Area Forecast Discussion
Issued by NWS Boise, ID
Issued by NWS Boise, ID
528 FXUS65 KBOI 270333 AFDBOI Area Forecast Discussion National Weather Service Boise ID 833 PM MST Mon Jan 26 2026 .DISCUSSION...The long wave upper ridge continues over western North America, but as noted in the previous discussion a Pacific cold front will be able to break through with light snow showers early Wednesday. Snow may mix with rain in the Treasure Valley but other areas will stay snow with at most an inch accumulation. Long range models forecast the main upper ridge to continue through at least Feb 5, with only minor smaller scale troughs passing through, about Friday and Sunday night. No updates. && .AVIATION...VFR with broken mid to high level clouds. Surface winds: variable at less than 10 kt. Winds aloft at 10kft MSL: W 10-20 kt. KBOI...VFR. Surface winds: light and variable at less than 5 kt. && .PREV DISCUSSION... SHORT TERM...Tonight through Wednesday night...High clouds will continue to filter in throughout the area today, bringing overcast skies for much of the region. Temperatures will remain near to slightly below normal, with dry conditions prevailing through Tuesday night as a ridge of high pressure continues to build over the region. A quick hitting cold front will move through the region early on Wednesday morning bringing breezy westerly winds and brief snow showers. Current forecasts show the Treasure Valley with a 5-15% chance of precipitation between 5-10am MST on Wednesday, but forecast confidence is low thanks to persistent dry air at the surface. If precipitation falls, it is likely to be snow in the valleys thanks to the overnight cold temperatures paired with colder air lingering from the inversion. Any accumulations of snow look to be less than one inch, even on higher elevations. The front and associated precipitation will move out by late afternoon on Wednesday as stagnant conditions return thanks to a rebuilding ridge of high pressure. LONG TERM...Thursday through Monday...An upper level ridge will dominate much of the West through the extended period. While the main storm track will remain north of our forecast area, a few minor short wave troughs passing over the top of the ridge will temporarily dent the upper level ridge. One of the waves will pass through the area on Friday bringing a 30 to 50 percent chance of precipitation to the area. The next wave is expected on Sunday and Monday bringing a 20 to 30 percent chance of precipitation to the area. Temperatures should see a gradual warming trend reaching 5 to 10 degrees above normal temperatures late in the forecast period. We will also be on the lookout for stagnant conditions possibly returning during the extended forecast period. && .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...LC AVIATION.....JM SHORT TERM...SA/LC LONG TERM....JB