East Fork Trail, Idaho Weather Forecast Discussion

809
FXUS65 KBOI 192038
AFDBOI
Area Forecast Discussion
National Weather Service Boise ID
238 PM MDT Fri Sep 19 2025
.SHORT TERM...Tonight through Sunday night...A low pressure
system remains over central CA today with high clouds moving
from the Great Basin northward into southeast OR and southwest
ID. Some cumulus buildups present over southern Owyhee County
this afternoon will be the focus of isolated thunderstorms this
afternoon and evening. High clouds on Saturday decrease,
allowing for more daytime heating and instability with a
slightly higher chance for storms. Storms will generally develop
south of the Snake Plain over the higher terrain on Saturday
afternoon. A trough from the Gulf of Alaska will bring a cold
front to the area on Sunday, which will interact with the
moisture already in place. Scattered showers and isolated
thunderstorms form early Sunday morning ahead of the front, and
intensify with the daytime heating on Sunday afternoon as the
front moves east. The front will bring breezy west-northwest
winds during the afternoon Sunday.
.LONG TERM...Monday through Friday...After Sunday`s cold front
and trough, Monday will be a few degrees below normal and a
little breezy. However, high pressure quickly builds in
overhead, supporting a warming trend through Thursday. Winds
remain typical, but temps warm up to 10 degrees above normal by
Thursday. Models diverge on the track of a closed upper low over
California, so the forecast for Friday becomes a little
uncertain. The average solution has the closed low clipping the
area, with a 10-20% chance of precipitation a slight cool down
and mild breezes.
&&
.AVIATION...VFR and scattered clouds. Isolated showers and
storms along and south of the NV border this afternoon not
expected to impact terminals. Surface winds: variable up to 10
kt. Winds aloft at 10kft MSL: S-E 5-10 kt.
KBOI...VFR with high clouds. Surface winds NW 5-10 kt with some
variability, becoming SE after sunset.
Weekend Outlook...VFR with increasing chances for showers
beginning Saturday afternoon, mainly south of the Snake River
Plain. By Sunday afternoon showers and storms will be possible
over the mountains of central Idaho and northeast Oregon. MVFR
will be possible in the strongest storms along with gusty
frontal winds. Surface winds SW 5- 10 kt on Saturday increasing
to NW 10-20 kt on Sunday.
&&
.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...KA
LONG TERM....JM
AVIATION.....JM

NWS BOI Office Area Forecast Discussion