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Forecast Discussion for Boise, ID
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685 FXUS65 KBOI 160906 AFDBOI Area Forecast Discussion National Weather Service Boise ID 306 AM MDT Mon Mar 16 2026 .KEY MESSAGES... - Warm front will bring a dusting of snow to northern mountains this morning before changing to light rain and ending this afternoon. - Strong warming later today through Wednesday, with widespread record high temperatures and dry conditions continuing through Saturday, then cooling. && .SHORT TERM /Through Wednesday Night/... Warm front and light snow will be in northern areas this morning. Total snowfall one inch or less before changing to rain mid- morning and ending this afternoon. Southern areas. i.e., south of the warm front, will warm rapidly today with highs about 15 degrees warmer than yesterday in Idaho and around 20 degrees warmer in southeast Oregon. Light winds this morning will become westerly before noon, with afternoon gusts to 30 mph in the Snake Basin east of Boise. Similar winds are expected Tuesday afternoon. The warming trend will continue into Tuesday and Wednesday as a very strong upper ridge builds inland across the western US. High temps Tuesday should be 8 to 12 degrees warmer than today and near record highs for the date. Wednesday will be another 5 to 8 degrees warmer and will be among the warmest days ever recorded so early in the year. && .LONG TERM /Thursday through Monday/... An anomalously strong high pressure system is expected to dominate the weather into next weekend. Both ensemble and operational model guidance remains in very strong agreement regarding the ridge, leading to high forecast confidence in much warmer and continued dry conditions. Temperatures are expected to remain 15-25 degrees above normal area-wide Wednesday into Saturday. Lower valley high temperatures will approach daily records, with temperatures in the upper 70s and lower 80s. Sunday and Monday the upper level flow becomes more zonal as an Alaskan low pushes the dominant ridge southward, dropping heights and moving a colder airmass into the area. While the forecast temperature spread is large on Sunday and Monday, the overall consensus shows high confidence in the cooling trend setting in next week. && .AVIATION /06Z Monday through Tuesday/... Issued 1131 PM MDT SUN MAR 15 2026 Isolated light showers across the north, including BKE and MYL, continue overnight with snow levels 4-6 kft MSL and brief MVFR conditions. Showers mostly clear late in the morning, with predominant light rain showers making a brief return in the afternoon. Surface winds less than 10 kt tonight. Winds aloft at 10kft MSL: NW 30-40 kt. KBOI...VFR and overcast. Surface winds generally out of the SE less than 7 kt overnight. && .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 SHORT TERM...LC LONG TERM....JM AVIATION.....JM |
Previous Forecast Discussions may be found at
NWS Boise, ID (BOI) Office Forecast Discussions.
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