. && .KEY MESSAGES... - Dry with temperatures warming to around 10 degrees above normal by Wednesday. - Breezy Wednesday and Thursday with shower and thunderstorm potential across the east-central Oregon and west-central Idaho. - Mostly dry through the weekend with temperatures swinging from around 10 degrees above normal on Friday to around 5 degrees below normal by Sunday. && .SHORT TERM /Through Wednesday Night/... Issued 237 PM MDT MON JUN 1 2026 The upper level pattern will transition to a shortwave ridge over the area which will bring dry and warmer weather through Wednesday. Flow aloft will shift to the southwest on Wednesday as a shortwave trough approaches the Pac NW coast. Current modeling tracks the trough along WA/OR border Wednesday afternoon, supporting a 20-30% chance of showers and thunderstorms across SE Oregon and the w-central ID mountains. A lower probability (5-10%) exists for the Snake Plain by Wednesday evening. Gusty southwest winds will shift to the NW behind a cold frontal passage Wednesday afternoon/evening. The shower/storm threat tapers off across SE Oregon Wednesday night, while a low chance remains in the w-central Idaho mtns. Temperatures will warm to around 10 degrees above normal by Wednesday. && .LONG TERM /Thursday through Monday/... Issued 237 PM MDT MON JUN 1 2026 To start Thursday, an upper-level shortwave trough will be moving out of the area to the northeast. Precipitation and cloudy skies may linger through Thursday afternoon in our northern CWA (particularly Valley county), but should move out by evening. Cooler temperatures and breezy daytime winds are expected as the system moves out on Thursday. Temperatures will rebound quickly by 5-10 degrees on Friday as southwesterly flow overspreads the region ahead of a deep upper-level trough moving into the Pacific NW. As the weekend progresses, the upper-level low will gradually move across the Southern Canadian provinces / International border. For our area, winds will remain breezy as an accompanying cold front approaches the area. Latest model runs depict the cold frontal passage on Saturday for E Oregon and SW Idaho, increasing shower/thunderstorm chances (15-30%) across northeast Oregon and the central Idaho mountains over the weekend. Temperatures will cool several degrees for Saturday, but further cooling is anticipated Sunday as the trough moves overhead. Gusty winds will persist Sunday from the traversing trough, but should decrease by Sunday night. Drier and warmer conditions are likely to return Monday as the trough weakens and departs toward the east. && .AVIATION /00Z Tuesday through Wednesday/... Issued 525 PM MDT MON JUN 1 2026 VFR. High clouds moving in from the north this evening. Surface winds: Variable overnight, becoming W to NW 5-10 kt Tuesday afternoon. Winds aloft at 10kft MSL: westerly 10-20 kt. KBOI...VFR and high clouds. Surface winds: NW 6-12 kt this evening, becoming SE around 5 kt overnight. && .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 AVIATION.....JR SHORT TERM...DG LONG TERM....CH

258 FXUS65 KLKN 011942 AFDLKN Area Forecast Discussion National Weather Service Elko NV 1242 PM PDT Mon Jun 1 2026 .KEY MESSAGES... * Warming trend continues through Friday * Dry weather will persist into the weekend * Stronger winds possible Saturday, and combined with low minimum relative humidity values, will lead to elevated to critical fire weather conditions in the afternoon. && .DISCUSSION... (This evening through next Sunday) WEATHER PATTERN OVERVIEW: A few echoes can be seen on radar this afternoon though no precipitation has been noted on remote observation platforms. For tonight, expect mostly sunny skies over the region with mostly light winds. Overnight lows will be in the 30s and 40s. A mainly west to east flow will take shape across northern and central Nevada through roughly Friday, with a minor variance on flow Thursday. This will mean fairly quiet weather conditions will persist across northern and central Nevada through this period. Highs will warm to above normal levels at all locations with readings in the 80s and 90s. There is a weak trough passage expected Thursday, which will bring a few degrees of cooling for the afternoon but no precipitation is expected at this time. Highs Thursday afternoon will be in the 70s and 80s. Overnight lows will be in the 30s and 40s. By late week, a strong upper level low will begin to make its way into the Pacific northwest states. While the bulk of the system will remain to the north of the area, the resulting tightening of the pressure gradient will bring about an increase wind speeds across the area Saturday. Future scrutiny of model runs will be required to check for the possibility of wind and fire weather headlines for the upcoming weekend. Highs Friday and Saturday will be in the 80s and 90s with lows in the 40s and 50s. FORECAST CONFIDENCE & DEVIATIONS: Had to add in low end pops and weather across the northern tier and east-central sections of the forecast area for today due to weak instability, low level convergence, and limited moisture in the low to mid levels. No other changes were made to the NBM forecast. Confidence is low in coverage and timing of afternoon sprinkles/storms today. Confidence is high with regards to increasingly warm temperatures through the week with dry conditions. Confidence is low in elevated to critical fire conditions for Saturday. && .AVIATION... VFR conditions are expected at all terminals through at least the next 24 hours. No precipitation is anticipated through the forecast period. Winds will occasionally be breezy with afternoon gusts to 20KT. && .FIRE WEATHER... Conditions are expected to remain on the dry side across Northern and Central Nevada through the upcoming week. Winds will be light, with occasional afternoon gusts to 20 mph through mid-week, with winds becoming more breezy with gusts to 25 mph. Minimum relative humidity values will be in the single digit to low teen range each afternoon with highs warming to well above normal levels by mid- week. By Saturday, winds and minimum relative humidity values will be elevated to critical and will need to be watched closely. && .LKN Watches/Warnings/Advisories... None. && $$ DISCUSSION...86 AVIATION...86 FIRE WEATHER...86