429
FXUS65 KBOI 030355
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
855 PM MST Sun Nov 2 2025

.DISCUSSION...The upper level flow aloft will transition to
southwest tonight into Monday morning, bringing warmer
temperatures on Monday afternoon. Mostly sunny skies expected on
Monday, with increasing clouds in the afternoon. Temperatures
warm around 3-5 degrees from Sunday. A warm front will lift
north over the area late Monday night into Tuesday morning,
bringing scattered to numerous showers through Tuesday evening.
The front lifts northward on Wednesday with breezy southwest-
southeast winds and mild temperatures. Then a cold front moves
through the area on Wednesday evening. No updates.

&&

.AVIATION...VFR. Showers with mountain obscuration developing
Mon evening. Surface winds: variable 10kt becoming SW- SE
5-15kt Mon afternoon. Winds aloft at 10kft MSL: SW 25-35kt
increasing to SW 35-45kt Mon evening.

KBOI...VFR. E-SE 5-10kt.

&&

.PREV DISCUSSION...
SHORT TERM...Tonight through Tuesday night...A mice evening
with mostly clear skies and light winds tonight. Colder
temperatures tonight will see lower valleys fall into the low to
mid 30s.

Temperatures will warm back into the 60s in the lower valleys
on Monday as moist southwesterly flow begins to develop of the
region. This will allow for a weak system to move across the
Pacific Northwest late Monday night into Tuesday, bringing
another round of precipitation. The highest chance (60 to 80
percent) will be across Baker County and the mountains of
central Idaho. Precipitable water (PW) vales briefly approach
the 75th percentile Tuesday morning, favorable for mountain
rainfall amounts between 0.20 and 0.50 inches, with locally up
to 1 inch. Rainfall totals are expected to be less than 0.10
inch across the lower elevations, especially from Boise east
through the Western Magic Valley. Snow levels remain high,
ranging from 7000 to 7500 feet MSL across the north to 8500 to
9000 feet MSL near the Nevada border, resulting in mostly rain
across the mountains.

Precipitation will diminish Tuesday night as the warm front
pushes northward, bringing stronger southwesterly winds and
drier air aloft. This will lead to milder temperatures
overnight, with lows in the upper 40s across the lower valley.

LONG TERM...Wednesday through Sunday...An upper-level trough off
in the Gulf of Alaska will be the predominant weather maker in the
period. Embedded upper-level shortwave troughs and Pacific moisture
will move through the area in waves (the main two waves being
Wednesday late afternoon and overnight Thursday into Friday),
providing precipitation chances through the work week. Wednesday
afternoon will see the first cold front of the period, with PoPs
increasing to 60-90% for higher elevations and 20-50% for lower
elevations Strong mid-level winds accompanying the trough will be
responsible for valley shadowing effects, limiting precip in many
valley locations while favoring upslope terrain such as the Central
Idaho/Boise Mountains. Snow levels will begin around 7500-8500 feet
MSL and lower to 6000-7000 feet MSL. Wind gusts will be strong in SE
OR and Owyhee county Wednesday following the front, with gusts up to
40 mph at times. Overnight Thursday into Friday, the second cold
front will move through, bringing similar PoPs and snow levels to
the previous. Wind gusts will be high in similar locations again,
however not as high (30 mph max). Total QPF and snow amounts have
been fluctuating with this system, with trends from models
decreasing over the past few simulations. Temperatures will decrease
to more seasonable values after Wednesday.

Drier conditions will develop Saturday as a brief, high amplitude
ridge follows, though temperatures will be slow to rebound until
Sunday once southwest flow develops aloft again.

&&

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

&&

$$

www.weather.gov/Boise

Interact with us via social media:
www.facebook.com/NWSBoise
www.x.com/NWSBoise

DISCUSSION...KA
AVIATION.....KA
SHORT TERM...JDS
LONG TERM....CH