596
FXUS65 KBOI 081034 AAA
AFDBOI

Area Forecast Discussion...UPDATED
National Weather Service Boise ID
334 AM MST Sat Nov 8 2025

.SHORT TERM...Today through Monday night...An upper ridge will
amplify over the western US through the weekend. This will
result in dry weather under mostly clear skies across our
region. Warming aloft will transfer to mountain sites which add
3 to 5 degrees to high temperatures each day. Lower elevations
will lag, with little change in temperatures from yesterday to
today, then several degrees of warming into Sunday. Monday will
see the ridge get flattened as an upper trough tracks through
the ID panhandle. Models have retreated further north with
precipitation accompanying this system so rain/snow chances
don`t exceed 10 percent. Monday is the warmest day with highs
around 10 degrees above normal except across lowest elevations
where the inversion will hold highs near normal. This can be
seen in Monday`s forecast high of 55 degrees for both Ontario
and McCall.

.LONG TERM...Tuesday through Saturday...The development of a
deep upper trough off the West coast will rebuild a ridge over
the region Tue/Wed. This will be dirtier ridge, bringing more
extensive high cloud cover than what we see this weekend. There
remains good agreement in the 00Z models to bring the trough
onto the coast late in the week kicking off a period of more
active weather heading into mid-November. Precipitation chances
increase from west-east on Thursday with the entire region
covered in 30%+ probabilities Thursday night through Saturday.
Snow levels will start out above 8kft MSL on Thursday, dropping
to 5-6kft by Saturday as the first trough passes. Temperatures
hold around 10 degrees above normal (lowest elevations excluded)
through Thursday, with the flip to a trough cooling
temperatures to around normal starting Friday.

&&

.AVIATION...VFR. Patchy fog in mountain valleys through 16Z
could result in MVFR/IFR visibilities. Surface winds: Variable
under 10 kt. Winds aloft at 10kft MSL: W-NW 5-15 kt.

KBOI...VFR with winds less than 10kt.

Sunday Outlook...VFR under mostly clear skies. Surface winds:
E-SE up to 12 kt. Winds aloft at 10kft MSL: Variable 5-15 kt.

&&

.AIR STAGNATION...High pressure aloft will bring a period of
more stagnant conditions to the region next week. A temperature
inversion will lower mixing heights to between 2-3kft AGL
Sunday, possibly dropping below 2kft AGL Monday and continuing
through Wed/Thur. Light winds will accompany lower mixing
heights. The dry air mass and lack of snow cover and will limit
fog development.

&&

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

&&

$$

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SHORT TERM.......DG
LONG TERM........DG
AVIATION.........DG
AIR STAGNATION...DG