Star, Idaho 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

347
FXUS65 KBOI 191603
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
1003 AM MDT Sat Jul 19 2025

.DISCUSSION...Current water vapor and visible satellite imagery
shows a "cold" front draped across our area. This front is
weakening and expected to stall out over our southern zones
brining nothing more than some increased cloud cover, have
updated the sky forecast to reflect current obs. Temperature
today will be right around normal (leaning a couple degrees
below normal), with lower elevations temperatures making it to
around the low to mid-90s. Northwest winds will become breezy
this afternoon, with gusts as high as 20-25 MPH across most of
our area (up to 30 MPH in the usual spots east of Mountain Home
and west of Twin Falls). Sunday continues to look dry with near
zonal (a little northwesterly component) flow aloft.
Temperatures on Sunday look to be similar to that of today. CAMs
are honing in on more precipitation associated with an upper
trough and leading cold front on Monday afternoon. Decent
moisture looks like it is going to be in place with PWs around
the 70th percentile. In light of this guidance, and in
collaboration with neighboring offices, have opted in increase
the chances of precipitation on Monday afternoon. Otherwise no
other updates were necessary.



&&

.AVIATION...VFR. Areas of smoke aloft. Surface winds: W-NW 5-15 kt.
Gusts to 25 kt 18Z to sunset. Winds aloft at 10kft MSL: West 15 kt.

KBOI...VFR. Surface winds: variable less than 7 kt becoming NW
8-12 kt with gusts to 20 kt after 18Z to sunset.

Sunday Outlook...VFR. Areas of smoke aloft. Surface winds: W-NW
5-15 kt.


&&

.PREV DISCUSSION...
SHORT TERM...Today through Monday night...A west-southwest flow
aloft will bring dry conditions across the region through the
weekend, although clouds will increase across the north and
become mostly cloudy on Sunday ahead of an approaching upper
trough in southwestern Canada. The trough enters the Pacific
Northwest on Monday for a 15-30 percent chance of showers and a
slight chance (less than 20 percent) of thunderstorms in
southeast Oregon and far SW Idaho (north and west of Boise)
Monday afternoon and evening. Precipitation totals are favored
to be light per latest model runs, with most locations
receiving less than a tenth (0.10) of an inch. Temperatures
through the weekend remain near to slightly below normal,
cooling to several degrees below normal on Monday due to the
passage of a cold front Sunday night. Winds will be breezy at
times each afternoon, especially in southern areas Monday
afternoon.

LONG TERM...Tuesday through Saturday...Models and ensembles
remain in decent agreement through the period, depicting an
upper trough off the west coast and a dry southwest flow aloft
across our area. Some of the members hint at convection later
in the week, but the average probability within the blend of
models is less than 15 percent. Temperatures slightly below
normal on Tuesday warm to near normal on Wednesday with little
day-to-day change through Saturday.

&&

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

&&

$$

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DISCUSSION...NF
AVIATION.....LC
SHORT TERM...BW
LONG TERM....BW