838
FXUS65 KBOI 302126
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
226 PM MST Sun Nov 30 2025

.SHORT TERM...Tonight through Tuesday night...Northwest flow
continues this afternoon with low clouds and fog over the Blue
Mountains in OR and along the NV border south of Rome OR to
Gooding ID, with clearing across the rest of the area. Low
clouds and fog are forecast to persist over the Magic Valley
tonight with west-northwest flow. Forecast confidence is low
tonight on fog development in the Treasure Valley and around
Baker County. Breezy northwest winds this afternoon 10-20 mph
tapering off after sunset. Good radiational cooling tonight
with patchy fog and temperatures in the 10s and 20s. Dry
conditions on Monday with areas of low clouds and fog possible.
Next weak system arrives on Tuesday with scattered light
showers in the afternoon and snow levels around 3000-4000`.
Minimal precipitation expected with this system, with snow
accumulations around in inch in the mountains.

.LONG TERM...Wednesday through Sunday...The long term period
will start of dry, thanks to high pressure over the Pacific
and the departing trough puts our area under dry northerly flow
aloft. This flow aloft will also help keep lower elevation
temperatures near normal, higher elevations will be leaning
above normal. Going into late weekend, it continues to appear
likely that a pattern shift will get underway. As has been the
case, uncertainty remains on when this pattern change will take
place. The GFS ensemble suite continues to favor an earlier
onset (as early as Thursday night), whereas the Euro ensemble
suite favors a later onset. The ridge weakening would allow for
multiple shortwaves to pass across our area while tapping into
some Pacific moisture. This will allow for mild temps with snow
levels around 4-6kft MSL. Precipitation chances will begin to
increase early Friday, making it to 15-30% in lower elevations
and 30-70% in higher elevations (chances increasing with
elevation) Friday afternoon. By Saturday, these chances increase
to 30-50% in lower elevations and 50-85% in higher elevations.

&&

.AVIATION...Generally VFR, MVFR/LIFR conditions in fog/low
stratus persisting in the western Magic Valley and near the
Nevada border. Conditions improving to VFR area-wide by around
Mon/00z. Low confidence in fog development Monday morning.
Surface winds: NW 5-15 kt with gusts to 20-25 kt in the Snake
Plain, becoming variable up to 10 kt overnight. Winds aloft at
10kft MSL: NW-NE 10-20 kt.

KBOI...VFR. Surface winds: NW 10-15 kts with gusts to 20kt this
afternoon, becoming light and variable overnight.

&&

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

&&

$$

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SHORT TERM...KA
LONG TERM....NF
AVIATION.....NF