Drewsey, Oregon Weather Forecast Discussion

325
FXUS65 KBOI 242006
AFDBOI
Area Forecast Discussion
National Weather Service Boise ID
206 PM MDT Wed Sep 24 2025
.SHORT TERM...Tonight through Friday night...Persistence through
Thursday under high pressure aloft. Upper low in Calif will make
a brief turn northward tonight then southward again Thursday
with no effect on our wx. Changes begin Thursday night when a
Gulf of Alaska upper trough moves onto the northwest coast and
pushes a dry surface cold front through our CWA early Friday
morning. Increased mixing at low levels will slightly moderate
(i.e., raise) low temps in the normally colder valleys Friday
morning. Post-frontal west winds will bring cooler air Friday
with high temps 8 to 10 degrees lower than Thursday. The upper
trough and cooler air mass will already be on their way out by
Saturday morning.
.LONG TERM...Saturday through Wednesday...The closed upper low
in southern CA/NV is expected to stall behind a broad ridge
over the upper Great Basin and southern ID/OR through Saturday.
This ridging will continue slightly warmer than normal
temperatures for the area on Saturday and Sunday, with valleys
seeing peak temperatures in the lower 80s for both days.
Through Sunday, this upper low is expected to trek NE`ward as
a longwave trough and steer some remnant monsoon moisture into
the area, bringing a 10-15% chance of showers Sunday afternoon/
evening and a cooling trend throughout next week. Monday
through Wednesday will see a strong and large upper low off the
Gulf of Alaska steer into the Pacific NW region, bringing rounds
of showers and thunderstorms throughout the area early next
week until Wednesday. As of now, guidances indicate the higher
chances of thunderstorms on Monday and Tuesday, mainly for
higher elevations.
&&
.AVIATION...VFR with clear skies. Surface winds: E-SE 5-15 kt.
Winds aloft at 10kft MSL: S-SE 5-10 kt.
KBOI...VFR with clear skies. Surface winds: SW up to 10 kt this
afternoon and early evening.
&&
.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
SHORT TERM...LC
LONG TERM....JY
AVIATION.....JY

NWS BOI Office Area Forecast Discussion