211
FXUS65 KBOI 250955 CCA
AFDBOI

Area Forecast Discussion...CORRECTED
National Weather Service Boise ID
255 AM MST Tue Nov 25 2025

.SHORT TERM...Today through Thursday night...Monday`s cold front
has left our CWA 8 to 15 degrees colder than early yesterday
morning, but the core of cold air will shift east of our CWA
this afternoon. High temps today will be several degrees colder
than yesterday in our eastern-most areas, but near yesterday`s
highs in Oregon. A Pacific warm front will spread light snow
across the northern third of our CWA late today through
Wednesday. The southern 2/3 of our CWA will become cloudy but
should stay dry. Pcpn in the north will decrease gradually from
south to north later Wednesday through Thursday, but snow will
also mix with or change to rain up to 5500 feet MSL. Pcpn will
increase again Thursday night as the system`s cold front moves
through, with snow level lowering again to about 4800 feet,
changing rain back to snow. Initial snow levels (tonight through
Wednesday) have also been lowered 300-600 feet from previous
forecast, as NBM has become a high- outlier. This means slightly
greater expected snow accumulation through Wednesday, with McCall
now forecast to receive about 2.0 inches vs 1.5 inches previously.
Winds will be generally light southeast through Thursday, then
becoming light northwest behind Thursday night`s cold front.

.LONG TERM...Friday through Tuesday...A shortwave trough digging
over the Northwest region will steer a cold front across the area
Friday. This cold front will bring a gradual cooling trend Friday
through the weekend, gradually dropping lower elevation
temperatures from the upper 40s/lower 50s Friday into the upper
30s/lower 40s Saturday and Sunday, with higher elevations seeing
a drop from the upper 30s into the upper 20s. Snow levels are
expected to gradually drop from the 3000-4000 ft range Friday
and into the 2000-3000 ft range Saturday through Sunday. Friday
will see a 30-40% chance of mixed precipitation over higher
elevations. Saturday will see a 20-30% chance of rain over lower
elevations and a 30-40% chance of snow over mountains. Sunday
will see a weaker shortwave trough dig across the region, but
with uncertainty over its digging pattern and moisture content.
For now, a 20-30% chance of snow over the mountains is forecast
for the early hours of Sunday. Monday through early Tuesday
will see broad ridging that will bring drier conditions and a
weak warming trend into the lower 40s. Long-term guidances
suggest another trough from W`rn British Columbia digging into
the area late Tuesday, tentatively returning a cooling trend and
widespread precipitation over the area.

&&

.AVIATION...VFR. Patchy fog overnight, mainly in sheltered
higher valleys. Increasing clouds with snow showers developing
over the mountains Tuesday afternoon, and mountains becoming
obscured. Surface winds: variable under 10 kt for most areas
and SW 10-15 kt in lower Magic Valley, becoming E-SE 5-10kt
Tuesday afternoon. Winds aloft at 10kft MSL: W-NW 20-30kt
increasing to W-NW 30-40kt by 00z/Wednesday.

KBOI...VFR and mostly clear with few high clouds. Surface winds:
SE 5-10kt overnight.

&&

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

&&

$$

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SHORT TERM...LC
LONG TERM....JY
AVIATION.....JY