322
FXUS65 KBOI 022000
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
200 PM MDT Tue Sep 2 2025

.SHORT TERM...Tonight through Thursday night...Slight day-to-day
cooling through Thursday but still hot. Limited monsoon moisture
moving northward will bring a 10-15 percent chance of showers
and high-based late-day thunderstorms to southeast Oregon and
southern Owyhee Co/ID through Thursday. Thunderstorms will have
gusty outflow winds to 40 mph but minimal rain on the ground
until deeper moisture arrives in the long term. Patchy near-
surface wildfire smoke will continue in the northern half of the
CWA, especially in eastern Valley County/ID. Relatively clear
in the southern half.

.LONG TERM...Friday through Tuesday...An upper ridge is forecast
to remain over the northern Rockies Friday while a shortwave
trough approaches the OR and northern CA coast. The dynamics of
this trough will interact with the monsoon moisture already in
place and bring a 20-40 percent chance of thunderstorms to
eastern OR and far southwest ID. A piece of the trough swings
inland on Saturday with a chance (30-60%) of showers and
thunderstorms across the entire forecast area. Temperatures
trend down to near normal by Saturday. Showers and thunderstorms
linger Sunday through Tuesday with an upper level low forecast
to remain situated near the WA and OR coast. This will keep
temperatures generally around normal for the first part of next
week.

&&

.AVIATION...VFR. Smoke layers aloft. High density altitude in
the afternoons due to heat. Virga and isolated showers/
thunderstorms in southeast OR and near the NV/ID border until
03/04Z. Thunderstorm outflow gusts 30-40 kt. Surface winds:
variable 5-15 kt. Winds aloft at 10kft MSL: variable less than
10 kt.

KBOI...VFR. Smoke layers aloft. High density altitude in the
afternoons due to heat. Surface winds: NW 5-10 kt until 03.02Z,
then light and variable.

&&

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

&&

$$

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SHORT TERM...LC
LONG TERM....TL
AVIATION.....LC