277
FXUS65 KBOI 071750
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
1150 AM MDT Sun Jun 7 2026

.UPDATE...Updated aviation discussion.

&&

.KEY MESSAGES...
- High temperatures about 10 degrees below normal today with
  rain and snow showers possible in the west-central Idaho
  mountains.

- Widespread showers late Monday night through Tuesday morning,
  thunderstorms Tuesday afternoon, then more showers Wednesday
  mainly on northern mountains.

- Warming and drying Thursday through Saturday.

&&

.SHORT TERM /Through Tuesday Night/...
Issued 319 AM MDT SUN JUN 7 2026
At 2 AM MDT a reinforcing cold front could be seen on satellite
extending from NW Montana through Grangeville ID, southwestward
through Steens Mountain, to Lakeview OR, supported by a short wave
trough from the main upper low in northern WA. The cold front will
move eastward through our CWA today bringing further cooling and
maintaining gusty west/northwest winds through the day.  Monday
looks mostly sunny and warmer after the upper trough exits east,
and ahead of the next north Pacific cold front forecast to
arrive Monday night. That system will bring rain to all areas
late Monday night through Tuesday morning, heaviest in northern
areas where .25 to .75 inch is expected, including up to an inch
of snow above 6000 feet MSL. But .10 to .20 inch of rain should
also fall on the Snake Basin. Tuesday`s system will exit east
later in the day, and Tuesday night should be drier.

&&

.LONG TERM /Wednesday through Sunday/...
Issued 319 AM MDT SUN JUN 7 2026
One last surface cold front and supporting upper trough Wednesday,
with showers from that system mainly in the north. A warming
and drying trend is forecast Thursday through Saturday with
further upper troughs staying north of our CWA, but close enough
for occasional cloudiness in northern areas vs mostly clear
skies in the south. A stronger upper trough may bring cooling
and gusty winds to Idaho on Sunday but not all models agree on
that.

&&

.AVIATION /18Z Sunday through Monday/...
Issued 1146 AM MDT SUN JUN 7 2026
VFR with increasing high clouds late and overnight. Chance of
showers entering eastern Oregon by mid day Monday. Surface winds
WNW 10-25 kt with higher gusts, strongest over south central
Idaho. Winds aloft at 10kft: west 25-35 kt.

KBOI...VFR with increasing high clouds late this evening and
overnight. Surface winds NW 10-20 kt with gusts to 25 kt,
becoming SE around 10 kt after 03Z.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...Fire Weather Watch until 9 PM MDT this evening for IDZ424-426.
OR...None.

&&

$$

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AVIATION.....MC
SHORT TERM...LC
LONG TERM....LC