ZSE Aviation Forecast Discussions

088 FXUS66 KSEW 011031 AFDSEW Area Forecast Discussion National Weather Service Seattle WA 331 AM PDT Wed Jul 1 2026 .SYNOPSIS... Weak broad upper level trough over the area along with low level onshore flow through Friday. This combination will produce mostly cloudy and cool conditions with a chance for light showers mainly over the mountains and along the north coast. Drier conditions and a small warming trend over the holiday weekend into early next week as the flow aloft becomes first more zonal then southwesterly Monday. Temperatures will return closer to normal with more sunshine. && .SHORT TERM /TODAY THROUGH FRIDAY/... Satellite imagery shows cloudy skies over Western Washington early this morning. Temperatures at 3 am/10z were in the upper 40s to mid 50s. If you liked Monday and Tuesday you are going to like the weather again the next two days with little change in the pattern. Weak upper level trough overhead and low level onshore flow combining to create cloudy and cool conditions across the area. Like yesterday chance of drizzle during the morning commute time and a chance for light showers late in the day over the mountains. Some sunbreaks late in the afternoon. Temperatures will remain well below normal with highs in the lower to mid 60s Wednesday and in the 60s Thursday. Lows in the upper 40s to mid 50s. Small changes Thursday night into Friday with a weak front dissipating off the north coast. 500 mb heights rising behind the front getting up into the mid to upper 570 dms by 00z Saturday. Low level onshore flow decreasing leading to a thinner marine layer and more sunshine in the afternoon. Highs Friday in the 60s and lower 70s. Lows in the 50s. June 2026 will go into the books as the 7th warmest in 82 years of records at Seattle-Tacoma airport. The average monthly temperature was 64.0 degrees ( 1.9 degrees above normal ). Even with only 5 days with measurable rain ( the normal is 9 days ) the monthly rain total of 1.34 inches was just 0.11 inches below normal. The number of days with measurable precipitation for Seattle the first half of the year was 68. This is tied for the 4th lowest in the January through June time frame and 19 days below the normal of 87 days. In 2025 Seattle had only 132 days with measurable precipitation. The 6th lowest yearly total at Seattle-Tacoma airport and 24 days less than the normal of 156 days. Felton && .LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/... Not much going on in the extended forecast. Models showing either weak trofiness or zonal flow aloft over Western Washington through the holiday weekend. 500 mb heights are in the mid 570 dms and low level onshore flow is light. End result is a couple of normal early July days with sunshine, especially in the afternoon. Highs in the upper 60s to mid 70s inland and mid 60s on the coast. Small change for the first part of next week with the large upper level ridge over the Midwest extending back over the Rockies beginning to build northwest. Zonal flow aloft becoming southwesterly with 500 mb heights rising slightly. A touch warmer Monday and Tuesday with the warmest locations in the interior getting close to 80 while the rest of the interior remains in the 70s. Highs on the coast in the mid to upper 60s. && .AVIATION... The northwesterly flow from an upper level trough continues through the TAF period. Stratus is overhead early this morning. KSEA already reporting MVFR ceilings with most of the remainder of the area VFR. By 12Z VFR areas will have a 60-70% probability for MVFR ceilings within the 2,000 to 3,000 foot range. As seen yesterday, localized areas of IFR are possible due to light drizzle between 12Z-16Z. The probabilities for MVFR drops after 18Z, however MVFR ceilings have held through 22Z-01Z farther north through the KPAE and KBFI area. MVFR conditions will prevail at KHQM with some breaks to VFR during the afternoon. Lower VFR ceilings are forecast to return to most other locations this afternoon. South to southwest winds 5 to 10 kt will continue through the period. KSEA...MVFR ceilings are present early this morning. Between 12Z-16Z, conditions could lower to IFR due to visibility restrictions from light drizzle. With the lower confidence on impact, this has not been added to the TAF yet. Ceilings improving to VFR this afternoon. South to southwest winds 5 to 10 kt will continue through the TAF period. && .MARINE... Broad high pressure will continue over the northeast Pacific with lower pressure inland. High pressure will weaken Thursday as a low moves towards the British Columbia coast with a weak front over the coastal waters. High pressure will rebuild later Friday and remain through the weekend. Small craft advisory remains in effect for the outer coastal waters for choppy seas today ( 10 or 11 feet with a 9 second period ). Seas subsiding tonight. Small craft advisory has been issued for the Central and Eastern Strait of Juan de Fuca with diurnally driven westerlies tonight. Small craft advisories are possible in the evenings over the weekend for the same reason. Felton && .FIRE WEATHER... Little in the way of fire weather concerns in the week ahead. Upper level troughing maintaining cool and cloudy conditions with high relative humidity values and a slight chance for showers along the coast and mountains through Thursday. Drier, sunnier, and more seasonable temperatures will begin Friday continuing into early next week. Low level onshore flow will moderate daytime minimum RH values and bring in good RH recovery each night. && .SEW WATCHES/WARNINGS/ADVISORIES... WA...None. PZ...Small Craft Advisory from 6 PM this evening to 2 AM PDT Thursday for Central U.S. Waters Strait Of Juan De Fuca- East Entrance U.S. Waters Strait Of Juan De Fuca. Small Craft Advisory until 6 PM PDT this evening for Coastal Waters From Cape Flattery To James Island 10 To 60 Nm- Coastal Waters From James Island To Point Grenville 10 To 60 Nm-Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm. && $$

817 FXUS66 KPQR 011035 AFDPQR Area Forecast Discussion. National Weather Service Portland OR 330 AM PDT Wed Jul 1 2026 .SYNOPSIS...Cool onshore flow and persistent cloud cover will maintain below average temperatures over the area through Thursday with little change in the overall weather pattern. A gradual warming trend develops Friday into the holiday weekend with most inland valley locations likely warming into the low to mid 80s for high temperatures each day from July 4-7 (70-90% chance, except in the Cowlitz Valley and along the lower Columbia where highs in the mid to upper 70s are the most likely outcome). && .DISCUSSION...Wednesday through Tuesday night...The weather pattern observed over the area over the past few days remains unchanged, with conditions on Wednesday expected to be a repeat of what was observed yesterday as moist onshore flow continues and maintains cool and cloudy conditions. Satellite observations from early Wednesday morning depicted overcast skies across all of northwest Oregon and southwest Washington from the coast to the Cascade crest, while surface weather observations depicted light and variable winds around 5 mph or less along with temperatures in the 50s. Similar to yesterday, skies are expected to remain mostly cloudy through the day aside from some limited breaks of sun in the late afternoon and evening, especially to the west of the I-5 corridor in the Willamette Valley. This is also when breezy northwest winds will develop with an incoming sea breeze front, sustained around 8-13 mph with occasional gusts up to 15-20 mph. Gusts up to 25-30 mph are expected in the central Columbia River Gorge and Upper Hood River Valley as westerly winds increase through the Gorge. Given the persistent cloud cover in place, temperatures will remain below average for early July. Forecast highs range from the mid to upper 60s for most locations, except around 70 degrees in Eugene-Springfield. Model guidance continues to suggest little change to the overall weather pattern on Thursday as well, aside from slightly more sun breaks. As such, temperatures should warm a bit on Thursday with highs in the low to mid 70s, except at the coast where highs will remain in the 60s. Conditions trend sunnier and warmer Friday into the holiday weekend as upper level flow transitions from northwesterly to westerly and 500 mb heights begin to increase a bit. By Friday, widespread highs around 75-80 degrees are expected for inland valleys. Highs will likely warm into the low to mid 80s for July 4-7 (70-90% chance each day, except in the Cowlitz Valley and along the lower Columbia where highs in the mid to upper 70s are the most likely outcome). Despite warmer temperatures inland, the coast will stay stuck in the 60s each day due to persistent onshore flow. Aside from a few stray sprinkles over higher terrain today, no precipitation is expected July 1-7. -23 && .AVIATION...Widespread cloud cover remains in place across all of northwest Oregon and southwest Washington this morning from the coast to the Cascade crest. Similar to what was observed yesterday, ceilings around 4000-5000 feet are expected to lower close to 3000 feet by 12-14Z Wednesday, except at KEUG where there is a 60-80% chance ceilings will stay around 3500-4000 feet. Ceilings will then lift back to 4000-5000 feet between 17-20Z Wednesday with daytime heating and increased low-level mixing. Winds are expected to follow a diurnal pattern that is similar to yesterday, with light and variable winds around 5 kt or less this morning becoming northwesterly around 7-12 kt by the late afternoon and early evening hours. Occasional wind gusts as high as 15-20 kt are likely to occur at all terminals by 00-02Z Thursday with an incoming sea breeze, except at KTTD and KUAO where the sea breeze front will struggle to reach. KPDX AND APPROACHES...Low-end VFR ceilings around 4000-5000 feet are expected to lower to around 3000 feet by 12-13Z Wednesday as probabilities for ceilings of 3000 feet or lower have increased to 75-85% during that time. Similar to what was observed yesterday, ceilings will most likely lift to 4000 feet or higher sometime between 16-18Z Wednesday, bringing a quick return to VFR flight conditions. Northwest winds around 5 kt are expected to increase to around 10 kt with occasional gusts up to 15-18 kt around 02Z Thursday with an incoming sea breeze front. Winds should become less gusty after 06Z Thursday. -23 && .MARINE...Buoy observations early Wednesday morning showed the continuation of steep seas around 7 to 8 feet at 9 seconds due to a persistent fresh northwest swell. Northwest winds continue around 5 to 15 kt, with gusts up to 20 kt over the outer waters. Winds and seas are expected to decrease late Wednesday morning into the afternoon, bringing improving conditions for small craft. Seas fall to 4-6 feet by late Wednesday night and then hold steady through the upcoming weekend. Meanwhile, predominately northwest winds are expected to continue through Friday with wind speeds becoming even weaker each day. A thermally induced surface trough will build northward up the south Oregon coast over the weekend, bringing increasing northerly winds with gusts up to 20-25 kt. As is often the case during this typical summertime pattern, wind speeds will be strongest during the afternoon and evening hours each day with daytime heating. Although significant wave heights are not expected to increase much, the increasing winds will result in choppier seas. -23 && .PQR WATCHES/WARNINGS/ADVISORIES... OR...None. WA...None. PZ...Small Craft Advisory until 11 AM PDT this morning for PZZ251- 271>273. && $$ www.weather.gov/portland Interact with us via social media: www.facebook.com/NWSPortland x.com/NWSPortland

154 FXUS66 KMFR 011130 AFDMFR Area Forecast Discussion National Weather Service Medford OR 430 AM PDT Wed Jul 1 2026 ...Aviation Discussion updated... .DISCUSSION... KEY POINTS... * No significant weather impacts expected through the 4th of July. * Mild temperatures and enhanced afternoon breezes will continue today and Thursday. * No precipitation in the forecast. Afternoon cumulus buildups expected across northern California and East Side through Thursday...stray shower possible. * Temperatures trend warmer Friday into the weekend, peaking around 5 to 8 degrees above normal. * Sunday into early next week - pattern bears watching for potential thunderstorms and/or days where gusty winds combined with low RH could result in critical fire weather conditions. A broad upper trough will remain in place over the region through at least Thursday. This will bring continued mild temperatures to the area with highs slightly below normal. Winds will be breezy to gusty in the afternoons and evenings for most locations. Also expect daily marine pushes of low clouds into Coos County and the Umpqua basin during the nighttime/morning hours, with clearing by early afternoon. A weak upper level disturbance on Thursday may bring some cumulus build ups to mountains east of the Cascades and over northern California but models and ensembles continue to indicate very low chances (5% or less) for showers or thunderstorms over the area. The upper trough shifts northeast and heights build over the area on Friday and Saturday. This will allow temperatures to trend warmer. Highs are expected to be around 5 to 8 degrees above normal for inland areas with highs ranging from the upper 80s to mid 90s across inland valleys by Saturday. A high pressure ridge builds over the western US Sunday into early next week with the ridge axis centered east of the area. Meanwhile, to the northwest, an upper low approaches British Columbia with a trough developing off the PacNW coast. This pattern will result in continued warmer than normal temperatures across inland areas. Southwest flow aloft may bring increased mid level moisture into the area at times. However, models indicate deeper monsoon moisture and remnants of tropical activity will remain well to the south. Weak mid level moisture combined with daytime instability and weak disturbances aloft may allow for a low chance (10%) for thunderstorms as early as Sunday and moreso, on Monday and tuesday, mainly for northern California and from the Cascades east. Additionally, with the upper trough approaching the region and disturbances aloft, we may see periods of enhanced afternoon and evening winds starting around Monday and Tuesday. We will monitor this period for the potential of gusty winds and low humidities which could result in critical fire weather concerns. && .AVIATION...01/12Z TAFs...Onshore flow is bringing an overcast deck of 3500-4000 ft AGL to Coos and Douglas Counties with areas of mountain obscurations through 17-18z this morning. These clouds will clear in the late morning and early afternoon. Expect another round of breezy to gusty winds across the area during the late afternoon and evening, generally gusts 20-25 kt. Then, areas of MVFR are expected to develop along the coast north of Cape Blanco Wednesday night. && .MARINE...Updated 200 AM PDT Tuesday, June 30, 2026...Strong north winds continue, resulting in very steep seas and areas of gales from Gold Beach southward through Wednesday night. North of these areas, a combination of fresh swell and north winds will maintain steep seas through Wednesday night. Then, small craft advisory level conditions may last through later parts of this week, mainly across the southern waters. Winds may increase late Saturday into Sunday, resulting in a potential for elevated winds and seas across most the waters. && .MFR WATCHES/WARNINGS/ADVISORIES... OR...CA...None. PACIFIC COASTAL WATERS...Small Craft Advisory until 5 AM PDT Thursday for PZZ350-356-370-376. Gale Warning until 5 AM PDT Thursday for PZZ356-376. && $$

029 FXUS66 KEKA 010931 AFDEKA AREA FORECAST DISCUSSION National Weather Service Eureka CA 231 AM PDT Wed Jul 1 2026 .SYNOPSIS...Gusty north winds continue along shore through Wednesday. Seasonably warm to below average temperatures through Thursday before temperatures warm up Friday and through the holiday Weekend. && .KEY MESSAGES... - Gusty north winds each afternoon along the shore through mid week. - Hotter temperatures over the holiday weekend .DISCUSSION...A normal summer pattern will persist for the next week as ridging builds over the inter-mountain West and a trough settles over British Columbia. This will leave Northwest California settled in between resulting in modest fluctuations in high temperatures through early next week. The ridge will push toward the coast over the weekend allowing temperatures to warm from the 80s into the 90s in the interior valleys. At the coast northerly winds will be gusty each afternoon, strongest today and again Wednesday, but generally be on a down-trend from the very gusty conditions that occurred the last few days. Temperatures along the coast are expected to be seasonal with highs in the lower 60s for most areas throughout the week. As we head into next week, the trough is forecast to begin shifting east, nudging the warmest air back out of our region for at least a brief period. Temperatures this Saturday on July 4th are forecast to be around 60 at the coast and in the lower to mid 90s inland. Cloud cover may be more extensive along the coastline with moisture increasing in the boundary layer as the marine layer inversion strengthens due to the building ridge. Low stratus and fog may be a concern during the evening hours for coastal areas depending on the strength of the coastal winds and the mixing those winds can provide. /RPA && .AVIATION...Northerly winds subsided overnight. Mostly clear skies and VFR conditions remain in place. Moisture pooling and terrain enhancement has led to persistent stratus over the King Range through parts of interior humboldt, including Kneeland. The ceiling has mainly verified around 1500 ft AGL, and coverage will continue expanding around Humboldt Bay and ACV. Lowering to IFR levels is possible early Wednesday morning before increasing northerly winds quickly mix everything out and regain full VFR CIGs and VIS. Northerly winds will turn strong again from the late morning to late Wednesday afternoon. Gusts of 20 to 30 kts can once again be expected at the coastal terminals, with higher gusts around Point St George and CEC, before winds ease into the evening hours. && .MARINE...Northerly gales are now occurring in the outer waters with steep short period seas reported to as high as 14 feet at the Cape Mendocino buoy. The steep seas are also propagating into the inner waters zones. Thus gale warnings remain in place over the outer water and will remain in place through Wednesday night, while hazardous seas warnings have been issued for the inner zones with the steepest seas outside of 5 nm. Winds will diminish some Thursday and into Friday as a trough pushes surface high pressure over the eastern Pacific farther southwest of the area. This will result in a weakening of the pressure gradient and thus lighter winds and lower seas, but still very likely remaining within small craft criteria into the holiday weekend. /RPA && .EKA WATCHES/WARNINGS/ADVISORIES... CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Hazardous Seas Warning until 6 AM PDT Thursday for PZZ450- 455. Gale Warning until 6 AM PDT Thursday for PZZ470-475. && $$ 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

383 FXUS66 KMTR 011108 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 408 AM PDT Wed Jul 1 2026 ...New AVIATION, MARINE... .KEY MESSAGES... Updated at 1146 PM PDT Tue Jun 30 2026 - Seasonally cool temperatures and breezy afternoon winds will continue through Thursday. - Gradual warming trend late this week and into the weekend, bringing pleasant conditions for the holiday weekend. && .SHORT TERM... Issued at 1146 PM PDT Tue Jun 30 2026 (Tonight through Thursday) Longwave trough over the western CONUS will remain in place through Wednesday, with weak bouts of energy passing through the flow at 500 hPa. This pattern has been persistent over the last week, which has allowed the marine layer to be locked in place and kept temperatures below seasonal norms along the coast. As has been seen over the last few days, temperatures will continue to be in the upper 50s to 60s along coastal communities, with those inland in the 70s to mid 80s. Marine layer will slowly erode along coastal areas from north to south by midday, especially for areas north of the Monterey Bay Area. Although, communities located along Monterey Bay should largely remain locked under the marine layer through much, if not all, of the day. Some breaks in the clouds may allow the sun to break through briefly at times. We will also continue to see breezy conditions through the afternoon as weak bouts of energy continue to pass through the broad upper trough. && .LONG TERM... Issued at 1146 PM PDT Tue Jun 30 2026 (Thursday night through next Tuesday) We will continue to fall under the influence of the long wave trough on Thursday, bringing another day of cool and breezy conditions under the marine layer along the coast. Warmer temperatures and mostly clear skies will remain inland. Friday onward, we will start to see this long wave pattern break down over the area. We will also start to see some weak ridging develop going into the weekend. Thus, we will start to see a gradual warming trend through the weekend. Temperatures for communities along the coast will largely remain in the mid 60s to near 70, with more notable warming noted for inland areas. This will be especially true for inland areas south and east of the Monterey Bay Area where temperatures in the upper 80s to low 90s will be seen. As a result, HeatRisk along the coastal communities will remain low (green), while inland areas will be minor (yellow). As was mentioned in the last forecast package, guidance is hinting at the potential for another long wave trough to develop over the western CONUS. Although, CPC continues to highlight the area under favorability for above normal temperatures into the middle of next week, potentially bringing more summer-like weather to the area. && .AVIATION... (12Z TAFS) Issued at 408 AM PDT Wed Jul 1 2026 Stratus /MVFR-IFR/ continues to develop while onshore winds also continue. Stratus mixes out by late morning and early afternoon otherwise VFR prevails today. Coastal stratus redevelops tonight and Thursday morning. Vicinity of SFO...VFR. West wind 5 to 15 knots. SFO Bridge Approach...Similar to SFO. Vicinity of SJC and OAK...San Jose Airport VFR, southeast wind holding near 13 knots through morning, diminishing to light and variable wind 21z today. Northwest wind 5 to 10 knots in the afternoon and evening then shifting to southeast at 10 to 12 knots tonight and Thursday morning. Oakland Airport stratus /MVFR/ mixing out to VFR by late morning. Southwest to west wind 5 to 12 knots. Monterey Bay Terminals...Stratus /MVFR-IFR/ mixes out to VFR by late morning and/or afternoon. Stratus /MVFR-IFR/ redevelops and moves inland tonight and Thursday morning. West to northwest winds 5 to 15 knots with afternoon gusts to 20 knots in the Salinas Valley. && .MARINE... (Today through Monday) Issued at 355 AM PDT Wed Jul 1 2026 A gale warning continues for the northern outer waters while weaker, yet still gusty winds affect the rest of the waters. Gale force gusts across the northern outer waters will ease by late week. Moderate northwest breezes will prevail elsewhere. Rough to very rough seas will continue in the outer waters today and tonight before abating to become moderate to rough Thursday into Friday. && .MTR WATCHES/WARNINGS/ADVISORIES... CA...None. PZ...Small Craft Advisory until 3 AM PDT Thursday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 0-10 nm. Small Craft Advisory until 9 AM PDT this morning for Pt Reyes to Pigeon Pt 0-10 nm. Gale Warning until 3 AM PDT Thursday for Pt Arena to Pt Reyes 10- 60 NM. && $$ SHORT TERM...Gunkel LONG TERM....Gunkel AVIATION...Canepa MARINE...Canepa 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

074 FXUS66 KOTX 011132 AFDOTX Area Forecast Discussion National Weather Service Spokane WA 432 AM PDT Wed Jul 1 2026 .KEY MESSAGES... - 20% chance for showers and thunderstorms along the Canadian border Wednesday afternoon. - Breezy winds through the Cascade Gaps each evening this week. - Warmer and drier for the end of the week into the holiday weekend. - Breezy winds Saturday afternoon and early evening. && .SYNOPSIS... There is a small risk for showers and thunderstorm across the northern mountains Wednesday. Cooler than normal conditions continue through Thursday with breezy conditons each evening in the Cascade gaps. Friday into the the holiday weekend, temperatures warm back into the 80s with dry conditions. Winds will be breezy across the region on Saturday. && .DISCUSSION... Today through Thursday: The Inland NW will remain in a weak trough pattern through this period, with occasional weak impulses skirting by. With limited moisture this will mean only limited shower chances from time-to-time near the Cascade crest and northern mountains. We will also have to keep an eye on southeastern WA and the central to lower ID Panhandle where a boundary will remain stalled and pool some moisture and instability just southeast of our CWA. There could be some stray showers or t-storms that creep north each afternoon. Yet for the large part the forecast stays dry. Occasional clouds will traverse the area today and tonight and then increase later Thursday as the flow starts to turn more westerly and some more middle to high clouds spread in. Gusty conditions are expected each late afternoon and evening through the Cascade Gaps into western basin. Relative humidity values drop to 20-25% each afternoon near that area too, which will lead to locally elevated fire weather conditions. Temperature will reach the 70s to lower 80s. Friday to Sunday: the pattern remains more westerly this period while a slightly deeper trough skims by the US/Canadian border. Limited shower and t-storm chances will linger near the Canadian border Friday, especially in the afternoon. Otherwise the forecast is dry and temperatures will start to warm closer to or slightly above normal with highs in the 80s to low 90s by the weekend. The passing trough and proximity of the jet stream just south of the Canadian border will contribute to breezy to windy conditions. The winds will be most notable Friday and especially Saturday, with speeds of 10-20 mph and gusts of 20 to 30 mph, strongest near the lee of the Cascades and western basin. Minimum RH values will in the teens and 20s by Saturday afternoon. So with the hot, dry and breezy conditions there will be elevated fire conditions on the Fourth of July, with pockets of near critical fire conditions near the lee of the Cascades and Okanogan Valley. Thus will need to be monitored. Monday and Tuesday: models are still coming together but they show the potential for weak ridging developing with the westerly flow turning southwest. The forecast stays dry with occasional but limited clouds. We will still have to watch for some breezy conditions in the afternoon hours, but they do not look as strong as Saturday. But temperatures are forecast to warming into the upper 80s to 90s this period, with RH values still dropping into the teens and 20s. So elevated fire conditions are still possible, especially Tuesday. /Solveig && .AVIATION... 12Z TAFs: VFR conditions are forecast for all TAF sites through 12z Thursday, except for a localized MVFR deck around KCOE this is expected to dissipate early this morning. Residual boundary layer moisture over NE WA/ID Panhandle and light winds will also allow for patchy fog through 15z over some of the northern mountain valleys such as Colville. A continued deep marine layer into the Cascades will contribute to breezy winds at KEAT with northwest winds gusting to 20-25 kts after 00z Thursday. FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: High confidence for VFR conditions for all TAF sites except KCOE where there is low to moderate confidence of MVFR CIGS at times through 14z. JW ----------------------- 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 74 49 77 52 80 53 / 0 0 0 0 0 0 Coeur d`Alene 74 50 76 54 79 54 / 10 0 0 0 0 0 Pullman 71 44 74 48 77 49 / 0 0 0 0 0 0 Lewiston 79 53 82 57 86 57 / 0 0 0 0 0 0 Colville 76 45 77 48 80 48 / 10 0 0 0 10 0 Sandpoint 73 48 75 51 77 52 / 10 0 0 0 10 0 Kellogg 72 48 75 51 76 51 / 10 0 0 0 0 0 Moses Lake 80 49 81 53 86 53 / 0 0 0 0 0 0 Wenatchee 80 55 81 58 85 59 / 0 0 0 0 0 0 Omak 80 52 81 54 85 54 / 10 0 0 10 0 0 && .OTX WATCHES/WARNINGS/ADVISORIES... WA...None. ID...None. && $$

321 FXUS66 KPDT 011013 AFDPDT Area Forecast Discussion National Weather Service Pendleton OR 313 AM PDT Wed Jul 1 2026 .KEY MESSAGES... - Breezy with the last day of below normal temperatures today. Breezy conditions possible again on Saturday. - Warming temperatures into the holiday weekend and early next week. - Generally dry conditions are expected, though some mainly mountain showers or thunderstorms are possible early next week. && .DISCUSSION... The upper trough which has been over the western United States for much of the last week will begin to weaken and the flow will become more zonal over the next few days. As a result, temperatures will begin to warm, and today will be the last day of the below normal temperatures. Additionally, there will be one last bit of shortwave energy moving through today, which will help enhance the trough before it begins to weaken Thursday and the zonal flow permeates Friday and Saturday. By Sunday, the flow will become more southwesterly into early next week and this is when it is possible for any short waves to bring shower or thunderstorm chances, mainly to the mountains, but overall it should remain dry. Additionally, high pressure will begin to build over the four corners and how strongly this ridge builds and how it interacts with other weather features over the course of the next week will determine how hot we get and ultimately if any triple digits are in our near future. But a warming trend through the holiday weekend and into early next week is definitely in store. By Monday and Tuesday, highs in the low to mid 90s across the Columbia Basin and other low elevation areas look to be likely. Winds will be gusty again today, mainly across the Kittitas Valley, Simcoe Highlands, portions of the Gorge and north- central Oregon, though winds shouldn`t be as strong as they have been. Gusts still could reach 25 to 35 mph with locally higher values. Today should be the last really breezy day. Wind gusts do continue in the 20 to 30 mph range over the next few days in the Kittitas Valley, Columbia Gorge, Basin and Simcoe Highlands. By Saturday, these gusts coupled with RH values in the teens will lead to enhanced fire weather concerns and we will keep an eye on how things develop over the next few days for any potential fire weather headlines. && .AVIATION /12Z TAFS THROUGH 12Z THURSDAY/... VFR conditions are expected through the TAF period. Winds will gust around 20 kts at most sites through the afternoon and early evening hours and 25 to 30 kts at DLS. && .Preliminary Point Temps/PoPs... PDT 76 46 80 51 / 0 0 0 0 ALW 77 52 81 57 / 0 0 0 0 PSC 81 51 83 54 / 0 0 0 0 YKM 82 51 83 53 / 0 0 0 0 HRI 79 49 82 54 / 0 0 0 0 ELN 74 47 77 50 / 0 0 0 0 RDM 75 38 80 42 / 0 0 0 0 LGD 76 45 81 50 / 0 0 0 0 GCD 78 43 83 48 / 0 0 0 0 DLS 74 52 79 55 / 0 0 0 0 && .PDT WATCHES/WARNINGS/ADVISORIES... WA...None. OR...None. && $$ DISCUSSION...77 AVIATION...77

448 FXUS65 KREV 010902 AFDREV Area Forecast Discussion National Weather Service Reno NV 202 AM PDT Wed Jul 1 2026 .KEY MESSAGES... * Cooler conditions remain in place with a gradual warming trend through the week, reaching near normal temps by the holiday weekend. * Typical afternoon breezes along with dry conditions -- stay fire safe. * There`s a 5% chance for afternoon showers or a thunderstorm to form from this afternoon into next week. && .DISCUSSION... Each afternoon will be progressively warmer than the one before, as the trough begins to broaden and lift to the east this week. By the holiday weekend, western Nevada valleys will be firmly back in the mid 90s, with mid 80s to near 90 across Sierra valleys. Our afternoons this week will also feature daily gusts of 20-25 mph. With the recent dry conditions across the region, any spark could ignite and carry in dry fuels. Avoid activities that could start a fire as a precaution. If your plans take you to a lake this week, keep in mind the afternoon gusts could create choppy lake waters. For those recreating in the Sierra, keep an eye on the sky, since a 5% chance for a shower or storm returns each afternoon this week and into the weekend. Some CAM solutions show storms forming over the Sierra and then advancing to the Sierra Front, while others do not depict much more than cloud development. Keep up to date with the latest forecast discussions! HRICH && .AVIATION... * Widespread VFR conditions today, with typical afternoon gusts up to 20 kts around 21z-00z. A 5% chance for showers exists this afternoon, mostly around KTVL/KMMH. Tomorrow will be similar to today. HRICH && .REV Watches/Warnings/Advisories... NV...None. CA...None. && $$

779 FXUS66 KSTO 301918 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 1218 PM PDT Tue Jun 30 2026 .KEY MESSAGES... - Cooler temperatures through Thursday, with warmer and more seasonable temperatures by July 4th Weekend accompanied by continued onshore flow. && .DISCUSSION... Clear skies and seasonable temperatures are being observed across interior NorCal this afternoon. Upper level troughing will remain in place through the middle of this week prompting slight enhancement of onshore flow and lowering of high temperatures through Thursday. By the weekend, upper level troughing breaks down slightly as high pressure builds in the Pacific and in the desert southwest. High temperatures trend higher, returning to seasonable normals Friday and through the July 4th Holiday weekend. Triple digit highs are in the forecast for the northern Sacramento Valley on July 4th, however the recent relatively cooler temperatures and overnight lows in the upper 50s to mid 60s will keep Minor HeatRisk in the forecast the next 7 days. && .AVIATION... VFR conditions are expected over the next 24 hours. Southwest winds gusts 20 to 25 kts in the Delta and over the Sierra Crest. South to southwest winds in the Sacramento Valley (northwest in the northern SJ Valley) with gusts 10 to 20 kts from 21Z-06Z then lowering to less than 12 kts. && .STO WATCHES/WARNINGS/ADVISORIES... None. && $$

034 FXUS65 KMSO 010839 AFDMSO Area Forecast Discussion National Weather Service Missoula MT 239 AM MDT Wed Jul 1 2026 .DISCUSSION... KEY MESSAGES: - Scattered showers and thunderstorms are expected again this afternoon and evening, with a marginal risk for strong to severe storms across southwest Montana and Lemhi County. - Afternoon high temperatures increase through the upcoming holiday weekend, along with mostly dry conditions. Rain from yesterday`s thunderstorms continues to move northeast across the Northern Rockies this morning. Yesterday`s thunderstorms produced up to 0.50 inches of rain per hour in isolated areas, which is a good indication of what to expect today. A shortwave trough of low pressure moving onshore from the Pacific Northwest will bring more moisture to the Northern Rockies. This will be the trigger for another round of afternoon and evening showers and thunderstorms. Expect these thunderstorms to be capable of producing brief heavy rain, with rates near 0.50 inches per hour. The heavier rainfall rates will be relatively isolated, however if they do impact area burn scars, keep an eye out for excessive runoff. One ingredient missing from yesterday that we`ll have today, is modest mid-level wind shear, which will introduce a marginal risk for severe thunderstorms capable of producing strong, gusty winds this evening. Southwest Montana has the highest risk for these strong thunderstorms, including Silver Bow, Powell, Granite, and Deer Lodge counties. There is about a 10 percent probability for wind gusts to exceed 50 mph, so ensure outdoor items are secured in the event a strong thunderstorm tracks over your area. Later this week, high-level winds will become more westerly, and temperatures will return to normal for this time of year by Friday. There will be enough moisture and instability to support a few afternoon and evening thunderstorms, but they will be hit-and- miss. By the holiday weekend, expect mostly dry conditions and above-normal temperatures, reaching the mid- to upper 80s in western Montana valleys and 90s in Idaho`s lower Salmon and Clearwater valleys. && .AVIATION...Rain from yesterday`s thunderstorms continues to move northeast across the Northern Rockies this morning. Lingering surface moisture brings a minor threat for fog in the vicinity and low stratus clouds along the terrain for all aviation sites early this morning through 01/1400Z. Expect another round of scattered rain showers and thunderstorms this afternoon and evening. KBTM and KSMN will see the first threat this afternoon, with thunderstorms developing around 01/2000Z. Thunderstorms will track northeast through the afternoon, diminishing and moving out of the region by 02/0300Z. The Storm Prediction Center highlights portions of Southwest Montana and Lemhi County for a marginal risk of severe thunderstorms capable of producing strong, damaging winds, including Butte and Salmon. Timing for these stronger thunderstorms will likely be between 01/2200Z and 02/0200Z. KMSO and KHRF will be under threat for thunderstorms as well between 01/2200Z and 02/0200Z. These thunderstorms are expected to remain below severe limits, mainly producing brief bursts of heavy rainfall, occasional lightning, and wind gusts around 25 to 30 kts. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...None. ID...None. && $$

956 FXUS65 KBOI 011145 AFDBOI Area Forecast Discussion National Weather Service Boise ID 545 AM MDT Wed Jul 1 2026 .UPDATE...Updated aviation discussion. && .KEY MESSAGES... - Isolated showers and thunderstorms are expected area-wide Wednesday afternoon and evening, and again on Thursday near the Idaho-Nevada border. - Dry this weekend into early next week. - Steady warming trend throughout the week with dry conditions and temperatures near normal on the 4th of July. && .SHORT TERM /Through Friday Night/... Issued 405 AM MDT WED JUL 1 2026 Morning satellite loop shows several features of interest over the region, including several mesoscale mid-level circulations across eastern Oregon and Idaho embedded within broader cyclonic flow aloft. One of these is contributing to a narrow and focused area of precipitation this morning over the Treasure Valley, which was surprisingly depicted by some convection-allowing models. Mesoanalysis suggests there is marginal instability in place, so can`t rule out a few strikes from this activity as it develops northeastward towards the Boise Mountains, before eventually diminishing by late morning. Isolated showers and thunderstorms will redevelop later this afternoon across southern Idaho and the central Idaho Mountains, with the western Magic Valley (including Twin Falls/Jerome) the most likely area to be affected. The primary threat would be brief and locally gusty winds to 50 mph with the strongest storms. By Thursday, the threat for thunderstorms becomes more confined to immediately near the Idaho-Nevada border. Temperatures will also continue to warm a few degrees each day, reaching the mid-80s on Thursday, and upper-80s by Friday over the lower elevations - which is right at normal for this time of year. Further drying will also occur into Friday, with the probability of precipitation very low area-wide. && .LONG TERM /Saturday through Wednesday/... Issued 405 AM MDT WED JUL 1 2026 The primary hazard leading into early next week will be the increasing temperatures and associated impacts. The general model consensus is for an upper ridge to build and expand to the south and west, which will promote a return of above-normal temperatures. Monday is currently forecast to be the warmest day of the period, with mid-upper 80s common through the Snake Plain, with some locations potentially even getting to 100 degrees. This will bring moderate HeatRisk impacts to populated areas such as Boise and Mountain Home - affecting those that are sensitive to heat. Low-end precipitation chances return by Tuesday, but there currently isn`t much signal for showers or thunderstorms outside of the central Idaho Mountains through mid-week. && .AVIATION /12Z Wednesday through Thursday/... Issued 538 AM MDT WED JUL 1 2026 VFR. Isolated showers/thunderstorms this morning over central ID mountains. Isolated showers and thunderstorms develop this afternoon, mainly over the ID W-Central mtns and near the ID/NV border, with a 30% chance of affecting KTWF/KJER. Gusty outflow winds of 30-35 kt. Surface winds: W-NW 5-15 kt. Becoming light and variable Thu morning. Winds aloft at 10kft MSL: W-SW 5-15 kt. KBOI...VFR. Isolated showers/thunderstorms through 01/15Z. Thunderstorms redeveloping to the south this afternoon with distant CBs. Surface winds: NW 7-12 kt. Becoming light and variable by early Thursday morning. && .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...JR LONG TERM....JR

393 FXUS65 KLKN 010701 AAA AFDLKN Area Forecast Discussion...Updated National Weather Service Elko NV 1201 AM PDT Wed Jul 1 2026 .KEY MESSAGES... * Isolated thunderstorms possible in Northeastern Nevada each afternoon and evening today and Thursday * Elevated fire weather conditions in Central Nevada Thursday afternoon into Thursday evening * Warming trend today through Sunday && .DISCUSSION... (Today through Tuesday) WEATHER PATTERN OVERVIEW: Temperatures today will be a few degrees warmer than yesterday. A pair of shortwave troughs are expected to ride the broader trough through the area beginning today, bringing increased moisture and instability. Isolated convective development is anticipated for most of Northern and Central Nevada this afternoon into this evening, with CAPE values around 200-400 J/kg. Precipitable water values are sitting around half an inch which usually indicates a dry thunder threat. Thursday looks to be in between shortwave impacts, resulting in a drier and much more marginal convective atmosphere. Winds are also expected to increase in central Nevada on Thursday, with gusts 25-30 mph. Temperatures continue to climb through the week and especially increase this weekend as the trough finally gives way to a ridging pattern. High temperatures are expected to reach the low to mid 90s for the holiday weekend. Very warm temperatures are expected to persist into early next week, with highs remaining in the low to mid 90s. FORECAST CONFIDENCE & DEVIATIONS: High confidence in warm temperatures through the weekend. Moderate confidence in convection today, but low confidence for Thursday. Moderate confidence in calm weather after Friday. && .AVIATION... VFR conditions and winds under 10KT expected at all sites. && .FIRE WEATHER... Isolated thunderstorms are possible each afternoon and evening today and Thursday. On Thursday antecedent low RH values combined with elevated south to southwest wind speeds of 15-20 mph and gusts of 25- 30 mph for fire weather zones 425/426/427, resulting in an elevated risk of wildfires. && .LKN Watches/Warnings/Advisories... None. && $$ DISCUSSION...94 AVIATION...94 FIRE WEATHER...99