914 FXUS66 KSEW 310243 AFDSEW Area Forecast Discussion National Weather Service Seattle WA 743 PM PDT Sat May 30 2026 .SYNOPSIS... An upper level ridge will slowly build across the Pacific Northwest this weekend, resulting in a gradual warming trend into early next week. Temperatures will peak on Tuesday, resulting in Minor to Moderate HeatRisk. Onshore flow will increase Wednesday with upper troughing approaching Western Washington late in the week. && .SHORT TERM /TONIGHT THROUGH MONDAY NIGHT/... No evening updates for the short/long term discussions. -HPR A mix of clouds and sunshine this afternoon with continued weak onshore flow across Western Washington. Temperatures remain relatively cool today, with highs in the upper 50s to mid 60s. Upper level ridging will gradual build into Western Washington beginning Sunday and continuing into early next week. This will result in a warming trend across the area. Highs on Sunday will peak in the 60s to low 70s, with Monday afternoon temperatures reaching the 70s, with low 80s south of Olympia and near interior Grays Harbor County. An upper level low located over Montana on Monday will also spread high clouds into Western Washington, particularly during the afternoon. && .LONG TERM /TUESDAY THROUGH SATURDAY/... The upper ridge will remain situated over Western Washington on Tuesday before the ridge begins to flatten midweek. A brief thermal trough will build into the region on Tuesday, which results in Tuesday being the warmest day of the week with light offshore flow. Widespread highs in the upper 70s to mid 80s are expected. The potential for low 90s Tuesday afternoon will also exist from Olympia southwards and into interior Grays Harbor and Mason Counties. Widespread Minor to Moderate HeatRisk will exist on Tuesday. Despite the warm air temperatures, rivers and lakes remain cold. If you`re heading out on the water, always wear a life jacket and take precautions for the cold water. In addition to the warm temperatures, daytime RH values will dip between 20 to 30% with light east flow - see fire weather section for more details. Ensembles are generally consistent in the upper ridge slowly flattening by Wednesday, resulting in increasing onshore flow. Temperatures will cool by midweek, with forecast high temperatures on Wednesday in the 60s and 70s. Onshore flow will continue on Thursday. Ensembles begin to show a deeper trough developing across British Columbia by late next week into the following weekend. There is a notable uptick in POPs by late Friday into Saturday with the upper troughing, in addition to cooler temperatures next weekend. JD && .AVIATION... Upper level troughing over the northeastern Pacific will maintain southwesterly flow aloft tonight before becoming more westerly by early Sunday morning. Northwesterly flow aloft is expected to be in place by Sunday afternoon as an upper level ridge starts to build offshore. Onshore flow continues in the low levels with surface winds speeds generally ranging 5-10 kts for the TAF period. VFR conditions in place over W WA this early evening and while there may be some increase in mid-level cloudiness in some spots tonight and early Sunday morning, cloud bases expected to remain well within VFR thresholds with minimal impact to terminals expected. Any increase in cloud cover will diminish into the day Sunday as upper level ridging becomes a greater influence over the area. KSEA...VFR conditions with scattered clouds between 6000-7000 ft for the TAF period.Some additional cloudiness possible at the terminal Sunday morning before clearing again by afternoon. Northerly winds 5- 10 kt for the period, although speeds in the overnight and early morning hours are more likely to inhabit the lower end of that range. North to northwesterly winds increase to 8-12 kt Sunday afternoon. 14/18 && .MARINE... Small craft advisory strength westerlies will persist across the central and eastern Strait of Juan de Fuca tonight into early Sunday morning before easing. The increased onshore flow will also bring gusty northwesterly winds to 25 kt to Admiralty Inlet at times tonight. Winds will then ease across the majority of the area waters on Sunday as high pressure builds across the coastal waters, though portions of the coastal waters will see an increase of northwesterly winds which could approach small craft criteria at times Sunday afternoon and evening. This pattern will also allow for waves to rise and steepen to 7-9 ft at a period of around 7-9 seconds. Winds will gradually ease and waves will subside towards 5-7 ft heading into Monday as high pressure weakens over the region. A thermal trough then looks to develop along the coast Monday night into Tuesday, which will bring a brief period of offshore flow to the area waters- but will not be strong enough to have any significant marine impacts. A frontal system will then move across the area waters Wednesday into Thursday, resulting in the return of onshore flow. Additional headlines will be likely for the central and eastern Strait of Juan de Fuca as onshore flow increases Wednesday night. Seas will primarily range between 6-8 ft. 14 && .FIRE WEATHER... An upper ridge will result in a drier pattern Monday and Tuesday with maximum temperatures reaching the 80s (and a few spots in the low 90s) by Tuesday. Light offshore flow is expected late Monday into Tuesday as a brief thermal trough develops. At this time, winds are not expected to be strong, however, a few locations within the Cascades could see gusts in excess of 20 MPH. In addition, minimum RH values will lower into the 20 to 35 percent range for most locations away from the water. However, this stretch of warm, dry conditions will be short-lived as onshore flow resumes by Wednesday bringing higher RHs for the second half of the week. && .HYDROLOGY... The daily hydrology discussion has ended until the start of the next rainy season; it will only be updated during this time as needed. && .SEW WATCHES/WARNINGS/ADVISORIES... WA...None. PZ...Small Craft Advisory until 7 AM PDT Sunday for Central U.S. Waters Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca. Small Craft Advisory until 5 AM PDT Sunday for Admiralty Inlet. && $$

487 FXUS66 KPQR 310533 AFDPQR Area Forecast Discussion National Weather Service Portland OR 1033 PM PDT Sat May 30 2026 .UPDATED AVIATION DISCUSSION... && .SYNOPSIS...Dry conditions and seasonable temperatures with north to northwesterly winds expected through Sunday. A warming trend expected early next week, with Moderate HeatRisk likely on Tuesday for many urban areas as there is around a 50% chance of exceeding 90 degrees. Temperatures cool again to near or slightly above average by Wednesday as high pressure shifts east. Chances for rain remain low (less than 10%) through Thursday before increasing late next week into next Saturday. && .SHORT TERM...Now through Tuesday night...Water vapor satellite imagery this afternoon reveals upper level troughing extending from the Gulf of Alaska into the Pacific Northwest. At the same time, surface high pressure remains strong over the NE Pacific centered well offshore off the northern CA coast, while lower level ridging maintains onshore northwesterly flow. This overall set-up for today will maintain seasonably cool and dry conditions with shallow cumulus this afternoon across the forecast area. With skies becoming mostly clear tonight, expect another round of cool temperatures overnight into early Sunday morning. Minimum temperatures in the Upper Hood River Valley near Parkdale are expected to be similar to last night, falling to around 36-38 degrees, while a few rural inland locations may also dip into the upper 30s, including northern Clark County, Coast Range valleys, including Vernonia and Grand Ronde, as well as pockets within the central and southern Willamette Valley. Confidence for widespread frost is low. Similar conditions into Sunday, except lower level flow turning more northerly as high pressure over the NE Pacific builds northward, allowing for slightly drier and warmer conditions across the area. With plenty of sunshine on Sunday, expect afternoon temperatures to increase around 3-6 degrees warmer than today, as the final day of May returns to seasonably average temperatures. Also expect diurnally induced northerly winds to become breezy by late afternoon, with gusts up to 25-30 mph along the coast and 20-25 mph inland. Will see warmer temperatures as the calendar changes to June. By Monday, upper level ridging attempts to amplify just offshore, while ensembles show the upper level troughing pinching off into a weak cut-off low over western Montana. This should keep the potential for the hottest temperatures at bay on Monday, but the warming trend is expected to continue into Tuesday. Light offshore flow develops early Monday while 850 mb temps warm to around 12-14C by Monday afternoon. Expect afternoon temperatures to jump into the lower to potentially mid-80s inland, while coastal locations may see high temps into the mid 60s to near 70 degrees, before the seabreeze moderates temps a bit. The latest NBM guidance continues to show ~5 degree spread between the 25th and 75th percentile for the Portland/Vancouver metro (81-86F). There is around a 10-20% chance that some locations within the metro reach 90 degrees, including the Beaverton to Wilsonville corridor, as well as in the Clackamas area. Tuesday is still expected to be the warmest day this week as the upper low shifts northeast into Canada and upper shortwave ridging moves onshore across the PacNW. 850 mb temps peak at around 13-16C allowing for afternoon temperatures inland to warm into the mid-80s to potentially the lower-90s. Latest probs suggest there is around a 40-60% chance of exceeding 90 degrees along the I-5 corridor from Castle Rock, WA south to Salem. A Moderate HeatRisk is likely (60- 80% chance) for Tuesday within the greater Portland/Vancouver Metro area, which means those without access to sufficient cooling and hydration may be impacted by the heat. Therefore, take precautions on Tuesday if participating in outdoor activities, especially during peak afternoon heating. The heat is not expected to last long, though as a decent marine push is expected by later Tue evening ahead of an upper shortwave trough. /DH .LONG TERM...Wednesday through Saturday...There is relatively high confidence that temperatures cool back into the 70s on Wednesday and persist through the end of the week, remaining near to slightly above average temps for early June. Models and their ensembles are in fairly good agreement that a low pressure system in the NE Pacific weakens as it moves toward the Gulf of Alaska on Wednesday. An associated frontal band well ahead of the surface low will approach the coast, but guidance continues to trend down with much, if any, precipitation spreading inland. In fact, NBM guidance generally shows less than a 10% chance of rain through Thursday. But, there remain a handful of ensemble members that do show some QPF, so we cannot rule out some precipitation yet. Uncertainty in the forecast increases late next week as cluster mean analysis shows varying degrees of troughing offshore, leading to increasing chances for precipitation later Friday into Saturday. /DH && .AVIATION...VFR conditions generally persist tonight into Sunday morning at all terminals as the flow aloft turns northerly. However, we`ll have to watch some low clouds shown by satellite (as of 05-06z) building along the west flanks of the Cascades. These have to potential to shift towards I-5/The Portland Metro during the 12-17z period Sunday morning before dissipating with a 15-25% chance for MVFR conditions at KPDX/KUAO and a 30-40% chance a KTTD. Otherwise, higher confidence in VFR conditions the remainder of the forecast period. Winds along the coast and in the central/southern Willamette Valley increase as Sunday progresses with gusts around 20-25 knots possible. KPDX AND APPROACHES...VFR conditions are favored through the TAF period with persistent northwesterly winds. These winds likely increase around 17-19z Sunday with occasional gusts around 18-20 knots in the afternoon. It`s worth noting there is a 15-20% chance for MVFR cigs between 12-17z Sunday morning as clouds slosh towards the terminal from the east - something to watch. -99 && .MARINE...High pressure builds through the weekend which will lead to a typical summer like pattern through the weekend. High pressure will start to move eastward tonight and through Sunday, which will result in increasing north/northwesterly winds across all waters. Gusts up to 25 kt are expected across zones PZZ272, PZZ252, PZZ271 and PZZ251. Gusts up to 30 kt are expected in zones PZZ273 and PZZ253, with a 15-25% chance for gusts up to 35 kt. Therefore have issued a series of Small Craft Advisories across all waters starting late Sunday morning in our southern waters and spreading northward through the early afternoon. Seas 6 to 8 ft expected through the weekend. The ridge continues to shift eastward and intensify through Tuesday but overall will have minimal impact to the marine environment. By Monday, conditions are expected to be below Small Craft Advisory thresholds across all waters. A pattern change expected on Wednesday as a series of systems look to dive down out of the northeastern Pacific through the latter part of next week, but minimal impacts are expected with these systems at this time. /42 && .PQR WATCHES/WARNINGS/ADVISORIES... OR...None. WA...None. PZ...Small Craft Advisory from 2 PM Sunday to 2 AM PDT Monday for PZZ251-252. Small Craft Advisory from 11 AM Sunday to 2 AM PDT Monday for PZZ253. Small Craft Advisory from 5 PM Sunday to 2 AM PDT Monday for PZZ271. Small Craft Advisory from 2 PM Sunday to 9 AM PDT Monday for PZZ272. Small Craft Advisory from 11 AM Sunday to 9 AM PDT Monday for PZZ273. && $$ www.weather.gov/portland Interact with us via social media: www.facebook.com/NWSPortland x.com/NWSPortland

726 FXUS66 KMFR 310506 AFDMFR Area Forecast Discussion National Weather Service Medford OR 1006 PM PDT Sat May 30 2026 ...Updated Aviation Discussion... .DISCUSSION... Plenty of cumulus clouds are still around this afternoon as we transition to a more zonal flow pattern with some short waves traversing the forecast area. This will result in a low chance of showers in northern California today. A thunderstorm is not out of the question, although the probability is less than 10% based on the latest HREF lightning probabilities. With a little more clearing tonight, temperatures should actually drop into the lower 40`s west of the Cascades and lower 30`s east of the Cascades. Those overnight low temperatures were warmer last night because of the cloud cover, although that shouldn`t be a problem tonight. We`ll begin the gradual warm up on Sunday as highs push about 5 degrees warmer compared to today. No weather impacts are anticipated as high pressure begins to build. By Sunday night, a short wave links up with another wave in the northern Rockies and becomes briefly cutoff. We will see light east flow develop over the higher terrain Sunday night and that will warm us up further Monday into Tuesday. One could also analyze a weak thermal trough on Monday through Tuesday. Temperatures along the coast will warm notably on Monday with highs in the upper to mid 70`s near Brookings. By Wednesday afternoon or evening, another upper level wave will arrive along the Oregon coast. Models are predicting spotty showers and perhaps a few thunderstorms in the region. It looks like the best chances will be east of the Cascades Wednesday afternoon. There is still variance in the ensemble forecasts, specifically the amount of precipitation. It`s worth noting about 15% of ENS ensemble members have no precipitation over all of Oregon on Wednesday, so it could still be a very dry day even with this wave moving onshore. Between Thursday and Saturday, the flow pattern looks zonal and still very progressive with another trough arriving around Saturday evening of next week. The models look fairly wet and the PoP forecast is around 20 to 40 percent for the coast and areas around the Umpqua Valley. The PoP drops off notably farther to the south and east during the day. The thunderstorm threat comes to mind Saturday afternoon and evening, although the convective available potential energy(CAPE) looks fairly low on the ensembles. It will be something to watch in future forecasts. && .AVIATION...31/06Z TAFs...VFR should prevail for most locations into Sunday morning, but some patchy IFR ceilings are possible in the Umpqua and Coquille Basins late tonight and early Sunday between 09- 16z. Saturday afternoon and evening, expect VFR conditions areawide. Afternoon/evening breezes will be fairly typical, and strongest along the coast where peak winds in the 25-30 kt range are expected. && .MARINE...Updated 1200 PM PDT Saturday, May 30, 2026...A thermal trough pattern will maintain gusty north winds and steep to very steep seas into Monday. For today, hazardous conditions are expected south of Cape Blanco, with very steep seas expected south of Pistol River. North winds will peak Sunday afternoon and evening, reaching gales from Gold Beach southward and beyond 2 nm from shore. This will also bring worsening conditions north of Cape Blanco, with conditions hazardous to small craft expected for all areas and very steep seas expected from Bandon southward. Winds ease some Sunday night and even moreso on Monday, but steep to very steep seas are likely to continue through Monday. Conditions improve for all areas by Tuesday as the thermal trough pushes inland and north winds weaken below advisory levels. Below advisory conditions likely persist through the remainder of the week with a low west-northwest persistent swell. /BR-y && .MFR WATCHES/WARNINGS/ADVISORIES... OR...CA...None. PACIFIC COASTAL WATERS...Small Craft Advisory until 11 PM PDT Sunday for PZZ356. Small Craft Advisory from 11 AM to 11 PM PDT Sunday for PZZ350- 370. Hazardous Seas Warning until 11 AM PDT Sunday for PZZ356-370- 376. Gale Warning from 11 AM to 11 PM PDT Sunday for PZZ356-376. Small Craft Advisory until 11 AM PDT Sunday for PZZ376. && $$

285 FXUS66 KEKA 302231 AFDEKA AREA FORECAST DISCUSSION National Weather Service Eureka CA 331 PM PDT Sat May 30 2026 .SYNOPSIS...High pressure building into the area this weekend is expected to bring breezy winds, mainly clear skies and warming inland temperatures. Most areas areas are expected to see temperatures peak on Monday with the coastal and near coastal areas seeing a return of the marine influence Tuesday. Gradual cooling is expected through the end of the week. && .KEY MESSAGES... -Breezy winds at the coast this weekend. -Warmer and drier conditions build Sunday through early this week. -Gradual cooling and return of the marine layer late in the week. .DISCUSSION...A series of weak weather systems moving through the zonal flow brought some lingering clouds this morning and continued below normal temperatures for the afternoon. Tonight and Sunday high pressure starts to build into the area. Breezy northwest winds are expected along the coast this evening. This will bring some offshore flow Sunday morning. It looks like this will be strong enough to keep the coastal clouds away, but it is possible a few will linger, most likely in the Eel River Valley. Sunday afternoon inland high temperatures are expected to be nearly 10 degrees above Saturday to around the mid 80s in the warmer valleys. Skies are expected to be mostly clear at the coast, however it isn`t expected to warm up much with 10 to 20 mph northerly winds. Sunday night into Monday the offshore flow continues, especially in the north. This should keep the coast mostly clear. Additional warming is expected Monday with highs warming into the upper 80s to low 90s. Monday night into Tuesday morning the models are starting to indicate a return of the coastal low clouds. This is due to a shortwave approaching the Pacific Northwest. It is possible these clouds will hold off until Tuesday evening, but for now the winds look to be much lighter Monday night allowing stratus to form. Tuesday the marine clouds will likely clear out in the afternoon, but the marine air is still expected to make it into the western half or two thirds of Mendocino, Humboldt and Del Norte counties cooling temperature by several degrees. Farther inland temperatures may continue warming be a few degrees. Late in the week the ensembles are in general agreement that an upper level trough will approach the area. The clusters show some discrepancies on the strength and timing. The fastest and deepest cluster brings some light rain to the area on Saturday while the rest of them keep it farther to the north. The NBM shows a 10 to 30 percent chance of a tenth of an inch in northern Humboldt and Del Norte counties on the next weekend. MKK && .AVIATION...An aggressive erosion of stratus and cloud cover has the coastal terminals in VFR. Gusty northerlies have picked up as of 21z, helping scatter and clear out the previous overcast conditions. Although HREF does have low level cloud cover, likely ground fog with some stratus returning to Humboldt Bay and south up the Eel river delta, there is low probability for cloud coverage returning in heavy doses until late Monday night or early Tuesday morning for KCEC and KACV. Ceilings below 500ft overnight into Sunday are around 35% probability. Stout northerlies lasting through the evening tonight, easing off by 06z and veering southerly until dawn Sunday. Prevailing VFR conditions expected at KUKI with northerlies under 10kts easing to variable and light winds by 05-06z. /EYS && .MARINE...Northerly winds are building in the outer waters, validating Gale Warnings issued from the previous shift. Wind waves and swell out of the NW could bring significant wave heights up tonight in excess of 10 ft, lasting through Sunday with the WNW swell around 15 seconds decaying slightly. Gale warnings in the outer waters through Sunday evening as the gradient of upstream ridge steepens. Strong winds will push closer to shore each afternoon and evening. /EYS && .EKA WATCHES/WARNINGS/ADVISORIES... CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until 3 AM PDT Monday for PZZ450-455. Small Craft Advisory until 8 PM PDT this evening for PZZ470. Gale Warning from 8 PM this evening to 3 AM PDT Monday for PZZ470. Small Craft Advisory until 2 PM PDT this afternoon for PZZ475. Gale Warning from 2 PM this afternoon to 9 PM PDT Sunday 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

429 FXUS66 KMTR 310708 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 1208 AM PDT Sun May 31 2026 ...New BEACHES... .KEY MESSAGES... Updated at 1201 AM PDT Sun May 31 2026 - Long period southwest swell will result in an increased risk of sneaker waves and rip currents through Tuesday morning - Today`s temperatures will be near or slightly above normal - Monday will be the warmest day of the week - Slightly cooler temperatures for the end of the work week into next weekend && .SHORT TERM... Issued at 1005 PM PDT Sat May 30 2026 (Today and tonight) Weak ridging stalls offshore for most of today before amplifying somewhat to our north tonight, setting the stage for a brief jump in temperatures on Monday. Before that, we will see a notable increase of around 5 degrees from Saturdays highs. Interior locations in the North Bay Valleys, South Bay, East Bay Hills and Salinas Valley south of Soledad have the best chance (60%-100%) of reaching 80 degrees, with the remainder of the interior away from coastal influences in the 70s, and 60s for coastal areas. Marine layer will struggle to make much progress beyond the immediate coast into the beginning of the week. && .LONG TERM... Issued at 1005 PM PDT Sat May 30 2026 (Monday through Saturday) Expect another jump around 5-10 degrees on Monday across the interior with another day of relatively unimpressive amplification of the ridge and weak, unorganized jet stream flow at H30. Split upper flow regime through the middle of the week will keep temperatures similar Tuesday through Thursday. The potential cool down expected for the end of the week into next weekend continues to evolve with deterministic guidance now backing off the deeper troughing advertised the past couple of days. The net result would be closer to normal temperatures, and more pleasant weather and dry conditions through the extended forecast. && .AVIATION... (06Z TAFS) Issued at 929 PM PDT Sat May 30 2026 A mix of clear skies and coastal stratus tonight. HAF, MRY, SNS, SFO, and OAK are the ones to watch, listed in order of decreasing probabilities. Moderate onshore winds will decrease overnight before returning Sunday afternoon. Vicinity of SFO...The terminal remains VFR, although a patch of stratus is developing over the Peninsula. The strong onshore winds are gradually decreasing, but held on longer than I thought they would. The probability for ceilings Sunday morning is around 40%, but the window is short enough to capture in a TEMPO group. The afternoon will almost certainly be clear as the onshore winds return. SFO Bridge Approach...Similar to SFO. Monterey Bay Terminals...MRY just developed a ceiling out of nowhere. I expected that to happen tonight, but not this early. I`m not sure that this first cloud will survive the night, so I`m keeping the first few hours of the TAF VFR for now. && .MARINE... (Tonight through next Friday) Issued at 929 PM PDT Sat May 30 2026 High end small craft advisories are in effect, with buoys reporting occasional gusts to gale force. A fresh northerly breeze will continue through Sunday. Seas will build in response and become rough leading to hazardous conditions over the coastal waters through Sunday and into Monday morning. && .BEACHES... Issued at 1201 AM PDT Sun May 31 2026 A Beach Hazards Statement will come into effect at 5 AM today through Tuesday morning due to an increased risk of sneaker waves and rip currents. Long period southwest swell is approaching the Pacific coast, with periods of 18 to 20 seconds and a height of around 2 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. DialH && .MTR WATCHES/WARNINGS/ADVISORIES... CA...Beach Hazards Statement from 5 AM PDT early this morning through late Monday night for CAZ006-505-509-529-530. PZ...Small Craft Advisory until 3 AM PDT Monday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 0-10 nm-Pt Pinos to Pt Piedras Blancas 0-10 nm. Small Craft Advisory until 3 AM PDT early this morning for Pigeon Pt to Pt Pinos 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm. Small Craft Advisory until 9 AM PDT Monday for Pt Arena to Pt Reyes 10-60 NM. && $$ SHORT TERM...JM LONG TERM....JM AVIATION...Flynn MARINE...Flynn 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

804 FXUS66 KOTX 310549 AFDOTX Area Forecast Discussion National Weather Service Spokane WA 1049 PM PDT Sat May 30 2026 .KEY MESSAGES... - Drier conditions into early next week, with a chance of showers limited to mainly the Idaho Panhandle and Northeast Washington. - Unsettled conditions mid to late next week with another pair of systems. && .SYNOPSIS... Drier and cooler conditions are expected over the weekend with breezy conditions. Temperatures warm through the week with a return of a chance of showers and thunderstorms on Wednesday. && .DISCUSSION... Today: Today is cool with temperatures in the low 60s to mid 70s with breezy winds in the Cascade gaps. The surface pressure gradients for Portland to Kalispell and Seattle to Wenatchee have steadily increased through the morning and early afternoon thanks to strengthening surface high pressure west of the Cascades. The wind speed at Wenatchee has slowly decreased through the morning and early afternoon thanks to countering upvalley flow, but that will change this evening as local flow reverses downslope aligning with the pressure gradient. There is a 50-80% chance for 30+ mph gusts through 2 AM at Wenatchee, Entiat, Chelan, George, and Ephrata. Sunday through Tuesday: A warming trend will commence to start Sunday Height rises from a blocking high in western British Columbia will lead to warming temperatures into the 70s and 80s by Tuesday. A weak upper low loitering over MT will bring unsettled conditions to the northern ID Panhandle and at times northeast Washington through Tuesday. The best chance for showers and perhaps a lightning strike or two would be Monday afternoon as a vort max pivots west from western Alberta into southeast BC and eventually north ID. From Sunday afternoon to Tuesday afternoon there is a 10-20% chance for an additional quarter inch of rain at Kellogg and Sandpoint. Those chances increase to 40% at Bonners Ferry. Wednesday through Saturday: The next wave arrives Wednesday which will bring more chances for showers and isolated thunderstorms. Forecast instability looks fairly unimpressive around 100-300 J/kg so not expecting severe weather at this time. Behind this wave, models are in generally good agreement of strengthening zonal flow ahead of another trough. This trough will bring another round of unsettled conditions late next week. DB && .AVIATION... 06Z TAFs: VFR conditions will prevail with breezy westerly winds. Winds across the Cascade gaps into the Columbia Basin have relaxed. They`ll pick up again around 10-15Z, though they`ll be lower this time, 10-15kts. Winds will gradually decrease Sunday afternoon. FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: High confidence in VFR conditions for all TAF sites through the weekend. ----------------------- 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 71 47 70 46 73 / 0 0 0 10 0 0 Coeur d`Alene 46 67 48 67 47 71 / 0 0 10 20 10 0 Pullman 41 65 43 68 44 72 / 0 0 0 10 0 0 Lewiston 47 72 49 75 51 79 / 0 0 0 0 0 0 Colville 41 73 42 70 40 74 / 0 0 10 40 10 0 Sandpoint 45 65 46 64 45 68 / 0 10 20 50 20 20 Kellogg 45 64 46 67 46 71 / 0 0 10 20 10 10 Moses Lake 42 76 47 78 49 81 / 0 0 0 0 0 0 Wenatchee 48 76 53 78 57 81 / 0 0 0 0 0 0 Omak 46 76 50 75 50 78 / 0 0 0 0 0 0 && .OTX WATCHES/WARNINGS/ADVISORIES... WA...None. ID...None. && $$

738 FXUS66 KPDT 310444 AFDPDT Area Forecast Discussion National Weather Service Pendleton OR 944 PM PDT Sat May 30 2026 .KEY MESSAGES... - Warming temperatures through midweek. - Dry conditions for much of the week, with the potential for mainly mountain showers and thunderstorms around midweek. && .DISCUSSION... A more zonal flow is expected to develop over the region as an upper low over the northern Rockies moves northeast. By Sunday, a weak upper low will move over the area, but is expected to be dry. This low will then help carve out a broader trough that will shift eastward with the upper low moving to northern Montana/southern Canada by Monday night. Can`t rule out a passing shower with the low, especially over the mountains, but overall chances are low (<20 percent). As this low spins to the northeast, weak ridging will build in for Tuesday. A weak trough and some shortwave energy will then move across the region Wednesday into Thursday. With this feature will come the best chances for precipitation and thunderstorms in the next 7 days. Thunderstorm chances, although low (<20 percent) look to be highest over the mountains of central and eastern Oregon). Dry and a bit cooler weather returns for Thursday and Friday. By Saturday, precipitation may start to return, especially to the Cascades as an upper low off the coast approaches the region. There is still some uncertainty with the timing of this system, and we are a week away but it will bear watching. Additionally, depending on the track and timing, winds may begin to increase as early as Friday, or into Saturday across portions of the area. && .AVIATION /06Z TAFS THROUGH 06Z MONDAY/... Regional satellite imagery showed clear sky other than some high level thin clouds over PSC/ALW/PDT, with no impacts to terminals. Breezy winds with gusts around 20 knots will continue though around 10z at YKM and DLS, but are expected to be below 12 knots elsewhere. && .Preliminary Point Temps/PoPs... PDT 42 71 45 76 / 0 0 0 0 ALW 47 72 50 76 / 0 0 0 0 PSC 43 77 48 80 / 0 0 0 0 YKM 42 77 48 80 / 0 0 0 0 HRI 43 75 47 79 / 0 0 0 0 ELN 39 71 45 75 / 0 0 0 0 RDM 29 67 34 73 / 0 0 0 0 LGD 37 68 41 72 / 0 0 0 0 GCD 34 70 37 75 / 0 0 0 0 DLS 45 76 49 83 / 0 0 0 0 && .PDT WATCHES/WARNINGS/ADVISORIES... WA...None. OR...None. && $$ DISCUSSION...77 AVIATION...71

671 FXUS65 KREV 301922 AFDREV Area Forecast Discussion National Weather Service Reno NV 1222 PM PDT Sat May 30 2026 .KEY MESSAGES... * A slight chance (10%) of showers and isolated thunderstorms across NE California and NW Nevada this afternoon, with similar chances areawide Sunday. * Fog development for fog-prone Sierra valleys again tonight through tomorrow morning. * Above normal temperatures prevail next week with cooler, unsettled weather possible next weekend. && .DISCUSSION... Hi-res models are having difficulty resolving the location for showers and thunderstorms today. Some show isolated showers across the Sierra and Sierra Front while the HRRR and RRFS want to highlight NE CA and central Washoe into Pershing county. 12Z model sounding values show very little CAPE again this morning; cumulus buildups will be likely along the higher terrain, though may have difficulty with deeper vertical development. Light rain out of any showers that develop will be most likely in NE CA near Susanville. Thunderstorm chances for the same area remain 10% or less. Forecasted sky conditions have us clearing out again tonight, which will be conducive to fog development in and around Truckee and the Martis Valley. Fog stayed persistent until about 9:30 this morning, so expect fog to linger well past sunrise again tomorrow morning. Drivers should prepare for limited visibilities and slick roadways. CAM guidance and model soundings hint at shower and thunderstorm potential Sunday. MUCAPE values increase in a south to north fashion from Mammoth (~150 J/kg), through the Sierra Front (~250-300 J/kg), and into NE CA and northern Washoe (~450 J/kg). Soundings currently show inverted-V profiles but the shortwave to our north may bring in mid level dry air, which would inhibit any shower and thunderstorm development. Deeper cumulus buildups are likely from the higher CAPE values, though confidence in significant impacts from showers and storms that develop remains low. A warming and drying trend is on tap through at least mid next week with temperatures reaching the upper 80s and 70s for W NV valleys and Sierra communities, respectively. As of now, there is a ~30% chance to hit 90F in Reno Wednesday and Thursday. Long range guidance shows additional disturbances next week as well, which may bring increased afternoon breezes Wednesday. After that, a pattern change is likely by next weekend, bringing chances for showers and thunderstorms. Stay tuned as we get closer! -Giralte && .AVIATION... VFR conditions expected for all terminals today. The only exception will be for KTRK and KTVL where FG development will drop CIGS/VIS down to IFR/LIFR conditions from 09-16Z. Low chances (10-15%) for showers and thunderstorms today, though low cloud development will result in mountain obscurations this afternoon. -Giralte && .REV Watches/Warnings/Advisories... NV...None. CA...None. && $$

490 FXUS66 KSTO 301907 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 1207 PM PDT Sat May 30 2026 .KEY MESSAGES... -Slight chance for mountain showers or an isolated t-storm over the higher elevations of the southern Cascades, Shasta County mountains and Burney Basin this afternoon -Drier and warmer weather Sunday with period of increased northerly flow in the morning -Dry and warming weather next week, with areas of Moderate HeatRisk, low humidity and periodically breezy onshore flow && .DISCUSSION... ...Today through Sunday... Current GOES-West satellite imagery shows cumulus clouds across much of interior northern California on this Saturday afternoon. Temperatures are trending approximately 10 to 20 degrees warmer than this time yesterday afternoon. Forecast highs will be in the 70s to 80s today in the Valley and foothills, and 50s to 70s in the mountians. The warming trend will continue on Sunday with highs in the 60s to upper 80s across the forecast area. Isolated showers or a thunderstorm will be possible this afternoon over the Shasta County mountains, Burney Basin and southern Cascades (10 to 15 percent chance), with dry conditions elsewhere. A brief period of increased northerly flow will develop Sunday morning, with gusts of 15 to 20 mph mainly in the northern and central Sacramento Valley. Winds are forecast to peak in the early to mid morning hours before decreasing through the day. ...Monday through Friday... Dry weather and above normal temperatures can be expected through at least the middle of the week, along with areas of Moderate HeatRisk in the Valley and onshore flow. Forecast high temperatures are currently projected to be in the upper 80s to low 90s in the Valley. Dry conditions and low afternoon humidity is anticipated for much of next week, in the mid teens to mid 20s. Periods of onshore breeziness will bring late day and overnight cooling to the Delta and adjacent Valley locations, keeping HeatRisk in the Minor category. A weak trough looks to cross the Pacific Northwest on Wednesday, and there is potential for some increase northerly flow behind it on Thursday. Towards the end of the week, ensembles are then showing an upper level trough dropping down and moving across the region next weekend. While there is still some uncertainty with this, it does look like a cooling trend and increased onshore flow is then favored for the end of next week into the following weekend. There is potential for some periods of elevated fire weather conditions in breezy winds and low humidity alignment next week with drying of fuels. Be sure to stay up to date with the latest forecasts at weather.gov! && .AVIATION... VFR conditions at TAF sites over the next 24 hours. Isolated shower or thunderstorms (10-15% chance) from 18Z-03Z over Shasta County mountains, Burney Basin and southern Cascades bringing local MVFR/IFR conditions. Sustained surface winds generally less than 12 kts in the Valley, except the Delta with southwest gusts to 20-25 kts through 06Z Sunday. Northerly flow will then increase bringing a brief periods of 15-20 kt gusts mainly to the north/central Sacramento Valley through 18Z and then decreasing. && .STO WATCHES/WARNINGS/ADVISORIES... None. && $$

281 FXUS65 KMSO 301933 AFDMSO Area Forecast Discussion National Weather Service Missoula MT 133 PM MDT Sat May 30 2026 .DISCUSSION... KEY MESSAGES: - Saturday through Monday: A slow moving weather system will bring prolonged, moderate to heavy rainfall, focused along the divide and in Glacier Park region. - River, stream, and creek rises from widespread rain and snow melt, leading to the potential minor flooding. - Snow levels fall near 7000-7,500 feet tonight into Sunday morning, cold, wet and raw conditions. Key forecast update from last issuance, models have continued their trend towards less precipitation. Hydro concerns remain but are diminishing in most locations except Flathead and Lake Counties. That said, any poor drainage area could see ponding of water after a heavier shower this weekend. While models are trending drier the Northern Rockies is still on track for a long duration precipitation event through Tuesday morning. The focus remains along US-93 and eastward, especially areas north of Flathead Lake including Glacier National Park. South of I-90, most of the precipitation will fall before Sunday afternoon, thereafter expect light showers, overcast skies, and cooler temperatures. The main focus of precipitation will be Flathead, Lake, Granite, Silver Bow, and Powell Counties. These locations have a 70 to 80% probability of receiving a 0.50" or more of precipitation by Tuesday morning. Higher terrain of the Mission and Flathead mountains, and the mountains along the Continental Divide have a 40 to 70% chance of receiving 1.50" or more of precipitation. Above 7000` that precipitation will mix with wet snow creating cold, wet, and raw conditions. && .AVIATION...The latest radar and satellite images are showing the numerous showers developing into a shield of stratiform precipitation across western Montana this afternoon. This swath of precipitation will steadily fill in this evening and linger over the region into Sunday. KGPI, KMSO and KBTM are expected to be under this precipitation throughout the night. While KHRF and KSMN will be on the edge, so they will have periods without steady precipitation. The precipitation could end around sunrise for KBTM, which could lead to the development of fog. Steady rain and low clouds will cause obscured terrain throughout the forecast period, especially for western Montana. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...Flood Watch from 6 PM MDT this evening through Monday morning for Flathead/Mission Valleys...West Glacier Region. ID...None. && $$

929 FXUS65 KBOI 310517 AFDBOI Area Forecast Discussion National Weather Service Boise ID 1117 PM MDT Sat May 30 2026 .UPDATE...Updated aviation discussion. && .KEY MESSAGES... - Slightly warmer Sunday, but continued cool and drier with breezy conditions across the Magic Valley area. - Temperatures warming to around 5-10 degrees above normal next week. - Breezy Wednesday and Thursday with a 20-40% chance of showers and thunderstorms across the north. && .SHORT TERM /Through Monday Night/... Issued 219 PM MDT SAT MAY 30 2026 An upper low centered over western Wyoming will move north into Montana tonight and Sunday, then merge with a trough over the Pacific Northwest on Monday. The main impact from the low will be breezy west-northwest winds through early this evening and again on Sunday, although winds aren`t expected to be as strong Sunday. Winds will subside on Monday. Most areas will be dry as the low pulls away, except the eastern half of Valley County and headwaters of the Boise River Basin which will see a 20-50% chance of showers and embedded thunderstorms late this afternoon and a 20-30% chance on Monday. It will remain cool the rest of the weekend but high temperatures will trend up 1-3 on Sunday, then around 5 more degrees on Monday. Low temperatures will be cool through the period, with 40s in the lower valleys and 30s in the mountains. && .LONG TERM /Tuesday through Saturday/... Issued 219 PM MDT SAT MAY 30 2026 Temperatures will continue to rise Tuesday and Wednesday from high pressure building in aloft from upper-level shortwave ridging. This will be short lived, as another upper-level shortwave trough will move through Wednesday afternoon into Thursday afternoon. The potent area of this trough is favored to move across our northern areas, bringing a 20-40% chance of showers and thunderstorms to Baker County and the west-central Idaho mountains. Elsewhere, precipitation chances will be lower. Breezy conditions will develop across the area with the passage of the trough. Highs are forecast to warm a few degrees before the arrival of the trough, reaching 5-10 degrees above normal. Temperatures will cool slightly (back to near-normal temps) Thursday behind the trough. On Friday, significant cluster disagreement exists for an incoming intense upper-level low moving down the Pacific NW coast. GEFS members cluster around stronger southwest flow aloft, while the EC ensemble is closer to zonal/weaker southwest flow. Regardless of the solution, warmer temperatures and continued breezy conditions are expected. This trough is expected to move inland over the weekend, although there are similarly timing and strength differences between ensemble members. For now, the forecast trends cooler on Saturday with a 10-20% chance of showers across the north. && .AVIATION /06Z Sunday through Monday/... Issued 1113 PM MDT SAT MAY 30 2026 Mainly VFR. Areas of mountain obscuration NE of KMYL and patchy mountain fog overnight. Surface winds: W-NW 5-15kt with gusts to 25kt near KJER KTWF Sun afternoon. Winds aloft at 10kft MSL: W-NW 20-30kt easing to 10-20 kt Sun afternoon. KBOI...VFR. Surface winds: NW 5-10kt, gusts to 20kt during the afternoon. && .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.....SH SHORT TERM...TL LONG TERM....CH

745 FXUS65 KLKN 310703 AAA AFDLKN Area Forecast Discussion...Updated National Weather Service Elko NV 1203 AM PDT Sun May 31 2026 .KEY MESSAGE... * Warming trend today through Friday && .DISCUSSION... (Today through Friday) WEATHER PATTERN OVERVIEW: A mainly west to east flow is over Northern and Central Nevada at this time. Sprinkles will be possible today, with highs climbing into the 70s. Overnight lows will be in the 30s and 40s. By Monday, upper low pressure will remain stationary across the Northern Rockies with upper ridging trying to build across the Eastern Pacific. For Northern and Central Nevada, expect a few degrees of warming along with a mix of clouds and sun. Highs will be in the 70s and 80s, with light winds. Overnight lows will be in the 30s and 40s, with calm conditions. Look for afternoon highs to continue warming each afternoon, reaching above normal levels through the period. Highs will be in the 80s to even the low 90s, with lows in the 30s and 40s. Winds will be light, though stronger breezes are possible from Thursday onward. FORECAST CONFIDENCE & DEVIATIONS: Added low end pops to account for limited moisture, instability and a convergent axis setting up across, and affecting portions of, Northeast and Central Nevada. Confidence is high with warming through the week, but low confidence exists for virga showers/sprinkles through Monday. && .AVIATION... VFR conditions will prevail at all terminals through at least the next 24 hours. Chances for light afternoon breezes up to 20KT will continue today at all terminal locations. && .FIRE WEATHER... Cumulus buildups, along with a few sprinkles, are possible across Central and Northeastern Nevada today. Winds will generally be below 25 mph, with occasional afternoon breezes.vTemperatures will gradually warm next week, with Tuesday`s high temperatures climbing into the 80s. && .LKN Watches/Warnings/Advisories... None. && $$ 86