207
FXUS65 KBOI 052353
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
553 PM MDT Fri Jun 5 2026

.UPDATE...Updated aviation discussion.

&&

.KEY MESSAGES...
- Cold frontal passage will bring gusty winds Saturday and
  Sunday.

- High temperatures Sunday will be 10 degrees below normal with
  rain and snow showers possible in the west-central Idaho
  mountains.

- Showers Tuesday and Wednesday will bring additional
  precipitation, mainly to the mountains.

&&

.SHORT TERM /Through Sunday Night/...
Issued 300 PM MDT FRI JUN 5 2026
A shortwave trough entering the Pac NW will push a pair of cold
fronts through the region this weekend. The first front will
push across SE Oregon this evening, and SW Idaho overnight.
This will bring gusty winds to 35 mph at the typically windy
sites along the I-84 corridor between Baker City and Twin Falls.
The frontal passage will be dry and result in temperatures 10-15
degrees cooler than today. Breezy conditions will continue
during the day Saturday, as the main upper trough moves into the
interior NW. A second cold front will accompany the trough
passage Saturday night into Sunday, bringing another round of
gusty winds, stronger than tonight. Gusts to 35 mph are expected
in the Snake Plain east of Mountain Home on Sunday. The upper
trough will support showers over the mountains of Baker County
and the w-central Idaho mountains. Snow levels will briefly
drop to between 4500-5500 feet Sunday morning. Light
accumulation, less than an inch, is possible above 7000 feet
through early morning. Showers will taper off Sunday afternoon
as the trough exits east. Sunday is the coolest day with high
temperatures around 70 in the lower elevations and mid-50s in
the mountains (about 10 degrees below normal).

&&

.LONG TERM /Monday through Friday/...
Issued 300 PM MDT FRI JUN 5 2026
Cool and unsettled through Thursday with temperatures around
10-15 degrees below normal. Another trough will move into the
Pacific NW on Monday afternoon. This system will bring unsettled
conditions to the area with showers and afternoon thunderstorms
through Wednesday. Generally 0.10-0.25 inch of precipitation
across the valleys, with 0.75 to 1.25 inch precipitation over
the mountains. A ridge will build over the West Coast on Friday
into the weekend with a gradual warming trend next weekend.

&&

.AVIATION /00Z Saturday through Sunday/...
Issued 550 PM MDT FRI JUN 5 2026
VFR and increasing clouds tonight. Surface winds: NW 10-20kt
this evening. Winds aloft at 10kft MSL: SW 15-25kt.

KBOI...VFR. NW 5-10kt, 18 kt gusts weaken overnight.

Weekend Outlook...VFR. Surface winds light overnight and NW
10-20kt with gusts up to 25 kt Sat afternoon. W-NW 5-15kt Sun
afternoon with gusts in Idaho up to 30 kt.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...Fire Weather Watch from Sunday afternoon through Sunday
     evening for IDZ424-426.
OR...None.

&&

$$

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AVIATION.....JM
SHORT TERM...DG
LONG TERM....KA