068 FXUS66 KSEW 220857 AFDSEW Area Forecast Discussion National Weather Service Seattle WA 157 AM PDT Sun Mar 22 2026 .SYNOPSIS...A weak system will brush the region this morning. Active weather returns by Tuesday for more rain, high elevation snow and gusty winds. Showers and a convergence zone will form on Wednesday with onshore flow. Drier weather will prevail late in the week and weekend. && .SHORT TERM /TODAY THROUGH TUESDAY/...A weak front will brush through western WA this morning with isolated to scattered showers. High pressure will build inland this afternoon for drier conditions. Expect partly sunny conditions with highs in the upper 40s to lower 50s. High pressure and offshore flow will prevail on Monday for dry weather. Morning lows will be a little cooler with lows in the 30s, and temps near freezing around the south sound. A stronger and wetter Pacific frontal system will impact the area on Tuesday. This system is tied to a deep low spinning offshore that will shift north of Haida Gwaii. The main threat will be gusty south winds, primarily coast and north part, where probabilities of gusts exceeding 45 mph are the highest. Up in the mountains, snow levels are lowest over the northern Cascades where a few inches of snow will fall. Snow levels will be rising over 5,000 ft in the central Cascades thus minimizing impacts to I-90 and US 2. Rivers will see small rises but additional flooding is not anticipated. 33 && .LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/...We remain under moderate onshore flow on Wednesday with high pressure offshore and deep low pressure to our north. Snow levels are lower, around 2,500 ft, with snow in the Cascades and passes. Showers with a convergence zone may enhance snow amounts near Stevens Pass. High pressure shifts inland Thursday, Friday, Saturday for drier weather across the board. Expect warner highs in the interior Friday and Saturday with lower 60s possible. Dry offshore flow will keeps lows cool and in the 30s. 33 && .AVIATION...Zonal flow will continue to prevail across western Washington today. A weak and mostly dry front is moving across the area early this morning. This will bring increased ceilings this morning, but conditions are expected to remain mostly VFR. Chances for MVFR cigs this morning remain below 15-25% across the area terminals. Ceilings will lift and scatter through the late morning, with high clouds dominating the skies through the remainder of the day and tonight. Winds this morning are mostly light and variable, through remain south/southeasterly through Puget Sound area. Winds are expected to continue to ease through the morning, switching to light northerly at around 19-20Z early this afternoon, increasing to around 8 to 12 kt by 00Z Mon and remain like so through much of tonight. KSEA...VFR conditions are expected to prevail through the TAF period. CIGs will gradually redevelop this morning as a dry front moves through the area. This will be relatively short lived as clouds scatter by this afternoon and high clouds prevail through the remainder of the period. S winds will gradually decrease through the morning, turning N by 20Z, and increasing to 8 to 12 kt after 00Z Mon through the end of the period. 62 && .MARINE...A weak and mostly dry front is currently traversing the coastal waters early this morning. Winds across the far northern portions of the coastal waters, as well as the west entrance to the Strait of Juan de Fuca remain a bit elevated with gusts up to 20-23 kt, but these winds should ease through the morning. Otherwise, high pressure will continue to dominate across the area through Monday. Seas will remain in the 5-8 ft range through Monday as well. The focus then turns towards Tuesday as a strong low pressure system moves into the region from the southwest. Uncertainty remains to the exact track of the system, but stronger winds and increasing seas are likely across the coastal waters. The NBM indicates that at least Small Craft Advisory winds are very likely (>90%) across all the coastal and interior waters, with 40- 60% chance of gale force winds across the coastal waters on Tuesday. GEFS ensemble guidance continues to show a 50-70% chance of seas exceeding 20 ft Tuesday night into early Wednesday. 62 && .HYDROLOGY...River continue to recede with dry conditions. Most flood warnings will end today. The Cedar River at Renton will remain near Minor Flood stage through Monday due to dam releases. No other river flooding expected over the next 7 days. && .SEW WATCHES/WARNINGS/ADVISORIES... WA...None. PZ...None. && $$

690 FXUS66 KPQR 220920 AFDPQR Area Forecast Discussion National Weather Service Portland OR 220 AM PDT Sun Mar 22 2026 .SYNOPSIS...Dry weather and near normal high temperatures through Monday with morning low temperatures in the 30s, producing widespread frost. A weather system brings widespread rain and breezy winds Tuesday into Wednesday along with light Cascades snow Tuesday night into Wednesday. No snow or flooding impacts expected. Dry weather returns Thursday into Friday. && .DISCUSSION...Sunday through Saturday...Mostly clear skies are being observed on satellite imagery across NW OR and SW WA early Sunday morning under building surface high pressure and zonal flow aloft. A weak cold front will graze far NW OR and SW WA coast later this morning with mid- level clouds and a 15-25% chance of scattered showers through around 8-10 AM. Temperature observations at 2 AM show most locations across the interior lowlands have fallen to the mid to upper 30s, except for low 40s in the Portland metro area. Temperatures will continue dropping over the next few hours with low temperatures at most locations reaching the low 30s. Expecting widespread frost with light winds and mostly clear skies this morning. Patchy fog is also a possibility for areas that remain above 34 degrees. This pattern continues into Monday with daytime temperatures peaking in the upper 50s and another round of cooler low temperatures Monday morning. However, low temperatures will be slightly higher than this morning, in the mid to upper 30s, leading to less widespread frost development. Note that NWS Portland will not begin issuing Frost Advisories and Freeze Watches/Warnings for agricultural purposes until April 1st as this is when the growing season begins to ramp up and impacts from frost and freeze conditions become more significant. Expect increasing cloud cover through the day on Monday as the next weather system approaches the PacNW. Ensemble guidance remains in excellent agreement that a surface closed low pressure system will move northeast into British Columbia with a trailing cold front moving east into WA and OR Tuesday into Wednesday. This cold front will bring widespread rain and breezy winds to NW OR and SW WA. There is some uncertainty on how long rain will last into Wednesday night or Thursday morning as some ensemble members indicate moisture will continue into Thursday morning while others cut off moisture by late Wednesday night. The terrain and lowland locations along and north of the Columbia River have better chances for showers continuing into Thursday morning, though QPF amounts are on the low end by this time. Overall, although this system will bring widespread rain, impacts are expected to be limited. 48 hour QPF ending at 5 AM PDT Thursday is around 0.25-0.75 inches for the interior lowlands, 0.5-1.5 inch for the coast, Coast Range, and Willapa Hills, 0.5-1.5 inch for the north Oregon Cascades, and 0.75-2 inches for the SW Washington Cascades. Flooding impacts are not expected from this system. In terms of Cascade snow, the heaviest precipitation is expected to fall ahead of and along the cold front on Tuesday when snow levels are generally higher than pass level. Snow levels will fall quickly after the front passes late Tuesday into Wednesday to around 3500-4500 ft by Wednesday morning. However, the lowest snow levels will be in SW WA Cascades with snow levels rising moving south into the central OR Cascades. As showers will continue into Wednesday, there is the potential for some accumulating snow at pass level, though due to the current sun angle along with warmer road temperatures, it might be difficult for much accumulation in scattered showers. Snow levels will continue falling through Wednesday, especially Wednesday night, falling to around 1500-3000 ft by Thursday morning. The 10th percentile (only 10% chance of snow levels this low) does indicate snow levels could fall as low as 500-1500 ft by Thursday morning. However, if precipitation really is decreasing by this time, then there will be limited precipitation to even cause snow. Only a few ensemble members suggest any kind of accumulating snow in the interior lowlands north of Portland, and generally less than an inch. NBM probabilities for 6 inches of snow or more in a 48-hour period ending at 5 AM PDT Thursday continue to back this expectation up, as chances are only around 5% at Willamette and Santiam Passes, and 10-20% along Highway 26 near Government Camp. Breezy southerly winds are also expected with the frontal passage on Tuesday. Strongest winds will be along the coast, Coast Range, and Willapa Hills where there is a 60-80% chance of maximum wind gusts exceeding 40 mph. Inland, this probability drops to only a 10-20% chance, highest in the central Willamette Valley south of the Portland metro area to the Salem area. Chances for maximum wind gusts exceeding 30 mph for inland areas increase to around 50-75%, so most likely scenario is peak wind gusts of 30-35 mph for inland locations and 40-45 mph along the coast as the front passes. By Thursday afternoon into Friday, the weather system is expected to move out of the area with upper level flow becoming more zonal. Expecting dry conditions with clearing skies by midday Thursday, which could allow for temperatures to warm into the upper 50s on Thursday and into the low to mid 60s for Friday and Saturday for the interior lowlands. Saturday is expected to be the peak day of the warming trend, and NBM indicates a 20-30% chance of temperatures reaching 70 degrees across the Willamette Valley. -03 && .AVIATION...Dry, westerly flow aloft with predominately VFR conditions through the TAF period. A weak surface front is slated to graze the SW WA and far NW OR coast around 12-15z Sunday, causing a 15-20% chance of isolated showers and an increase in mid-level clouds with a 20-40% chance of MVFR ceilings between 10-16z Sun. Winds remain generally from the north and under 10 kt through around 17-20z Sun, when winds increase to around 8-12 kt at interior terminals and 12 to 15 kt with gusts up to 21 kt at coastal terminals south of Clatsop County. Inland winds decrease below 8-10 kts after 02z Mon and coastal winds after 04-06z Mon. Clear skies and light winds early Saturday morning will support temperatures dropping towards the low to mid 30s, resulting in potential frost development over metal surfaces (generally around 09-16Z Sun). KPDX AND APPROACHES...VFR conditions through the TAF period. Northwesterly winds under 8 kt until around 18-20z Sun, then increasing to around 8-10 kt through around 02z Mon. Potential for widespread frost over metal surfaces between 09-16z Sun due to clear skies and calm winds. -03 && .MARINE...High pressure over the waters will maintain northerly winds through Monday. The next very strong ebb will occur around 730 AM Sunday, so a Small Craft Advisory has been issued for the the Columbia River Bar between 5-10 AM Sunday as the ebb builds seas to around 8 ft along the Main Channel of the Bar. A thermal trough develops along the southern Oregon coast Sunday afternoon through early Monday morning, tightening pressure gradients across the waters south of Cape Falcon. This will lead to breezier northerly winds with gusts up to 25 kt. A Small Craft Advisory remains in effect for all waters south of Cape Falcon from 2 PM Sunday through at least 5 AM Monday. Northerly winds may last longer for the outer waters beyond 10 NM offshore, so the Small Craft Advisory for these zones will go through 8 AM Monday. Seas fall to 5-6 ft tonight, re-building to 8-9 ft at 11 sec as wind waves increase from the breezy northerly winds. The next robust weather system returns Tuesday into Wednesday. This system will bring a return of breezy southerly winds across all waters. Current guidance suggests high confidence (90%+ chance) for widespread and frequent small craft wind gusts of 21 kt or greater, and a 35-55% chance for widespread and frequent Gale force wind gusts of 34 kt or greater on Tuesday. Chances for isolated Gale force wind gusts are around 75-90%, with the highest chances beyond 20 NM offshore. Latest guidance suggests the strongest winds occur between 8 AM to 5 PM Tuesday. Seas on Tuesday and Wednesday are also expected to build to around 13-16 ft in response to increasing wind waves along with an increasing westerly swell. There`s a 30-60% chance seas could exceed 15 ft with a 5-15% chance for seas exceeding 20 ft. Chances increase from south to north, peaking across the waters north of Cape Falcon and mainly beyond 40 NM offshore. -10/03 && .PQR WATCHES/WARNINGS/ADVISORIES... OR...None. WA...None. PZ...Small Craft Advisory from 5 AM to 10 AM PDT this morning for PZZ210. Small Craft Advisory from 2 PM this afternoon to 5 AM PDT Monday for PZZ252-253. Small Craft Advisory from 2 PM this afternoon to 8 AM PDT Monday for PZZ272-273. && $$ www.weather.gov/portland Interact with us via social media: www.facebook.com/NWSPortland x.com/NWSPortland

865 FXUS66 KMFR 221003 AFDMFR Area Forecast Discussion National Weather Service Medford OR 303 AM PDT Sun Mar 22 2026 .DISCUSSION (Today through Saturday)... Key Points: * Only minor impacts expected the next several days - Limited frost/freeze potential this morning for westside areas - Breezy winds on Tuesday coupled with low RH for eastside - Rainfall Tuesday for areas along and west of Cascades Further Details: At this time, eastside areas are likely to see temperatures below freezing which is not uncommon for this time of year. Northern Klamath and Lake counties may be in the upper teens to lower 20s for lows. Westside areas where sensitive vegetation exists may need attention as temperatures could be down around 32-34 this morning. That said, this window is only about 2 hours around sunrise for these cold temperatures. The pattern aloft turns mostly zonal into early parts of next week. A slightly stronger trough than the one yesterday enters the region Tuesday into Wednesday. Rainfall from this system may be welcomed as many areas remain dry. In typical fashion, amounts along and near the coast will be highest, and will range from roughly 0.25"-0.50". Some isolated areas could see 0.75" when its all said and done Wednesday morning (~24 hour totals). Farther inland, amounts decrease significantly with amounts generally from a couple hundreths to around a quarter of an inch, but Douglas county may see higher amounts closer to half an inch across the higher terrain. Cascades are forecast to receive around 0.25"-0.50" north of Lake of the Woods. Not expecting much--if any --snowfall from this system as snow levels will be around 7,000-8,000 ft initially and only dropping to around 5,000-6,000 ft by the time QPF starts dropping off. Not expecting much precipitation for eastside areas. Also not expecting thunderstorms as MUCAPE values are either very low or nonexistent. Tuesday in particular will see breezy wind speeds for eastside areas as a strong surface low heads towards Vancouver/British Columbia. This will be coupled with low RH values in the 20 percent range with precipitation likely not amounting to much on the eastside. Given the lack precipitation we could see at least an elevated fire weather conditions Tuesday for eastside areas. To some extent, we could see these elevated conditions continue through Wednesday but at this time wind speeds may not be as high as Tuesday. Overall, the next several days will be noted by dry conditions and low RH values (30% or less), especially eastside and northern California where minimum RH will be the lowest across the forecast area. Next change for precipitation doesn`t look great until the end of the month/early April. -Guerrero && .AVIATION (06Z TAFs)... There is some stratus in a few of the coastal valleys this evening and that should persist overnight. Otherwise, VFR conditions will prevail through the TAF period as a thermal trough remains set up along the Oregon coast. -Smith && .MARINE...Updated 300 AM PDT Sunday, March 22, 2026...A thermal trough continues to strengthen today, bringing gusty north winds. A Hazardous Seas Warning is in effect for the waters from Cape Blanco southward with small craft advisory conditions north of Cape Blanco through early Monday morning. Winds may briefly rise to gales this afternoon and early evening for areas south of Gold Beach. Conditions briefly improve Monday afternoon and evening. Advisory strength southerly winds are likely on Tuesday as a cold front swings through the waters. Gales are also possible for northern waters on Tuesday. && .MFR WATCHES/WARNINGS/ADVISORIES... OR...CA...None. PACIFIC COASTAL WATERS...Small Craft Advisory until 5 AM PDT Monday for PZZ350-356-370. Hazardous Seas Warning until 5 AM PDT Monday for PZZ356-376. && $$

929 FXUS66 KEKA 220859 AFDEKA AREA FORECAST DISCUSSION National Weather Service Eureka CA 159 AM PDT Sun Mar 22 2026 .SYNOPSIS...Dry weather and above average inland temperatures will persist into next week. A weakening front will bring a quick chance for rainfall and a period of increased southerly winds. Otherwise, dry and warm weather will persist. && .DISCUSSION...Latest satellite imagery depicts high-level clouds streaming across the area within the westerly flow aloft, while low clouds and patchy fog have developed around Humboldt Bay and along the Eel river valley. Breezy to locally gusty northerly winds are observed over the coastal ridges and interior higher terrain overnight. Quiet weather conditions are observed across the region as a surface high pressure strengthens and a zonal flow aloft prevail through Monday. This will continue to promote dry weather and above normal (10-20F) temperatures across the area. High temperatures are forecast to be up to around 5 degrees warmer compared with Saturday`s reading. Breezy west to northwest winds is expected again this afternoon through the channeled terrain, while gusty north- northwest winds will continue over the coastal ridges. The high pressure will crawl eastward and rising Monday through Wednesday, while an upper-level trough approaches the Pacific NW. Models continue to suggest an associated cold front clipping the northern portion of the area Tuesday- Wednesday. Global ensembles models and WPC cluster guidances have been adjusting amounts and coverage to areas farther north with a lesser amounts over Del Norte and Humboldt counties. However, NMB probability continue to suggest an increase chance (60-80% chance) of wetting rain (>0.10 in) Tuesday into Wednesday to the northern portion of the CWA, with the highest chances for Del Norte County and farther northern portion of Humboldt. There remain the potential (25-50% chances) for some light rain of sprinkles for Southern Humboldt, Trinity and far northern Mendocino. Meanwhile, mostly dry weather remain for southern Mendocino and Lake counties. Stay tunes for updates! Ridging springs back around mid next week after our brief spat of rain Tue or Wed. Generally dry conditions with above normal interior high temps are expected. Overnight low temps may cool down mid or late next week for perhaps low end frost freeze concerns. /ZVS && .AVIATION...Gusty north winds are keeping cloud decks away from terminals along the North Coast tonight. VFR conditions are expected through the night with high confidence (>80%). Winds will ease slightly tonight, before northerlies build again up to 20-25kts gusts by 3/22 morning. Once these winds along the coast die, models begin to show fog forming around Humboldt Bay and into the Eel River Delta. The models seem confident in the timing (03Z, +/- 1hr) yet, the ceiling is fluctuating leading the forecast to remain optimistic. Inland areas are expected to remain VFR through the TAF period with afternoon gusts mixing down to terminals beginning around 21Z (+/- 2hrs). && .MARINE...Very hazardous ocean conditions are forecast this weekend. Gale force north wind gusts are highly probable (>80% chance) primarily over the outer waters and inner waters south of Cape Mendocino. A gale warning is in effect through Sunday midday. A long fetch of strong northerly winds will generate very steep waves from 10 to 15 feet with periods from 8 to 10 seconds through the evening. Waves this large and steep will be capable of capsizing vessels and mariners are encouraged to remain in port. A hazardous seas warning has been issued for northern inner waters as very steep waves will build to 10 ft or more Sat evening and Sat night. These very steep waves will continue through Sunday afternoon and evening for the inner waters. The outer waters will remain very steep and treacherous through at least early Monday morning. Outlook going into next week: Conditions will begin to calm and subside on Monday with lower seas into Tue. Conditions deteriorate again around mid week as a large mid period W-NW swell arrives and potential for northerly gales increases after frontal passage from this coming Thursday (3/26) through Saturday (3/28). && .FIRE WEATHER... .EKA WATCHES/WARNINGS/ADVISORIES... CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Hazardous Seas Warning until noon PDT Sunday for PZZ450. Gale Warning until 3 PM PDT Sunday for PZZ455. Gale Warning until 9 PM PDT Sunday 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

547 FXUS66 KMTR 221021 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 321 AM PDT Sun Mar 22 2026 ...New SHORT TERM, LONG TERM... .KEY MESSAGES... Updated at 1257 PM PDT Sat Mar 21 2026 - Temperatures remain above seasonal average this week - Dry weather through the 7 day outlook && .SHORT TERM... Issued at 223 AM PDT Sun Mar 22 2026 (Today and tonight) The skies are still mostly clear early this morning, although a marine layer has returned to the coast and we could get a sunrise surprise of low stratus later this morning. GFS LAMP guidance shoes a 40-60% chance of low ceilings forming at MRY between 6-9 AM before clearing out in the late morning. Probabilities are similar at the other coastal locations, but the temperate still has to drop another 5 degrees or so for the air in the boundary layer to become saturated. Any low clouds will clear by the afternoon as high cloud coverage starts to increase. Temperatures are currently 5-10 degrees cooler than this time yesterday, but max temps in the afternoon will only end up a couple degrees cooler than yesterday. That`s still roughly 15 degrees above normal. While the seasonally extreme heat wave is over, 850 mb temperatures are still above the 90th percentile for this time of year and unseasonably warm weather continues. && .LONG TERM... Issued at 223 AM PDT Sun Mar 22 2026 (Monday through Saturday) The overall pattern is dominated by zonal flow, with the Bay Area situated between the subtropical jet to the south and polar front jet to the north. This will keep the weather pretty benign. Temperatures will continue to run above normal, but noticeably cooler than last week. Ensemble clusters agree that broad, low- amplitude ridging is likely this weekend, but an embedded short wave trough will likely counteract some of those effects. The next chance for rain is around the middle of next week, and while it`s still long-range, the probability has been increasing. && .AVIATION... (06Z TAFS) Issued at 923 PM PDT Sat Mar 21 2026 Currently VFR at all terminals with the exception of HAF which is reporting MVFR visibility. Moderate confidence on the return of LIFR ceilings to HAF, MRY, and SNS. Onshore winds will prevail. Haze will reduce slant range visibilities. Vicinity of SFO...Currently VFR with gusty westerly flow. High confidence in VFR through the TAF period. Westerly winds will prevail, diminishing tonight before increasing again (although not as strong) with the afternoon sea breeze tomorrow. SFO Bridge Approach...Similar to SFO. Monterey Bay Terminals...Currently VFR with southwesterly flow at MRY and VFR with northerly flow at SNS. Moderate confidence on LIFR ceilings returning to the terminals tonight. Onshore winds will prevail. && .MARINE... (Tonight through next Friday) Issued at 923 PM PDT Sat Mar 21 2026 Strong northerly winds will continue through the weekend with gale force gusts beginning to diminish tomorrow morning. Hazardous seas are expected over the weekend as a result. Winds diminish and seas abate going into next week. && .MTR WATCHES/WARNINGS/ADVISORIES... CA...None. PZ...Gale Warning until 3 AM PDT early this morning for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 0-10 nm. Small Craft Advisory until 3 AM PDT Monday for Pigeon Pt to Pt Pinos 0-10 nm-Pt Pinos to Pt Piedras Blancas 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm. Gale Warning until 3 PM PDT this afternoon for Pt Arena to Pt Reyes 10-60 NM. && $$ SHORT TERM...Flynn LONG TERM....Flynn AVIATION...Sarment MARINE...Sarment 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

590 FXUS66 KOTX 221122 AFDOTX Area Forecast Discussion National Weather Service Spokane WA 422 AM PDT Sun Mar 22 2026 .KEY MESSAGES... - Hydrology: St Joe and Coeur d`Alene Rivers near bankfull with additional small rises into Sunday. Stehekin River is falling but levels still high - Next system: Unsettled weather returns Tuesday and Wednesday, bringing valley rain, mountain rain and snow, and breezy to windy conditions && .SYNOPSIS... Dry weather will continue through Monday with colder night temperatures. Unsettled weather is forecast to return Tuesday and Wednesday as the next low pressure system brings valley rain, mountain rain and snow, and breezy to windy conditions. A return to warm, dry conditions expected by weeks end. && .DISCUSSION... Today and Monday: The Inland Northwest will be on the periphery of the four corners high over Southwest US. It is bringing dry, warm conditions through Monday. High level stratus will pass through the region. A weakening gradient behind yesterdays system will lead to weaker winds. Highs will be in the 50s and low 60s. With clear skies, radiational cooling will be optimal overnight. Lows will dip into upper 20s and 30s for Sunday night. An incoming system will bring increasing clouds Monday night and keep lows in the 30s to low 40s. Tuesday and Wednesday: A low is currently off of California around -140 degree longitude. It will push a warm front into the Pacific Northwest on Tuesday followed by a quick cold front on Wednesday. Moisture associated with the system is expected to be around 200-250% of normal. NBM probabilities of precip amounts are around 50-80% for half an inch for the Idaho Panhandle. Extreme Eastern Washington is around 20-40% probability. The Cascade Crest has a 50% probability for one inch. The lowlands along the Cascades will struggle to reach a quarter of an inch. Rising snow levels will limit the snow amounts for mountain passes. Stevens could receive 3-6 inches through Wednesday. The 10-90% probability for Stevens Pass is 1-10 inches. Sherman and Lookout will struggle to get an inch. Winds will also be breezy with the passing system. Current NBM has gusts 20-30 mph. Some ensemble members have gusts reaching near 40 mph on Wednesday. Thursday through Sunday: The high pressure will build back into the region behind the exiting system. Precip chances will be near zero after Thursday morning. Highs will begin to climb into the upper 50s and 60s. Overnight lows will be in the upper 20s and 30s. /JDC && .AVIATION... 12Z TAFS: VFR conditions will continue for all TAF sites through Sunday. Main threat for scattered low clouds will be along the Cascade Crest and within the Clearwater and St Joe River Valleys mainly through 16z. Steady southwest winds will gust to 15kts at times in the afternoon 19-01z at GEG-SFF. FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: High confidence in VFR conditions for all TAF sites through 12z Monday. /sb ----------------------- 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 52 32 58 41 50 38 / 0 0 0 10 90 70 Coeur d`Alene 50 32 57 40 50 39 / 0 0 0 10 90 90 Pullman 50 34 56 43 52 40 / 0 0 0 10 90 80 Lewiston 55 37 60 45 56 45 / 0 0 0 10 80 80 Colville 55 31 58 38 50 35 / 0 0 0 10 100 70 Sandpoint 50 32 53 37 45 39 / 0 0 0 20 100 90 Kellogg 49 34 56 41 50 40 / 0 0 0 20 90 100 Moses Lake 59 32 60 43 56 39 / 0 0 0 10 70 30 Wenatchee 57 35 57 43 53 37 / 0 0 0 10 90 30 Omak 56 34 58 42 53 38 / 0 0 0 10 90 40 && .OTX WATCHES/WARNINGS/ADVISORIES... WA...None. ID...None. && $$

424 FXUS66 KPDT 221114 AFDPDT Area Forecast Discussion National Weather Service Pendleton OR 414 AM PDT Sun Mar 22 2026 .KEY MESSAGES... 1. Dry and cool conditions through early in the week 2. At or near seasonal average temperatures 3. A pattern change will bring back chances of lowland rain, mountain snow and breezy conditions && .DISCUSSION... Current satellite shows mostly clear skies over the region with some mid-level clouds moving into central OR. Models show west flow aloft ushering in the dry air mass over the region. With the lack of cloud cover and the cold air mass coming in, temperatures could drop to freezing across portions of central OR and the foothills of the Blues as well as the Simcoe Highlands and adjacent valleys. Models are in firm agreement this pattern will persist through Monday. The westerly flow aloft has brought in dry and cooler air last night and overnight. Dry and cool conditions will bring temperatures back to near seasonal normal with NBM raw ensembles showing highs to be in the low to mid 50s across much of the region with low 60s in central OR and isolated spots in the Basin (60-70% confidence). By Sunday temperatures will slowly increase, however, still remaining near seasonal averages with temperatures across much of the region seeing the low 60s (60-80% confidence) through midweek. Models are in firm agreement that by Tuesday/Tuesday night an upper level low will track to the north of the region bringing a frontal system across the region. Increased chances of precipitation will occur with NBM raw ensembles showing 0.50-1 inch of precipitable water along the Cascades. With the snow levels above 4000 feet Tuesday, much of the precipitation will fall as rain. The lowlands will see 0.02-0.05 inches of rain Tuesday with 60-70% of the NBM raw ensembles in agreement. As we move into Wednesday and early Thursday and the front passes the region, gridded models show the snow levels to drop to below 2000 feet and models show a continued plume of moisture pushing into the region. This will bring snow accumulations of 2.5-5 inches along the I-90 corridor Wednesday with 70-80% confidence. The Blues will see only 0.01-0.05 inches above 4000 feet (60% confidence) and the lower elevations will remain dry. Not only will this front bring precipitation, it will also bring breezy conditions back to the area. NBM raw ensembles show 60-80% probabilities of the region seeing gusty winds of 25-30 mph both Tuesday and Wednesday as the front passes over. && .AVIATION /12Z TAFS THROUGH 12Z MONDAY/... VFR conditions persist through the forecast period. Winds will remain light and variable under 10kts. && .HYDROLOGY... River flooding from snowmelt and previous rainfall is ongoing for the Yakima and Naches rivers in south-central Washington. These rivers have crested, or will crest this afternoon, for most locations in the Yakima and Kittitas valleys. Locations downstream towards the eastern end of the Yakima Valley and the lower Columbia Basin have yet to crest, and the Yakima at Kiona is forecast to crest between late Sunday afternoon and early Monday morning. Looking ahead, several forecast points along the Yakima and Naches rivers, including those at Easton, Cliffdell, Naches, and perhaps Umtanum, are then anticipated to remain above action stage through the week according to the latest forecasts from the Northwest River Forecast Center in Portland. && .Preliminary Point Temps/PoPs... PDT 57 34 60 44 / 0 0 0 10 ALW 57 37 60 47 / 0 0 0 10 PSC 60 35 63 45 / 0 0 0 10 YKM 56 34 60 42 / 0 0 0 10 HRI 60 34 63 45 / 0 0 0 10 ELN 53 31 55 38 / 0 0 0 10 RDM 60 31 64 42 / 0 0 0 10 LGD 58 35 64 45 / 0 0 0 10 GCD 61 37 65 45 / 0 0 0 10 DLS 61 38 62 45 / 0 0 0 10 && .PDT WATCHES/WARNINGS/ADVISORIES... WA...None. OR...None. && $$ DISCUSSION...90 AVIATION...90 HYDROLOGY...86

122 FXUS65 KREV 220904 AFDREV Area Forecast Discussion National Weather Service Reno NV 204 AM PDT Sun Mar 22 2026 .KEY MESSAGES... * Warmer than normal temperatures prevail throughout the week with more daily records possible. * Gusty afternoon winds and renewed impacts to recreation and travel return Monday through Wednesday. * Dry conditions prevail through next weekend with wetter weather possible around first of April, but confidence is low. && .DISCUSSION... Without a drastic change in our governing weather pattern, temperatures will continue to trend well above normal this week amid persistent western ridging. A brief warming trend begins after today and lasts through midweek, presenting more opportunities to set new daily records during the first half of the week and perhaps again next weekend. An eastward shift in high pressure will allow stronger W/SW flow to overspread the region early this week, encouraging increased breezes each afternoon Monday through Wednesday. Similar high probabilities (60% chance or better) of 30+ mph gusts will exist across NE California and far NW Nevada each these afternoons with strongest winds slightly favored on Tuesday and Wednesday. Expect renewed impacts to lake recreation and air/ground travel early next week. Temperatures cool on Thursday in the wake of a cold frontal passage, but will still only come within 5-15F of seasonal averages. And that seems to be as close as we`ll get to seasonable temperatures this week as we slowly warm into next weekend. Still no sign of rain or snow until the final couple of days of March when ensembles depict a shift to western troughing. Blended guidance corroborates this as precip chances increase around March 30-31. Confidence is very low, however, as guidance has had a recent tendency to delay this pattern change, so we`ll have to wait and see how models handle this signal. -Salas && .AVIATION... Widespread VFR conditions prevail today with light east winds in the morning becoming breezy SW/W winds (10-15 kts) in the afternoon. The potential for wind impacts should increase in the afternoons Monday through Wednesday as a W/SW belt of 20-40 kt FL100 winds supports increased surface breezes. -Salas && .CLIMATE... * Monthly record set at Reno: - Reno, NV: New record of 88F. The old monthly record was 86F on 3/18/2026 * Monthly record set at South Lake Tahoe: - South Lake Tahoe, CA: New record of 76F. The old monthly record was 71F on 3/30/2015 New daily record high temperatures and the previous daily record high temperatures for Reno and South Lake Tahoe: Date Reno NV South Lake Tahoe CA ---- ------------ ------------------- 3/17 82F (old 78F in 2007) 69F (old 65F in 2007) 3/18 86F (old 77F in 1947) 76F (old 63F in 2004) 3/19 85F (old 77F in 1997) 72F (old 65F in 2015) 3/20 88F (old 81F in 2004) 72F (old 68F in 1997) 3/21 81F (old 80F in 2004) 70F (old 68F in 1997) 3/22 77F - 2004 65F - 2004 3/23 77F - 202266F - 2022 3/24 80F - 202265F - 2022 3/25 81F - 202267F - 2022 ------------------------------------------------------- New daily record warmest low temperatures and the previous daily record warmest low temperatures for Reno and South Lake Tahoe: Date Reno NV South Lake Tahoe CA ---- ------------ ------------------- 3/18 48F - 1904 37F - 2021 3/19 46F - 2013 38F - 2013 3/20 47F - 2013 35F - 2013 3/21 50F (old 46F in 2015) 38F - 1972 3/22 50F - 201240F - 2012 3/23 46F - 200040F - 1998 3/24 45F - 200640F - 1986 3/25 52F - 189338F - 2008 ------------------------------------------------------- && .REV Watches/Warnings/Advisories... NV...None. CA...None. && $$

776 FXUS66 KSTO 211946 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 1246 PM PDT Sat Mar 21 2026 .KEY MESSAGES... - Slight decrease in temperatures this weekend but temperatures continue to be 10 to 20 degrees above normal. Daily record highs will be possibly again through mid week. - Breezy winds Sunday western side of Sacramento Valley and again next Thursday otherwise dry and hot weather continues. && .DISCUSSION... ...Next 7 days... Dry and unseasonably warm high temperatures will continue across the area for the next 7 days, as upper level high pressure continues to amplify and remain relatively stationary with slight movements to the east. This subtle shift will allow high temperatures to cool slightly for the next several days, however afternoon high temperatures are still going to run around 10 to 20 degrees warmer than normal for the beginning of Spring. Tomorrow as the ridge continues to wobble eastward, northerly winds will strengthen with some gusts along and west of the I-5 corridor around 20-30 mph. Later next week, ridging continues to be the dominant synoptic weather feature, however the ridge will be located south of the Four Corners Region, allowing another period of northerly winds to develop across the Valley. Forecast wind gusts of 20 to 30 mph along the I-5 corridor, as well as gusts of 15-25 mph through the rest of the region and will allow daytime humidity values to fall into the mid to upper teens in the northern Sacramento Valley. Some relief may be on the horizon, as ensembles are showing an eventual breakdown of the ridge with a potential PacNW trough forming by the end of March/early April. Too early to think about what that means for temperatures or any needed precipitation, but something to keep an eye on as we move through the rest of March. If you are outside or planning outdoor activities this weekend into next week, please remember to drink plenty of water and wear sunscreen. As this is an anomalous heat event, individuals may not be fully acclimated to the emerging heat. Local waterways are also running very cold due to snowmelt. && .AVIATION... VFR conditions next 24 hours at Valley TAF sites. Surface winds below 12 kts at all sites except in the northern Sacramento Valley where northerly wind gusts of up 25 kts begin around 15z Sunday. Slight chance (~10%) of BR/MVFR conditions in northern San Joaquin Valley between 12z and 16z Sunday. && .STO WATCHES/WARNINGS/ADVISORIES... None. && $$

104 FXUS65 KMSO 220825 AFDMSO Area Forecast Discussion National Weather Service Missoula MT 225 AM MDT Sun Mar 22 2026 .DISCUSSION... KEY MESSAGES: - Above average temperatures much of this upcoming week. - Next system arrives Tuesday into Wednesday with high elevation snow and gusty winds. The Northern Rockies will be under a mild and dry westerly flow pattern Sunday into Monday. The combination of low humidities and breezy conditions will bring elevated fire weather risks along the divide in southwest Montana and across Lemhi County, ID. Model guidance continues to advertise the next Pacific system arriving Tuesday, with widespread precipitation focusing across northwest Montana and north-central Idaho. Snow levels will rise from 4,000-4,500 feet Tuesday morning to 6,000-6,500 feet Tuesday afternoon with deepening southwesterly flow. Snow levels will come crashing down Wednesday morning, with the latest guidance suggesting higher confidence for a strong cold front arriving. Pressure rises along this front will focus the highest wind gust potential across northwest Montana, where peak valley wind gusts will range from 35-45 mph, with gusts of 50-65 mph across mountain ridgetops and crests. Valley areas along the US Highway 2 corridor west of Kalispell to Libby are being monitored for higher gusts, given statistic guidance showing a 30-40% chance for gusts of 50 mph or greater. Shower activity will continue under west-northwest flow into Thursday, before the next ridge of high pressure begins to amplify across the region Friday into the weekend. Model ensembles are in strong agreement (90% of members) for this ridge to bring a stark warming trend, with valleys seeing highs reach into the 60s and 70s by next Saturday. && .AVIATION...GOES water vapor imagery this morning highlights a dry airmass moving into the Northern Rockies airspace, with cloud cover gradually decreasing. Given clearing skies, patchy valley fog will form through 22/1300Z, along and near bodies of water. Deep mixing this afternoon will promote wind gusts of 15-20kts across western Montana terminals. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...Flood Watch until noon MDT today for Flathead/Mission Valleys... Kootenai/Cabinet Region...Lower Clark Fork Region. ID...None. && $$

358 FXUS65 KBOI 221128 AFDBOI Area Forecast Discussion National Weather Service Boise ID 528 AM MDT Sun Mar 22 2026 .UPDATE...Updated aviation discussion. && .KEY MESSAGES... - Warm, slightly above normal temperatures and dry conditions will continue through the middle of next week. - Another cold front will move through the region midweek, bringing mountain showers and slightly cooler temperatures. && .SHORT TERM /Through Tuesday Night/... Issued 315 AM MDT SUN MAR 22 2026 Lighter winds and cooler temperatures are expected today, especially compared to the record shattering temperatures last week. Valley highs will reach the low 60s, still 3-5 degrees above normal for this time of year. Dry and partly cloudy skies will continue as a ridge of high pressure builds back in over the region through Monday. Temperatures will climb to 10-15 degrees above normal on Monday and Tuesday, peaking on Tuesday ahead of another week frontal passage. Late Tuesday, an atmospheric river will move into the Pacific Northwest. This will increase chances of showers (30-50%) and cool temperatures slightly across high elevations in southeast Oregon and in the West Central ID Mountains. Models remain consistent in the northward progression of the bulk of the moisture, so confidence is low in any meaningful shift to the weather in area valleys during the short term period. && .LONG TERM /Wednesday through Sunday/... Issued 315 AM MDT SUN MAR 22 2026 The Gulf of Alaska upper-level trough will continue to cause precipitation chances and gusty winds until late Wednesday/early Thursday. An embedded upper-level shortwave will move a cold front through the area Wednesday afternoon into evening, with precipitation chances (30-50%) limited to higher elevations in our northern zones. Snow levels start around 8000 ft MSL when precipitation begins, before lowering to near 3000 ft MSL by precipitation ending. Beginning Thursday, the upper-level ridge looks to rebuild over the Western CONUS and bring temperatures above normal again (with temps 5-10 degrees above average by Saturday). By Sunday, one cluster solution and some deterministic model runs hint at an upper-level trough moving onshore into the Pacific NW, bringing precipitation and cooler temperatures. && .AVIATION /12Z Sunday through Monday/... Issued 528 AM MDT SUN MAR 22 2026 VFR conditions with scattered high cloud coverage. Surface winds: variable less than 10 kts, except W-NW 10-15 kt with gusts 20-25 kt from KMUO to KTWF/KJER. Winds aloft at 10K feet: W-NW 5-20 kt. KBOI...VFR. Surface winds: W-NW 10 kt or less. && .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.....CH SHORT TERM...SA LONG TERM....CH

836 FXUS65 KLKN 220701 AAA AFDLKN Area Forecast Discussion...Updated National Weather Service Elko NV 1201 AM PDT Sun Mar 22 2026 .KEY MESSAGES... * Record to near record warmth is expected across all of Northern and Central Nevada each afternoon through the next several days * Dry weather will persist through next weekend && .UPDATE... Issued at 1201 AM PDT Sun Mar 22 2026 The current forecast is on track. No updates are needed. && .DISCUSSION... (Today through Saturday) WEATHER PATTERN OVERVIEW: Anomalously strong early Spring upper level ridge of high pressure will remain the dominant player for weather through the forecast period. This ridge currently situated over the Sonora Desert of Arizona and northern Mexico will keep temperatures 25 to 30 degrees above average this week. This will continue the streak of seeing near record to record high temperatures across northern and eastern Nevada through at least the next several days. There will due to a few disturbances in the westerly flow that will help cool things of for a day or two during this period. However, even during those days temperatures will still be near record territory. The first of these cooler days will be today as an upper trough flattens the ridge a bit allowing for increased upper level clouds to move across northern NV in the westerly flow. Temperatures this afternoon will be five to nine degrees cooler than yesterday afternoon ranging in the upper 60s to upper 70s. Monday through Wednesday, the ridge restrengthens, sending temperatures back into the upper 70s to mid 80s. Thursday and Friday will see another weak upper trough transit southern Nevada around the periphery of the ridge. This will again help push the ridge slightly east over the Rio Grande Valley of far southern New Mexico, as well as flatten the ridge briefly allowing for height falls across northern and central NV and increasing the upper level clouds. Temperatures will be about 5 to 10 degrees cooler, ranging into into the upper 60s to upper 70s both days. However, again the ridge will be quick to rebuild NW, allowing for a quick recovery of temperatures back into the mid 70s to mid 80s for next weekend. The good news is even with the very warm day time temperatures, overnight lows will average into the mid 30s to mid 40s, While anomalously warm themselves, it still allows for good recovery from heat stresses accumulated during the day. For winds during the Thursday through Saturday period, there will be a shift Thursday and Friday to a northwest direction, and again Saturday to be out of the NE. Speeds will be similar at 5 to 15 mph, with gusts up to 25 mph. FORECAST CONFIDENCE & DEVIATIONS: There is high confidence for near record, to record setting temperatures for at least the next several days. There is high confidence in the continuation of dry conditions through next weekend. && .AVIATION... VFR conditions are forecast through the next 24 hours, with breezy southwest to west winds of 10KT to 20KT with gusts up to 30KT possible. Increasing mid to upper level clouds will lower CIGs to a minimum of 15kFT. && .LKN Watches/Warnings/Advisories... None. && $$ DISCUSSION...98 AVIATION...98