605
FXUS65 KBOI 030903
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
303 AM MDT Wed Jun 3 2026

.KEY MESSAGES...
- Isolated to scattered showers and thunderstorms this afternoon
  and evening across east-central Oregon and west-central Idaho,
  with lower potential to the south.

- Hot, dry, and windy this afternoon and evening with critical
  fire weather conditions in the Owyhee Mountains and Magic
  Valley.

- Gusty winds along a cold front tonight. Continued breezy into
  the weekend, strongest on Saturday.

- Temperatures fluctuate late this week into the weekend between
  10 degrees above normal and slightly below normal.

&&

.SHORT TERM /Through Friday Night/...
A shortwave trough and cold front will move across the area
this afternoon and evening. The center of the trough will move
across northern areas, resulting in scattered showers and
isolated thunderstorms across east-central Oregon and west-
central Idaho, with a lower potential (10-20% chance) across
the Treasure Valley and points south. Moisture will be limited,
with gusty outflow winds to 40 mph and lightning the primary
hazards from any thunderstorms. Blowing dust is also possible
from outflow gusts.

High temperatures today will be around 10 degrees above normal
across southwest Idaho, but near normal across portions of
southeast Oregon where the cold front will arrive sooner. Winds
ahead of the front will become breezy with gusts 20-35 mph, and
combined with low humidity across southwest Idaho will result in
critical fire weather conditions in and around the Magic Valley
and Owyhee Mountains. The front will move across southeast
Oregon this afternoon and southwest Idaho this evening with
gusts to around 40 mph and blowing dust possible along the
front. Winds will stay gusty overnight especially along the I-84
corridor in southeast Oregon and in the Snake Plain of
southwest Idaho. On Thursday, winds will subside in most areas
except east of Boise through the Magic Valley where gusts 20-35
mph will continue. Temperatures will cool to near normal behind
the front. On Friday, southwest flow associated with an upper
trough approaching the Pacific Northwest and an amplifying ridge
to our east will boost temperatures by around 10 degrees with
breezy conditions developing, especially over the higher
terrain.

&&

.LONG TERM /Saturday through Wednesday/...
An upper level trough will move into the Pacific Northwest to
our north over the weekend. This will push a mostly dry cold
front through our area, bringing gusty winds and cooler
temperatures. Highs over the weekend will be up to 5 degrees
below normal. The strongest winds are favored to arrive late
Saturday with gusts 30-45 mph. A 10-20% chance of showers and
thunderstorms will develop across the northern mountains with
lower chances to the south. Another upper level trough is
expected to move into the Pacific Northwest early next week.
Differences between the ensembles in timing and strength
decrease forecast confidence. Overall, model blends favor a
slight warmup ahead of the trough early next week, but cooler
temperatures become more likely by midweek as the trough moves
inland. Shower and thunderstorm chances increase to 15-40% by
Tuesday and Wednesday, with the highest chances across the
northern mountains.

&&

.AVIATION /06Z Wednesday through Thursday/...
Issued 1037 PM MDT TUE JUN 2 2026
Mainly VFR. Isolated showers and thunderstorms develop across
eastern Oregon late Wed morning, spreading towards west-central
Idaho Wed afternoon. Timing for possible terminal impacts is
after 21Z at KBKE/KBNO, and after 23Z at KONO/KMYL. Areas of
blowing dust possible with outflow winds. Surface winds:
Variable less than 10 kt overnight. Becoming SW 5-15 kt with
gusts to 25 kt, and gusty outflow winds 25-40 kt possible Wed
afternoon. Winds aloft at 10kft MSL: W 10-25 kt.

KBOI...Mainly VFR. 30% chance of MVFR after 22Z as outflow winds
from nearby showers/thunderstorms may produce blowing dust late
Wed afternoon. Surface winds: SE 5-10 kt Wed morning. SW 15 kt
with some gusts to 25 kt by Wed afternoon. Gusty outflow winds
with gusts to 35 kt possible after 03/23Z.

&&

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

OR...None.

&&

$$

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SHORT TERM...ST
LONG TERM....ST
AVIATION.....JR