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Forecast Discussion for Boise, ID
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536 FXUS65 KBOI 041707 AFDBOI Area Forecast Discussion National Weather Service Boise ID 1107 AM MDT Thu Jun 4 2026 .UPDATE...Updated aviation discussion. && .KEY MESSAGES... - Breezy winds through the end of the week into the weekend, with the strongest winds on Saturday. - Near to below normal temperatures through the middle of next week, except Friday with highs around 10 degrees above normal. - A wetter pattern is likely next week with significant precipitation totals possible. && .SHORT TERM /Through Saturday Night/... Issued 312 AM MDT THU JUN 4 2026 Behind the cold front that moved through yesterday, highs today will be near to slightly above normal with breezy winds. Gusts will be highest east of Boise through the Magic Valley with speeds 20-30 mph and lighter winds elsewhere. Skies will be mostly clear as high pressure starts to build overhead. Temperatures Friday will rise 5-10 degrees from today as the ridge moves east and southwest flow aloft develops ahead of an upper trough moving into the Pacific Northwest. Breezy winds will develop Friday afternoon, strongest over the higher terrain with gusts 25-35 mph. A cold front Friday night and Saturday will cool temperatures by 10-15 degrees with gusty winds expanding into the Snake River Valley. Despite the advancing trough and cold front, precipitation chances will remain less than 10% with increasing high clouds. && .LONG TERM /Sunday through Thursday/... Issued 312 AM MDT THU JUN 4 2026 An upper level trough will move across the Idaho Panhandle and into western Montana during the day Sunday. This will keep most precipitation north of the area, but the northern mountains will see a 10-20% chance of showers and thunderstorms. Winds will be breezy, especially across south-central Idaho, and highs will be 5-10 degrees below normal. Confidence has increased in a wetter and cool pattern next week as a deep upper low moves into the Pacific Northwest. Precipitation chances rise through the day Monday as the low moves onshore, then peak Tuesday and Wednesday at around 30-70% before gradually tapering off Thursday as the low slowly traverses the Pacific Northwest. However, the chance of precipitation combined across Monday through Wednesday is much higher at around 60-90%, with the highest chance in the mountains. A 10-20% chance of thunderstorms will develop, with the highest potential on Monday and Tuesday in the warmer air ahead of the trough. Precipitation totals in the ensembles vary Monday through Wednesday but average around 0.10-0.25" in the lower elevations and 0.25-0.75" in the mountains. Heavier amounts are possible with around a 25% chance of over 1" in the mountains, and thunderstorms could also produce heavy rainfall. Finally, as colder air arrives with the low, high peaks may see light snow, potentially as low as 6000 feet MSL if the center of the low moves directly overhead as depicted by some models. Winds will be breezy through the week with temperatures averaging 5-10 degrees below normal. && .AVIATION /18Z Thursday through Friday/... Issued 1100 AM MDT THU JUN 4 2026 VFR, a few high clouds this evening. Surface winds: W-NW 5-15 kt, with gusts 15-30 kt, increasing east of KBOI. Winds light and variable this evening. Winds aloft at 10kft: W 10-20 kt. KBOI...VFR. Surface winds: NW 8-13 kt, gusts 20 kt in the afternoon. Light SE winds tonight. Weekend Outlook...Mainly VFR. Mostly clear on Friday with increasing high clouds on Saturday. A 10-20% chance of showers and thunderstorms across the northern mountains Sunday. Surface winds: SW-NW 5-15 kt with gusts 15-30 kt Friday, becoming W-NW 10-20 kt with gusts 20-35 kt Saturday and Sunday. && .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.....JM SHORT TERM...ST LONG TERM....ST |
Previous Forecast Discussions may be found at
NWS Boise, ID (BOI) Office Forecast Discussions.
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