FXUS65 KBOI 240838 AFDBOI Area Forecast Discussion National Weather Service Boise ID 238 AM MDT Fri Apr 24 2026 .KEY MESSAGES... - Light mountain snow showers and breezy winds today. - Widespread frost and areas of freezing temperatures late tonight into Saturday morning. - Remaining unsettled through the weekend and into early next week. Temperatures will gradually warm toward normal by mid week. && .SHORT TERM /Through Sunday Night/... An upper low will remain over the Northern Plains / Southern Canada through the short term. A weak shortwave trough will dive down the backside of the low today and clip the northern part of our area. This will produce scattered snow showers across the west-central Idaho mountains with dry conditions elsewhere. Despite snow levels on mountain valley floors, any accumulations will be minimal. Highs today will be 5-10 degrees below normal. Winds will be breezy this afternoon across southern Idaho with gusts 20-35 mph. With a cool airmass in place, light winds, and mostly clear skies, temperatures will dip to near or below freezing tonight in agricultural valleys. A Freeze Watch remains in effect for these areas. Additional shortwave energy dropping down the backside of the low will merge with a broad upper level trough over California over the weekend. The resultant broad trough over the Pacific Northwest will keep temperatures cool with a 20-50% chance of showers over the higher terrain along with a 10% chance of thunderstorms each afternoon. Snow levels will be 4000-5500 feet, with minor accumulations possible on higher peaks. Winds will be lighter on Saturday, then breezy again Sunday as surface low pressure moves over eastern Idaho. Areas of frost will develop Saturday and Sunday nights, but lows should not be as cold as tonight. && .LONG TERM /Monday through Friday/... A broad upper level trough will remain over the Pacific Northwest on Monday and Tuesday, followed by upper level ridging Wednesday through Friday. A 20-50% chance of showers, highest chance over the mountains, and a 10% chance of thunderstorms will continue on Monday. Precipitation chances will begin to trend lower Tuesday, then settle at around 20% over the mountains each afternoon late week with lower chances elsewhere. Ridging will bring warmer temperatures, increasing to near or slightly above normal by mid to late week. Winds will be lighter under this pattern. && .AVIATION /06Z Friday through Saturday/... Issued 1150 PM MDT THU APR 23 2026 Generally VFR. Scattered showers mainly over the w-cntrl mtns early Fri/AM, then again Fri/PM. Patchy fog/low stratus early Fri/AM in sheltered mtn valleys. IFR/LIFR conditions in snow showers and fog/low stratus. Snow levels: 2.5-4.5 kft MSL Fri/AM. Then 3.5-6kft MSL Fri/PM, lowest over the w-cntrl mtns. Surface winds: W-N 5-15 kt overnight. Winds aloft at 10kft MSL: W-NW 15-30 kt. KBOI...VFR. Surface winds: NW under 10 kt overnight, then NW 10-15 kt with gusts up to 25 kt Fri/PM. Weekend Outlook...Generally VFR. Unstable conditions will support a chance of IFR snow/mixed showers over the higher terrain Sat/Sun afternoons. Occasional valley rain showers also possible. Slight chance of thunderstorms near NV border Sat/Sun. Snow levels: lowest Friday at 3-4kft MSL, rising to 4-6kft MSL for Sat/Sun. Mtns obscured in showers. Surface winds: NW-N 10-20 kt with 20-30 kt gusts Friday, then W-NW 5-15 kt with 15-25 kt gusts Sat/Sun. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...Freeze Watch from late tonight through Saturday morning for IDZ012-014-016. OR...Freeze Watch from late tonight through Saturday morning for ORZ064. && $$ www.weather.gov/Boise Interact with us via social media: www.facebook.com/NWSBoise www.x.com/NWSBoise SHORT TERM...ST LONG TERM....ST AVIATION.....NF