FXUS65 KBOI 221735 AFDBOI Area Forecast Discussion National Weather Service Boise ID 1135 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 /18Z Sunday through Monday/... Issued 1135 AM MDT SUN MAR 22 2026 VFR with SCT-BKN high cirrus clouds will prevail across southwestern Idaho and southeastern Oregon through Monday. Surface winds will generally be westerly at less than 10 kts across the area this afternoon, becoming light and variable tonight and on Monday. Winds aloft at 10 Kft: West 10 to 15 kts. KBOI...VFR with light northwesterly surface winds less than 10 kts today, becoming southeasterly at 3 to 6 kts tonight. && .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.....JB SHORT TERM...SA LONG TERM....CH