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Forecast Discussion for Boise, ID
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| 125 FXUS65 KBOI 310250 AFDBOI Area Forecast Discussion National Weather Service Boise ID 850 PM MDT Thu Oct 30 2025 .DISCUSSION...A high cloud shield associated with a weak upper ridge will work east of the area overnight. We`ll see some brief clearing in the early morning hours which could lead to patchy fog formation in mtn valleys. Looking at low temperatures similar to Thursday morning if not a few degrees warmer thanks to the clouds. Friday starts off clear for most sites, but clouds will be quick to increase as further ridging builds in from the coast. Current forecast is on track for this evening so no updates. && .AVIATION...VFR with some lingering high clouds this evening. Patchy fog possible overnight, mainly over mtn valleys. Surface winds: variable 7 kt or less. Winds aloft at 10kft MSL: W-NW 10-20 kt. KBOI...VFR. Surface winds: variable under 5 kt this evening and overnight. && .PREV DISCUSSION... SHORT TERM...Tonight through Saturday night...A ridge will remain over the area and bring light winds and dry conditions through Friday. Mild temperatures are expected during the day with chilly temperatures at night. High clouds will stream into the area from the west with mostly cloudy skies at times. Temperatures warm from normal to around 10 degrees above normal on Friday. On Saturday the flow aloft turns zonal with increased cloudiness and a chance of showers mainly north of a line from Baker City OR to McCall ID. LONG TERM...Sunday through Thursday...A ridge of high pressure will shift east as a trough of low pressure moves into the Pacific Northwest on Sunday. Precipitation will primarily fall over Baker County and the West Central Mountains, with snow levels staying elevated to around 8500-9500 feet. Minimal accumulations are anticipated across the region. Warm southwest flow will then continue to bring temperatures 5-15 degrees above normal next Monday and Tuesday, with another push of a weak shortwave on Tuesday. This looks to bring a better chance of rain to high terrain across the region, with snow levels staying around 8000-9000 feet MSL. Valleys will still primarily be shadowed from precipitation. A deep upper level low off the coast of British Columbia will then advect southerly moisture and a deep trough into the Pacific Northwest on Wednesday into Thursday, with widespread precipitation and cooling on Thursday across the region. Snow levels are forecast to fall 6500-7500 feet MSL by Thursday, but significant uncertainty remains in the extent of that cold air. && .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 DISCUSSION...DG AVIATION.....JY SHORT TERM...KA LONG TERM....SA | 
 Previous Forecast Discussions may be found at
NWS Boise, ID (BOI) Office Forecast Discussions.
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