570
FXUS65 KBOI 022156
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
256 PM MST Tue Dec 2 2025

.SHORT TERM...Tonight through Thursday night...A cold front and
upper level trough continues to move southeast today, with
lingering rain and snow showers over the area. Showers will
taper off after sunset. The system will bring areas of low
clouds and fog to the area tonight and on Wednesday as upper
level ridging builds in behind the cold front. The ridge will
remain over the area through Thursday before the next system
arrives from the northwest. Snow is expected over the west
central ID mountains and Blue Mountains Thursday afternoon and
evening. Snow accumulations of 2-4 inches expected Thursday
evening.

.LONG TERM...Friday through Tuesday...An active pattern is
forecasted for this weekend. An upper-level ridge will further
build into the Eastern Pacific, with moisture and upper-level
shortwave disturbances moving through the area through the long
term. PoPs will be active for much of the long term with these
disturbances. Snow levels will rise from around 4000-6000 feet
Friday morning (starting as snow in mountain valleys) to around
5500-7000 feet Friday night, and possibly as high as 8000 feet
as the warm front passes through late in the day. Saturday and
beyond, snow levels will fluctuate slightly with passing
systems, but should average around 5000-7000 feet. Precipitation
will let up on Monday as the upper-level ridge axis builds
closer to the region, however precipitation looks to return
Tuesday with another upper-level shortwave passage. Temperatures
Friday through Tuesday should average around 10 degrees above
normal, and passing systems will bring breezy conditions.

&&

.AVIATION...Isolated showers moving N to S have been decreasing
through afternoon, will continue into evening. MVFR to LIFR in snow,
with MVFR to VFR in rain. Snow levels 3500-5000 ft MSL this
afternoon, decreasing to 1500-3000 ft MSL this evening.
Areas of mtn obscuration. Patchy fog and low stratus developing late
tonight. Surface winds: W-NW 5-15 kt. Gusts 20-30 kt KMUO to
KJER/KTWF and in SE Oregon. Winds aloft at 10kft MSL: N 20-35 kt,
becoming N-NE 15-30 kt after Wed/00Z.

KBOI...Mainly VFR. A 50% chance of IFR/LIFR low stratus/fog
developing at the terminal late tonight/Wed morning. Surface winds:
NW 5-12 kt this afternoon with gusts to 20 kt possible.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...None.
OR...None.

&&

$$

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SHORT TERM...KA
LONG TERM....CH
AVIATION.....CH