496 FXUS66 KSEW 200951 AFDSEW Area Forecast Discussion National Weather Service Seattle WA 251 AM PDT Sat Jun 20 2026 .SYNOPSIS... High pressure aloft will briefly weaken over Western Washington today as an upper trough moves across British Columbia. Upper level ridging will rebuild into the region Sunday through Tuesday for a significant warming trend. The ridge will begin to weaken by the middle of the coming week for cooler conditions. A frontal system could bring the regions first chance of rain in more than two weeks by the end of next week. && .SHORT TERM /TODAY THROUGH MONDAY/... A weak system passing well north of the area this morning has induced a decent onshore push with cooler marine air pouring inland. We`ll see areas of morning low clouds getting at least part way inland and most interior locations will shave 7 to 10 degrees off their high temperatures over yesterdays readings. The cooling trend will be short-lived. Upper level ridging will begin to rebuild into the area on Sunday. Our brief flirtation with low level onshore flow will revert to northerly Sunday afternoon then turn very weakly offshore Sunday night into early Monday as thermally induced low pressure at the surface expands northward into Western Washington once again. This will lead to a pretty good spike in high temperatures for Monday with much of the Puget Sound lowlands seeing highs in the 80s to around 90 in the Southwest Interior. Coastal high temperatures on Monday are far less certain. A number of models suggest the thermal trough will be oriented just inland from the coast. This makes the forecast from the 50th percentile NBM (near 80 at Hoquiam) used in the forecast a bit suspect. In any case, Moderate HeatRisk remains the central story for the interior lowlands on Monday. && .LONG TERM /MONDAY NIGHT THROUGH FRIDAY/... An upper level ridge remains over the area into Tuesday, but the low level flow will be weakly onshore. This will cool the coast, but the NBM seems to discount this reality. The thermal trough remains in place across the interior lowlands where most locations away from the water will be well into the 80s and lower 90s with widespread Moderate HeatRisk. Upper level ridging is expected to begin to weaken as we move beyond the middle of next week. This will lead to a downward trend in temperatures. Ensembles generally agree that anomalous upper troughing will take up residence over the region by the end of next week. Though they disagree somewhat on the overall strength of the trough, the bigger story is the introduction of Western Washington`s first chance at measurable precipitation in more than two weeks. 27 && .AVIATION... VFR for the interior terminals and MVFR along the coast early this morning. While probabilities have backed off slightly, there still remains a slight chance (20-40%) the the marine stratus will bring MVFR cigs to the interior terminals between 11z-18z. Improvement to VFR this afternoon for the interior terminals. There is some uncertainty whether conditions will improve along the coast; some guidance suggests ceilings may lift for a brief period to low-end VFR in the evening (around 00z) and then quickly deteriorate after 03z to MVFR again. Latest LAMP guidance is trending more pessimistic with a 50-70% chance of MVFR cigs and slim chances of improvement to VFR in the evening. Another round of stratus is possible (30-50% chance) Sunday morning for the interior terminals after 11z. Generally SW winds today 8-15 kt, with the strongest winds along the coast. Winds ease tonight. KSEA...VFR today with a slight chance (25-30%) of MVFR cigs between 12z-17z. Another round of MVFR possible (30% chance) Sunday morning after 12z. Southwesterly winds up to 8-12 kt through the afternoon. Winds will ease in the evening to 4-6 kt. 29 && .MARINE... High pressure continues to weaken today as a low pressure system moves through British Columbia. Once the low pressure system pushes east of the Cascades, high pressure will quickly rebuild over area waters late this evening and will strengthen through midweek. A frontal system will approach the waters on Thursday, leading to high pressure to weaken. A Small Craft Advisory continues this morning for elevated seas and winds. Seas and winds will gradually subside this afternoon and remain at 4-7 ft through Monday. Gusty northwesterly winds through the Strait of Georgia this morning may lead to occasional 21 kt or greater gusts over the northern interior waters. These gusts are expected from the San Juan Islands north to Point Roberts. Moreover, with high pressure strengthening over the waters early next week, increased northerly flow over the coastal waters will bring another chance for small craft winds and seas Monday through midweek. Latest probabilities range between 45-70% for winds 21 kt or greater. Diurnal pushes through the Strait of Juan de Fuca will continue into late next week. Latest guidance suggests that the best chances for for small craft winds will be Wednesday and Thursday. On Wednesday there is a 65-85% chance for small craft winds and a slight chance (25-35%) of gales. The push on Thursday will be slightly weaker, but there is moderate to high confidence (55-70%) for small craft winds, in addition to a slight chance (15-25%) for gales. 29 && .FIRE WEATHER... Elevated fire weather concerns on Monday and Tuesday with minimum relative humidity values dropping into the 20s in Cascade valleys. Can`t rule out isolated teens as well. Fuels will continue to dry and the atmosphere may become conditionally unstable with the surface thermal trough Monday and Tuesday. Fuels are getting close to critical levels. Even without hitting critical levels needed for red flag warnings to be issued, fine fuels like grass and brush will ignite quickly with it being so dry. Lets continue to be careful out there. && .SEW WATCHES/WARNINGS/ADVISORIES... WA...None. PZ...Small Craft Advisory until 11 AM PDT this morning for Coastal Waters From Cape Flattery To James Island Out 10 Nm- Coastal Waters From James Island To Point Grenville Out 10 Nm-Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm. Small Craft Advisory until 11 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. && $$

446 FXUS66 KPQR 200923 AFDPQR Area Forecast Discussion National Weather Service Portland OR 223 AM PDT Sat Jun 20 2026 .SYNOPSIS...Onshore flow will support morning clouds and cooler temperatures today. Temperatures re-bound Sunday as high pressure re-builds offshore. The hottest days of the week are expected Monday and Tuesday, with widespread Moderate HeatRisk and localized Major HeatRisk for the Portland-Vancouver Metro Area. Warm low temperatures for interior valleys will provide limited overnight relief, especially in urban areas. There is some uncertainty on Wednesday with how quickly the heat diminishes, but confidence is increasing for cooler temperatures and precipitation chances by Thursday-Friday. && .DISCUSSION...Today through Friday...The Pacific Northwest currently remains within the southern periphery of an upper- level trough dropping down into southern British Columbia and Alberta. While this system remains too far north to bring us any precipitation, we`re still getting increasing onshore flow and moisture. As a result, satellite imagery and surface observations as of early Saturday morning depict widespread marine stratus along the coast with some stratus beginning to develop across the southern Willamette Valley and adjacent Cascade foothills. As the low level atmosphere moistens up this morning, stratus will gradually spread across parts of the Willamette Valley. Morning cloud cover and onshore flow will support cooler temperatures today with afternoon highs peaking in the upper 70s to near 80 across interior valleys and 60s along the coast. While stratus may linger along the coast today, inland stratus should break out by late morning or early afternoon as daytime heating progresses. It`s worth noting that the passing trough to the north will tighten the west to east surface pressure gradient across the Cascades on Saturday leading to breezy conditions through central Columbia River Gorge and Upper Hood River Valley, where westerly winds may gust up to 30-40 mph with a 25-35% chance for isolated and brief wind gusts exceeding 45 mph. These winds noticeable decrease Saturday night. The second half of the weekend temperatures begin to rebound into the mid to upper 80s across interior valleys Sunday afternoon as ensemble guidance shows the upper-trough quickly shifting eastward and upper-level ridging rebuilding offshore over the northeast Pacific. The hottest days over the next week are still expected Monday and Tuesday during which the vast majority of ensemble members show the ridge sliding right over- top the Pacific Northwest. There is high confidence (>90% chance) for high temperatures exceeding 90 degrees F across the Willamette Valley and southwest Washington lowlands on Monday and Tuesday with a 20-40% chance for temperatures exceeding 100 degrees F from Salem to Portland-Vancouver on Monday, increasing to 40-60% on Tuesday. Overnight lows will also be warm, especially across the central Willamette Valley, Columbia River Gorge, and Portland-Vancouver Metro Area where there is a 30-50% chance for Tuesday morning lows to remain above 65 degrees (highest chances across Portland-Vancouver Metro due to urban heat islands effects). Chances for lows remaining above 65 degrees fall to 20-35% Wednesday morning as onshore flow increases. Overnight lows near or above 65 degrees would provide limited overnight relief from the heat. As a result, there will be widespread Moderate HeatRisk across much of northwest Oregon and southwest Washington during this period, with localized Major HeatRisk across the Portland-Vancvouer Metro Area through the Columbia River Gorge from the warm overnight temperatures. The Extreme Heat Watch for these two areas remain in effect beginning Monday morning and continuing through Tuesday evening. Make sure to practice heat safety, including staying hydrated, wearing light-colored and loose- fitted clothing, wearing sun protection, and taking frequent breaks from the heat. If possible, schedule outdoor plans during the early morning or late evening when temperatures will be less intense. There still remains forecast uncertainty with exact progression of the upper-level ridge on Wednesday, however recent guidance has trended temperatures slightly warmer. Most of the global ensemble members (65%) show the ridge axis remaining over the Pacific Northwest and keeping temperatures into the 90s across interior valleys. Meanwhile, the remaining 35% of ensemble members have the ridge axis pushes further east into the Interior Northwest/Great Basin, which would usher in a return of weak onshore flow and "cooler" temperatures (80s to near 90). Still, within the latest NBM there is currently a 15-20 degree spread between the NBM 10th and 90th percentiles on Wednesday for the Willamette Valley and Portland Metro, with the coolest scenario being in the mid 80s while the warmest scenario pushes highs near 100 degrees F. Should the warming trend on Wednesday continue, heat related impacts may extend yet another day. At least there is more agreement among guidance for the ridge axis to nudging eastward Thursday, allowing temperatures to decrease by still above normal for June. By Friday, nearly 70% of ensemble members suggests troughing approaching the Pacific Northwest, returning chances for light precipitation and much cooler temperatures. Uncertainty remains with exactly how much precipitation we could see by the end of next week. -10/99 && .AVIATION...Satellite imagery as of early Saturday morning depicts widespread MVFR stratus along the coast and southern Willamette Valley (KEUG). Onshore flow will continue to support MVFR stratus backbuilding against the Cascade foothills and spreading across the Willamette Valley this morning between 12-18z Sat as the low level atmosphere moistens up. Guidance suggests that MVFR CIGs linger at along the north Oregon coast (KAST) throughout the TAF period, while the central Oregon coast (KONP) may get brief improvement to VFR conditions between 20z Sat-00z Sun. Willamette Valley terminals should improve to VFR after 18z Sat as daytime heating progresses and increases mixing. After 00z Sun, another surge of marine stratus will filter into the coast bringing a return of widespread IFR/MVFR CIGs. KPDX AND APPROACHES...Guidance suggests a 35-55% chance for MVFR CIGs at any given hour between 12-17z Sat. After 17-18z Sat, conditions improve to VFR with high clouds. West-northwesterly winds under 10 kt. -10 && .MARINE...High pressure offshore continues to maintain northerly to northwesterly winds over the next seven days. A Small Craft Advisory remains in effect across the outer waters (beyond 10 NM offshore) through 11 PM Saturday. Northwesterly winds will gradually weaken below 20 kt this morning as pressure gradients ease. Steep and choppy seas will continue until late Saturday, around 8 to 11 ft at 9 to 10 seconds. Seas subside to 5 to 7 ft Saturday into Sunday. Seas remain around 6 to 8 ft or less into early next week, with only a 5% chance for seas exceeding 8 ft at any given hour Mon-Wed. -10/12 && .PQR WATCHES/WARNINGS/ADVISORIES... OR...Extreme Heat Watch from Monday morning through Tuesday evening for ORZ109-111-112-120-122. WA...Extreme Heat Watch from Monday morning through Tuesday evening for WAZ206-207-209-210. PZ...Small Craft Advisory until 11 PM PDT Saturday for PZZ271>273. && $$ www.weather.gov/portland Interact with us via social media: www.facebook.com/NWSPortland x.com/NWSPortland

914 FXUS66 KMFR 201200 AFDMFR Area Forecast Discussion National Weather Service Medford OR 500 AM PDT Sat Jun 20 2026 .SHORT TERM... Key Points: * Showers and thunderstorm chances will be found in Northern California and Lake County this afternoon. * Temperatures will remain near to slightly above normal through the weekend. * Ridging takes control early next week, with 90s/low 100s forecast Monday and Tuesday. Radar shows a few showers moving east in Lake County, but they are overall light and have not produced lightning recently. Yesterday Klamath Falls received 0.02" of rainfall with Alturas in California receiving 0.03". Underneath high clouds, stratus is seen along the coast and in the Umpqua Basin on satellite. After starting out in the 40s/50s, temperatures will warm to the 60s for the coast, 80s for west side, and upper 70s/low 80s east. As the low moves eastward today, a shortwave will bring energy to the area. Forecast models are supporting a few cells in southern Lake County and portions of Siskiyou and Modoc counties in the afternoon. This will be less coverage than yesterday`s activity, and there will be a drier trend after. Breezy northwest winds will also come this afternoon. A ridge will build over the Pacific Ocean, and will begin impacting our area tomorrow. A thermal trough will bring warmer temperatures near 80 to the Brookings area tomorrow afternoon. Inland, upper 80s and 90s are forecast west of the Cascades with low/mid-80s east. .LONG TERM...Monday onward...The flow pattern becomes more zonal for the start of next week as temperatures begin to warm. A thermal trough will likely develop west of the Cascades by Sunday night into Monday and persist into Tuesday. High temperatures in Medford will approach the 100 degree mark on both Monday and Tuesday. Heat risk becomes elevated/moderate during these days as low temperatures cool into the lower 60`s. As a reminder, moderate heat risk affects those who are sensitive to heat, especially those without cooling. On a side note, the extreme forecast index(EFI) is showing values around 0.7-0.85 for maximum temperatures through Thursday west of the Cascades. These values suggest the ensembles are forecasting unusually warm temperatures for this time of year, yet by no means extreme. Conditions will begin to cool down by Thursday and Friday. -CZS && .AVIATION...20/12Z TAFs...A few showers persist in Lake County this morning. Very slight thunderstorm chances will persist too, but should stay well east of all terminals. A marine push brought MVFR/IFR to the coast, coastal valleys, and Umpqua Basin, including Roseburg. Some of these lower conditions are spreading into the lower Rogue Valley as well. All other areas should remain VFR, with the exception of lower flight conditions and gusty winds in any thunderstorms or heavy showers. && .MARINE...Updated 400 AM PDT Saturday, June 20, 2026...Fresh swell will keep steep seas in the outer waters this morning. North winds then increase this afternoon into early next week. This includes gusty, advisory strength northerly winds south of Cape Blanco, approaching gale force on Sunday afternoon through Monday evening. Meantime, steep seas are likely north of Cape Blanco in the outer waters through Sunday morning, and for all of the northern waters Sunday afternoon through Monday night. Long-term guidance suggests the thermal trough will stay in place next week, with guidance divided over a slight decrease or slight increase in winds for Tuesday into Thursday (including gales possible south of Cape Blanco, strongest south of Gold Beach). && .MFR WATCHES/WARNINGS/ADVISORIES... OR...CA...None. PACIFIC COASTAL WATERS...Small Craft Advisory from 2 PM this afternoon to 2 PM PDT Sunday for PZZ356-370-376. Gale Watch from Sunday afternoon through Monday evening for PZZ356-376. && $$

928 FXUS66 KEKA 200709 AFDEKA AREA FORECAST DISCUSSION National Weather Service Eureka CA 1209 AM PDT Sat Jun 20 2026 .SYNOPSIS...Generally cool and moist conditions continue today with Isolated thunderstorms possible again in northern Trinity County. Warmer and drier conditions are likely early to mid next week. && .KEY MESSAGES... - Isolated thunderstorms are possible again in Trinity County Saturday. - Warming trend returns next week. && .DISCUSSION...An upper level trough continues to exert influence over Northwest California. Increased cloud cover today will maintain cooler interior valley temperatures in the upper 70s to 80s. The trough will continue eastward today; however, some lingering moisture and instability could bring isolated thunderstorms/showers for the interior again. The highest chances are in the Trinity Horn and possibly the Yolla Bollys, but activity is still expected to diminish compared to yesterday. A warming trend will begin Sunday and continue into early next week. Temperatures in the 90s to near triple digits are possible again by Monday. Generally minor to moderate HeatRisk is expected, with heat largely remaining below advisory levels. Troughing to the north of the area on Tuesday and Wednesday could bring additional chances of interior thunderstorms. Confidence is not high as instability and moisture currently look meager, but this will need to be watched. JB && .AVIATION...MVFR to IFR ceilings will continue to fill in along the coast early this morning. MVFR ceilings will continue for KUKI through sunrise, with valley fog possible due to recent rains and high dewpoints. Some scattering of clouds could be expected for coastal terminals with coastal stratus expected to fill back in tonight. && .MARINE...Winds and seas have generally dropped to gentle or even calm across all waters. There is a minor, but persistent, mid period northwest swell around 4 to 5 feet that may be more obvious with the milder seas/winds. North winds will gradually increase again this weekend with near gale force gusts in the outer waters by Sunday afternoon. These winds will pull closer to shore brining steep, short period seas to all waters through early next week. && .EKA WATCHES/WARNINGS/ADVISORIES... CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory from 9 PM this evening to 3 AM PDT Monday 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

132 FXUS66 KMTR 201219 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 519 AM PDT Sat Jun 20 2026 ...New AVIATION... .KEY MESSAGES... Updated at 1245 AM PDT Sat Jun 20 2026 - Hazardous beach conditions with increased risk of sneaker waves and strong rip currents continue through the extended forecast - Minor HeatRisk with below normal temperatures through the weekend - Warmer temperatures and Moderate HeatRisk concerns return by midweek across the interior && .SHORT TERM... Issued at 1245 AM PDT Sat Jun 20 2026 (Today and tonight) The pattern overall will remain similar today as a broad upper level trough sits overhead. Stratus will expand across most areas this morning within a marine layer around 3000 feet deep. Drizzle may develop along the coast this morning as well, resulting in locally slick roadways. The deep marine layer and continued onshore flow will keep temperatures similar to yesterday, with highs along the coast ranging from the upper 50s to around 70. Inland, temperatures will remain below normal with highs reaching the 70s to lower 80s. Clouds should retreat back to the coast this afternoon, giving way to sunny skies in most areas. However, clouds may not fully erode in coastal areas due to onshore flow and orographic effects. Onshore winds will once again be breezy this afternoon and evening with gusts 15-30 mph, strongest in gaps/passes. The marine layer will begin to compress tonight as the upper level trough weakens. Marine stratus will still fill in most valleys tonight, but the extent should be lower overall. Patchy fog will also be possible along the coast and in wind-sheltered valleys. && .LONG TERM... Issued at 1245 AM PDT Sat Jun 20 2026 (Sunday through Friday) The upper level trough will continue its weakening trend on Sunday and the marine layer will compress further. Decreasing marine influence and warming temperatures aloft will begin a warming trend, especially inland, where many locations will reach the 80s, with a few readings approaching 90 degrees in the warmest spots. The warming trend will continue Monday and Tuesday as a broad ridge builds across the western U.S. Highs will reach the 80s and 90s through the week across the interior. Hot temperatures will be accompanied by the potential for Moderate HeatRisk and increased heat impacts, although overnight cooling limits concerns somewhat. Closer to the coast, confidence in the temperature forecast is lower, but at least some warming is expected. More significant warming along the coast/SF Bay shoreline could develop if a weaker onshore or offshore wind pattern occurs, but confidence in this scenario is low. This potential will continue to be monitored as we head into next week. As mentioned in previous discussions, ensemble guidance continues to indicate moisture rotating north around the upper ridge centered over the Desert Southwest. By Wednesday and Thursday, there is a low (around 10%) chance that the moisture and accompanying instability makes it far enough west to bring a threat for thunderstorms to the Bay Area and Central Coast. Overall, the chance of this scenario occuring is low, but it could have a large impact. While the current forecast package does not include thunderstorms, this potential will continue to be closely monitored over the coming days. && .AVIATION... (12Z TAFS) Issued at 442 AM PDT Sat Jun 20 2026 Low clouds have settled into coastal areas and adjacent valleys this morning. Some areas may see patchy drizzle with very light accumulations. Stratus will recede back off land around 17 to 19Z Saturday with VFR conditions prevailing through the early evening. Low clouds returning to most coastal TAF sites near 1500-2000ft after 04Z Sun, after 06Z for areas further inland. Vicinity of SFO...Weaker SW winds expected through the morning. Cigs scattering out with winds increasing near 15 kts after 19Z Saturday. Cigs returning similar timing to last evening ~ 07Z Sun, though lower near 1500-1800ft. Confidence in timing moderate to high, confidence in cig heights moderate. SFO Bridge Approach...SW wind pattern is similar to SFO. MVFR cigs clearing at a similar time to SFO this morning, becoming VFR by 19Z. Cigs 1500-1800ft returning slightly earlier than SFO (03-04Z Sunday). Vicinity of SJC and OAK...MVFR ceilings scattering near 17-19Z, confidence higher for earlier clearing at SJC. Typical diurnal winds out of the W/NW this afternoon. Cigs near 1600-1900ft returning earlier at OAK (05-07Z Sun) than SJC (10-12Z Sun), lower confidence in exact timing of cig impacts at SJC. Monterey Bay Terminals...Cigs near 2500-3000ft this morning will scatter out around 18-20Z with moderate confidence on timing. VFR conditions prevail through the afternoon with cigs returning near 04-06Z Sun near 1500-1800ft. Typical diurnal winds out of the W/NW expected Saturday across the bay. && .MARINE... (Today through Thursday) Issued at 308 AM PDT Sat Jun 20 2026 Light winds today will increase across the northern outer waters later tonight and persist through early Monday morning, while remaining relatively light across the remainder of the inner and outer waters. Long period southwest swell is likely to continue through the remainder of the extended forecast period. && .BEACHES... Issued at 308 AM PDT Sat Jun 20 2026 Long period southerly swell at around 15 to 17 seconds will persist for the remainder of the weekend, and increase to 17 to 19 seconds by the middle of the upcoming work week as energetic storms in the Southern Hemisphere continue to affect the California coast, especially for south and southwest facing beaches. Hazardous beach conditions are advertised, specifically for moderate to steeply sloped beaches along the Pacific Coast of the North Bay, San Mateo, Santa Cruz counties. A Beach Hazards Statement for Pacific Coast beaches continues through Wednesday afternoon. Be sure to check beach conditions before you head out. Sneaker waves will run up the beach much farther than other waves, potentially catching beachgoers by surprise and resulting in people being swept into the water. Rip currents are strong enough to pull the strongest swimmers away from shore. Swim near a lifeguard if possible. Stay back from the beach, and away from jetties, piers, beachside rocks, and other infrastructure near the water. Never turn your back to the ocean! && .MTR WATCHES/WARNINGS/ADVISORIES... CA...Beach Hazards Statement through Wednesday afternoon for CAZ006- 505-509-529-530. PZ...Small Craft Advisory from 9 PM this evening to 3 AM PDT Monday for Pt Arena to Pt Reyes 10-60 NM. && $$ SHORT TERM...Tangen LONG TERM....Tangen AVIATION...APR MARINE...JM 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

390 FXUS66 KOTX 201153 AFDOTX Area Forecast Discussion National Weather Service Spokane WA 453 AM PDT Sat Jun 20 2026 .KEY MESSAGES... - Warm temperatures and dry conditions continue. Tuesday and Wednesday next week will be our warmest days over the next week with highs in the upper 80s to mid 90s. - A cold front will bring dry and breezy to windy conditions on Saturday, particularly over central Washington, with critical fire weather conditions expected. && .SYNOPSIS... A cold front will then brush across the region on Saturday and bring breezy to gusty winds across central Washington and a return for increased fire weather concerns. Little to no precipitation is expected through the middle of next week. Warm temperatures and dry conditions continue into next week. && .DISCUSSION... HOT, DRY AND BREEZY CONDITIONS SATURDAY... Today through Sunday: A Low passing through Southern BC will swing a dry cold front across the Inland Northwest. Ensembles have decent agreement on the timing and track of the Low. The front will bring gusty winds starting mid morning and continue into the evening. Highest winds will be through the Okanogan Valley and the western Columbia Basin including Wenatchee and Moses Lake. These areas have probabilities of 50-70% for sustained winds above 20 mph and gusts above 35 mph. Minimum humidity will be in the teens to low 20 percent. These conditions have led to a Red Flag being issued for these areas with rapid fire spread concerns. The front will bring slightly cooler temperatures through Sunday with highs a few degrees cooler than Friday. The only chance for precip for the region will be on Sunday and over the extreme North Idaho Panhandle. A trace to couple of hundredths are only expected. HeatRisk will be mainly minor through the weekend. Overnight lows will be in the 50s. Monday through Friday: For the start of next week, models are in fairly decent agreement of high pressure ridge leading stable warm, dry pattern. Temperatures climb back into the upper 80s and 90s. Wednesday has breezy winds through the Cascade Gaps as a thermal trough sets up along the Cascades with gusts into the 20s to low 30s mph. Ensembles show the ridge breaking down for the end of the week into the weekend. While agreement on timing is still pretty low, it is expected to be cooler with increased precip chances across the region for the weekend. /JDC && .AVIATION... 12Z TAFs: VFR conditions expected through the TAF period with passing mid to upper level clouds. A cold front passage will result in winds gusts increasing around 15-19Z to 15-25kts for most terminals. These gusty winds are expected to continue into the through 03Z. FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: High confidence in VFR conditions at all terminals through the forecast period. High confidence in timing of wind increase. ----------------------- 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 86 54 82 52 83 53 / 0 0 0 0 0 0 Coeur d`Alene 84 53 80 52 82 53 / 0 0 0 0 0 0 Pullman 80 51 78 48 81 50 / 0 0 0 0 0 0 Lewiston 88 56 86 55 89 57 / 0 0 0 0 0 0 Colville 84 49 81 47 85 50 / 0 0 0 0 0 0 Sandpoint 82 50 77 50 79 52 / 0 0 10 0 0 0 Kellogg 81 51 77 50 80 52 / 0 0 0 0 0 0 Moses Lake 89 56 87 58 89 57 / 0 0 0 0 0 0 Wenatchee 86 59 86 62 89 64 / 0 0 0 0 0 0 Omak 86 57 85 55 88 58 / 0 0 0 0 0 0 && .OTX WATCHES/WARNINGS/ADVISORIES... WA...Red Flag Warning from 3 PM this afternoon to 11 PM PDT this evening for Foothills of Central Washington Cascades (Zone 705)-Waterville Plateau (Zone 706)-Western Columbia Basin (Zone 707). Red Flag Warning from 11 AM this morning to 11 PM PDT this evening for Okanogan Valley (Zone 703). ID...None. && $$

255 FXUS66 KPDT 201150 AFDPDT Area Forecast Discussion National Weather Service Pendleton OR 450 AM PDT Sat Jun 20 2026 .KEY MESSAGES... - Critical Fire Weather conditions will occur today as dry and locally breezy conditions develop. - Heat Risk values increase starting early next week as an offshore ridge pushes through the area. - Dry conditions prevail through at least the second half of next week. && .DISCUSSION... Today through Sunday: Satellite currently shows high FEW to SCT clouds across the region, with radar showing very light showers in eastern Grant and southern Wallowa counties. Precip will dry out by the morning hours, paving the way for drier conditions later on. Forecast wise, the latest deterministic guidance from the EURO and GFS currently show a shortwave passing through the region, which will help in the development of locally breezy winds across the region. With relative humidities during the day ranging from 10-20% and the previously mentioned breezy winds, critical fire weather concerns will occur from the Kittitas Valley down to the Columbia Basin down to Central Oregon. Fire weather zones WA690, WA691, OR691, and OR700 have been warned for Red Flag Warnings through much of today as a result. Monday through Wednesday: A ridge currently situated just offshore in the Pacific will continue to push on-shore through the next several days. Current guidance is in good agreement the ridge axis will move over the area sometime late Monday night through Tuesday morning (>90% chance). This will initiate a warming trend early next-week through mid next-week with the hottest days looking to be Tuesday and Wednesday (60-80% chance). NBM has slightly trended down with the high temperatures compared to last night, shying further from the triple digits. Latest NBM still only advertises the chances of triple digits reaching the lower elevations at 0-20%, with a somewhat slight downtrend compared to 24-hours ago. Regardless, widespread moderate heat risk through the region will develop Tuesday & Wednesday with isolated major heat risks across the Columbia Basin at this time. Confidence in major heat risk (40-70% chance) has initiated an extreme heat watch for The Dalles on Tuesday. Still plenty of time to monitor for trends and if additional high lights are warranted. && .AVIATION /12Z TAFS THROUGH 12Z SUNDAY/... VFR conditions currently prevail through all of the TAG sites with no CIG or VIS issues expected. The main weather highlight this period will be the breezy winds developing through the late morning to afternoon hours. Breezy winds currently initiate at DLS and PDT and is expected to prevail through the remaining TAF period, though PDT will see winds weakening more so than DLS by 07Z. Other sites will initiate with lighter winds with peaking 20-30 knot gusts starting around the late morning/afternoon hours through the early evening hours. && .Preliminary Point Temps/PoPs... PDT 84 51 84 52 / 0 0 0 0 ALW 86 56 85 57 / 0 0 0 0 PSC 91 55 89 56 / 0 0 0 0 YKM 90 54 88 57 / 0 0 0 0 HRI 86 54 87 55 / 0 0 0 0 ELN 81 52 84 54 / 0 0 0 0 RDM 83 41 83 46 / 0 0 0 0 LGD 83 47 81 48 / 0 0 0 0 GCD 86 44 84 45 / 10 0 0 0 DLS 81 55 89 60 / 0 0 0 0 && .PDT WATCHES/WARNINGS/ADVISORIES... WA...Red Flag Warning from 3 PM this afternoon to 8 PM PDT this evening for WAZ691. Extreme Heat Watch from Monday morning through Tuesday evening for WAZ024. Wind Advisory from 3 PM this afternoon to midnight PDT tonight for WAZ026. Red Flag Warning from 4 PM this afternoon to 8 PM PDT this evening for WAZ690. OR...Red Flag Warning from 3 PM this afternoon to 8 PM PDT this evening for ORZ691-700. Extreme Heat Watch from Monday morning through Tuesday evening for ORZ041. && $$ DISCUSSION...95 AVIATION...95

625 FXUS65 KREV 200708 AFDREV Area Forecast Discussion National Weather Service Reno NV 1208 AM PDT Sat Jun 20 2026 .KEY MESSAGES... * Isolated showers and thunderstorms continue today for northeast CA and northwest NV, with possible fire, aviation, and recreational impacts. * Seasonal temperatures and mostly dry conditions across the area this weekend * Above average temperatures return by the start of next week, with typical afternoon breezes. && .DISCUSSION... * After an active Friday weather-wise, today will have far less coverage of showers and storms. There remains a slight 15-25% chance of showers and thunderstorms, stretching from northeast CA eastward through northern Washoe into northern Pershing County. The main culprit is the larger scale trough still over the area that is interacting with daytime heating. The primary concerns will be locally heavy rain, small hail, wind gusts up to 40 mph. Per SPC fire weather outlooks, there still exists a 10% chance for dry storms with new lightning ignitions outside of the main storm cores. * The aforementioned trough will eventually exit the region by Sunday. This will keep us with near average temperatures throughout the area this weekend. Afternoon reading in western NV valleys will end up in the upper 80s to near 90 degrees, while the Sierra communities will be in the mid-70s to low 80s. For reference, average highs for western NV are near 90 degree and near 80 degrees in the Sierra communities. * By Monday into next week, a large scale high pressure starts to setup and build over the southwest US. This will allow for temperatures to increase back above seasonal normals by Monday all the way through into Friday. This will reintroduce widespread moderate HeatRisk for western NV and lower valleys. So while hot temperatures are in store for next week, at least it`s not looking like an intensive heat wave. By Friday onward, ensembles are showing another possible ridge breakdown, with increasing winds and low precipitation chances. -McKellar && .AVIATION... * VFR conditions at all western NV and eastern Sierra terminals on Saturday and Sunday. * Also, expect typical west winds in the afternoon to early evening with sustained 10-15 kts with gusts of 20-25 kts. -McKellar && .REV Watches/Warnings/Advisories... NV...None. CA...None. && $$

646 FXUS66 KSTO 191939 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 1239 PM PDT Fri Jun 19 2026 For additional details on weather and expected impacts over the next 7 days, please visit weather.gov/sto/briefing. .KEY MESSAGES... - Scattered wet and dry thunderstorms will result in critical fire weather conditions in Shasta County today. - Elevated fire weather concerns elsewhere in the mountains north of I-80 due to isolated showers and thunderstorms. - Warming trend next week with minor to moderate HeatRisk. && .DISCUSSION... Current satellite and radar has reflectivity over the northern portions of the CWA in Shasta, Glenn, Tehama, Butte, and Plumas counties. Observations across the area have some precipitation reaching the surface while in other regions it is not. We have seen reports of dry thunderstorms at times around Shasta county over the past couple of hours. CAMS have continued to show the main area of forcing moving further into the higher terrain as we move into the afternoon hours. Atmospheric soundings around Shasta County and into the southern Cascades have continued to show inverted V structures in the lower levels for parts of the higher turns, with only slight disagreements between models. Instability and lift start to dwindle in the evening hours, with the threat for thunderstorms dropping. Areas that experience the wet thunderstorms could see up to a quarter of an inch for rainfall. Lightning from the isolated dry thunderstorms or outside the main precipitation cores in wet thunderstorms could create new fire starts and may combine with strong outflow winds to cause a fire to rapidly row. Our confidence is low on the coverage and wet vs dry for thunderstorms. None the less, Shasta county remains in a Red Flag Warning for critical fire weather conditions due to the scattered dry thunderstorms. Other areas see elevated fire weather concerns in the mountains north of I-80 where dry thunderstorm chances are isolated. A few storms this afternoon could be on the stronger side, bringing small hail and gusty outflow winds. The main shortwave providing the support for thunderstorm activity continues to move east across CA and into the Great Basin Saturday. Lingering instability and moisture will help fuel further chances for isolated thunderstorms around Shasta county tomorrow afternoon and into parts of the evening hours. Confidence is low on the coverage, the chance for isolated dry thunderstorms, and how far south the instability reaches into Shasta county. Elevated fire weather conditions are expected around Shasta county tomorrow due to the threat of isolated thunderstorms. The upper level pattern begins to shift, and we introduce high pressure into the area Sunday and into next week. Temperatures warm and conditions dry out with low RH values within portions of the Valley. Winds at this time have remained on the lower side, but we will continue to monitor any chances for fire weather conditions next week. && .AVIATION... VFR conditions are expected to continue through the TAF period. There will continue to be a chance for an isolated shower or thunderstorm around RDD and RBL through 23z this afternoon. Otherwise, areas are seeing SKC to FEW cloud coverage. Winds from the Delta will increase for the Sacramento sites this evening and into the early overnight, with gusts up to 20kts. Winds overnight go light and variable for the sites. && .STO WATCHES/WARNINGS/ADVISORIES... Red Flag Warning until 7 PM PDT this evening for Burney Basin-E. Shasta /S. Cascades Above 3000 ft-Shasta County Foothills 1000- 3000 ft-Shasta Lake Area & 1-5 1000-3000 ft-Shasta Metro-W. Shasta County 1000-3000 ft-W. Shasta County Above 3000 ft. && $$

917 FXUS65 KMSO 200957 AFDMSO Area Forecast Discussion National Weather Service Missoula MT 357 AM MDT Sat Jun 20 2026 .DISCUSSION... KEY MESSAGES: - Thunderstorms return to Lemhi County, Idaho, and southwest Montana with the weather pattern during weekend, bringing lightning and brief, erratic wind gusts - Warming trend Tuesday through Thursday - Cooler and showery conditions expected next weekend Two weak disturbances will be interacting over the Northern Rockies today into Sunday. The first disturbance is located over the Great Basin region pushing in some monsoonal moisture into Lemhi county and southwest Montana. The other disturbance will be dropping out of British Columbia today into Sunday, limited the northward progression of the monsoonal moisture. This afternoon the best chance of shower and thunderstorm activity will be mainly across Lemhi county into southwest Montana, but a few storms could develop as far north as Missoula up to Seeley Lake/Ovando region. These storms will be capable of producing gusty erratic winds, lightning and brief heavy rain. The shower activity is expected to diminish after sunset this evening. The British Columbia disturbance will continue to track along the Canadian border on Sunday causing wrap around shower activity across northwest Montana. This disturbance will also push in cooler air causing temperatures to be near seasonal averages for Sunday into Monday. A ridge of high pressure will be building over the region Tuesday through Thursday. Temperatures will be steadily climbing each day with Wednesday and Thursday potentially being the warmest days so far this year. Most valley locations should be in the upper 80s to low 90s by Wednesday afternoon with the lower valleys of north central Idaho breaking the century mark. The far majority (over 75%) of the long term models are showing a trough of low pressure moving into the Pacific Northwest by next weekend causing cooler conditions along with widespread shower activity. && .AVIATION...Moisture will continue to push into Lemhi county and southwest Montana today causing scattered showers. Instability this afternoon will lead to the potential development of thunderstorms that could impact KSMN and KBTM. These storms will be capable of producing gusty erratic winds, lightning and brief heavy rain. KMSO and KHRF have a lower probability of being impacted by these storms. The shower activity is expected to diminish after sunset this evening. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...None. ID...&& $$

652 FXUS65 KBOI 201149 AFDBOI Area Forecast Discussion National Weather Service Boise ID 549 AM MDT Sat Jun 20 2026 .UPDATE...Updated aviation discussion. && .KEY MESSAGES... - Scattered showers today with scattered thunderstorms developing this afternoon. - Daytime temperatures cooling to 5 degrees above normal through Sunday, then hotter and drier Monday through Wednesday with temperatures around 10 to 15 degrees above normal. && .SHORT TERM /Through Monday Night/... Issued 401 AM MDT SAT JUN 20 2026 A weak system is moving northeastward over the Great Basin into southwest MT this afternoon. Scattered showers moving over the area today with light rain showers this morning. As the system moves northeast, partial clearing will lead to destabilization this afternoon, with scattered thunderstorms developing during the afternoon. Breezy west-northwest winds this afternoon, strongest in the Magic Valley. Drier air moves into the area on Sunday with afternoon west-northwest breezes. A ridge strengthens over the area on Monday with warmer temperatures. Temperatures will be around 5 degrees above normal through Sunday before a slight warming trend Monday. && .LONG TERM /Tuesday through Saturday/... Issued 401 AM MDT SAT JUN 20 2026 A ridge will strengthen and remain over the area through at least Wednesday. Temperatures will be 10 to 15 degrees above normal with values 95-100F in the lowest valleys Tuesday and Wednesday. Near record highs possible on Wednesday afternoon, with BOI forecast of 98F tying the record of 98F set in 1992. Models indicate an upper level trough moving into the Pacific Northwest sometime between Thursday and Saturday. This system will bring much cooler temperatures and unsettled conditions by Friday and Saturday. && .AVIATION /12Z Saturday through Sunday/... Issued 545 AM MDT SAT JUN 20 2026 Scattered rain showers with mountain obscuration. Scattered thunderstorms developing this afternoon, capable of erratic outflows to 25-45 kt, brief heavy rain, small hail, blowing dust. Surface winds outside of storms: variable 10 kt or less, then W-NW 5-15 kt with gusts to 20-25kt Sat PM. Winds aloft at 10kft: W-NW 5-20 kt. KBOI...VFR. Mountains obscured NE of terminal in precipitation. Showers through 18-21Z. Surface winds: variable 10kt, becoming NW 5-15kt this afternoon. Sunday Outlook...VFR and clearing skies Saturday night and Sunday, with breezy W-NW winds Sunday afternoon. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...Red Flag Warning until 6 PM MDT this evening for IDZ423-426. OR...Red Flag Warning until 5 PM PDT this afternoon for ORZ670-672. && $$ www.weather.gov/Boise Interact with us via social media: www.facebook.com/NWSBoise www.x.com/NWSBoise AVIATION.....KA SHORT TERM...KA LONG TERM....KA

151 FXUS65 KLKN 201153 AFDLKN Area Forecast Discussion National Weather Service Elko NV 453 AM PDT Sat Jun 20 2026 .KEY MESSAGES... * Expect afternoon high temperatures to cool into the 80s today * Incoming weather system increases chances for thunderstorms and light precipitation through today mainly across the north * Warming temperatures and drier conditions expected early next week with highs back in the 90s for all locations && .DISCUSSION... (Today through next Saturday) WEATHER PATTERN OVERVIEW: Skies have been scattering out during the early morning hours with occasional strikes in portions of Elko county this morning. Surface dewpoints have come up considerably versus twenty-four hours ago. A disturbance will be affecting portions of central and northern Nevada today. CAPE values remain robust at 300-700J/kg with negative lifted indices. Storm motions have continued to remain rather fast at 20 to 25KT which will limit the residence time storms will have overhead. Upgraded to red flag warning as a result; please see fire discussion below. Highs today will be cooler than what was experienced yesterday with readings in the 80s. Look for the weather to quiet down during the overnight with lows in the 40s and 50s. Sunday through late next week, look for a period of quiet weather through the period with highs coming back into the 90s by early next week and mid to upper 90s by mid-week. Lows will be in the 40s and 50s. FORECAST CONFIDENCE & DEVIATIONS: Many changes were again made to the NBM forecast in the near term due to fire weather concerns. These include modifying the PoP/Wx/Sky grids so that isolated to scattered dry thunderstorms were depicted for portions of northern Nevada for the late morning to afternoon period. Modifications were also made to increase the wind speeds/gusts in the near term as well. Confidence is moderate with respect to the coverage and timing of dry thunderstorms in northern Nevada this afternoon and into the weekend. High confidence in cooler temperatures today and tomorrow with moderate confidence in warming conditions early next week. && .AVIATION... VFR conditions will continue through the next 24 hours. VCTS is expected across the terminals KWMC-KBAM-KEKO-KENV-KELY after 17Z this morning. Expecting gusty and erratic winds to 45KT with any thunderstorm along with brief +TSRA. Breezy W-NW10-15G20-30KT expected to develop across all TAF sites later this morning and afternoon. KWMC ASOS observation currently unreliable at this time. KWMC TAF is AMD NOT SKED. && .FIRE WEATHER... Upgraded the fire weather watch to red flag this morning as isolated to scattered dry thunderstorms will re-develop once again across portions of northeastern Nevada throughout the afternoon period. Even with low cloud bases, the fast moving nature of these storms will mitigate the effects of precipitation across northeastern Nevada. Any storms that do form will have the potential to produce strong, erratic wind gusts to 55 mph. The threat for storms will be dissipating later this evening and into the overnight, leaving dry and gradually warming conditions through next week. && .LKN Watches/Warnings/Advisories... Red Flag Warning from 900 AM PDT today through 500 PM PDT this afternoon for NVZ438-469-470 && $$ DISCUSSION...86 AVIATION...86 FIRE WEATHER...86