521
FXUS65 KBOI 170939
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
339 AM MDT Tue Jun 17 2025

.SHORT TERM...Today through Thursday night...Weak ridging will
develop today as Monday`s trough continues east. Temperatures
will be slightly cooler today in the wake of the trough, but
still above normal. The ridge will strengthen and amplify over
the Intermountain West Wednesday and Thursday, positioning the
forecast area under warm southwest flow aloft. Temperatures both
Wednesday and Thursday will range 5 to 10 degrees above normal.
Meanwhile, a notable Gulf of Alaska low will track south along
the Pacific Northwest Coast on Thursday, helping to further
amplify the ridge while nudging it toward the east.

.LONG TERM...Friday through Tuesday...As the aforementioned low
finally moves onshore Friday, windy conditions will emerge over
east Oregon and southwest Idaho. The trough and associated cold
front should arrive by mid-day Friday, cooling the max
temperatures by approximately 5 to 10 degrees from Thursday.
Shower and thunderstorm chances will trend upward (20-40%) for
northeast OR and west-central ID with the cold front. Cooler
air will become re-inforced on Saturday as the low center moves
overhead. Gusty winds will continue, with max temperatures
dropping by an additional 10 to 20 degrees area-wide. Shower
chances are forecast to increase to 50-75% for northern areas
and 20-45% for southern areas. Snow levels may dip as low as
5500-7500 feet MSL over the weekend and allow the potential for
light snow to fall on high terrain. Currently, the most
favorable area for light snow will be the mountains of w-central
Idaho Saturday into Sunday.

The main low center will begin to weaken as it moves
northeastward Sunday, but troughing will persist over the
Northwest U.S. Lighter winds are anticipated Sunday, while max
temps rebound by a couple of degrees for the afternoon. With
this pattern lingering into early next week, mid level
instability may keep shower activity around. The temperature
forecast becomes less certain Tuesday as models diverge with
depicting the trough evolution.

&&

.AVIATION...VFR and mostly clear. Surface winds: SW-NW 5-15 kt,
gusts to 15-20 kt this afternoon. Winds aloft at 10kft MSL: W
10-20 kt.

KBOI...VFR and mostly clear. Light and variable winds will
become NW 5-10 kt around 17/17z. Afternoon gusts 15-20 kt.

&&

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

&&

$$

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SHORT TERM...SH
LONG TERM....SH
AVIATION.....SH