390
FXUS65 KBOI 292344
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
544 PM MDT Tue Sep 29 2026

.UPDATE...Updated aviation discussion.

&&

.KEY MESSAGES...
- Breezy afternoon winds across the western Snake Plain
  Wednesday.

- Dry with above normal temperatures warming through this
  weekend.

&&

.SHORT TERM /Through Thursday Night/...
Issued 229 PM MDT TUE SEP 29 2026
Dry westerly flow will remain in place through Thursday. With
little change in the pattern temperatures will hold fairly
steady. The cool nights and warm afternoons keep the wide
diurnal temperature spreads (30-45 degrees) in place. Wednesday
will bring another round of breezy afternoon winds, mostly
across the Snake Plain. High temperatures will hold around 5
degrees above normal, or upper 70s at lower elevations.

&&

.LONG TERM /Friday through Tuesday/...
Issued 229 PM MDT TUE SEP 29 2026
Warming picks up over the weekend in response to a building
ridge. Temperatures will push to around 10 degrees above
normal, putting lower elevations into the low-mid 80s starting
Friday. Models continue to show a minor upper low track across
southern OR/ID on Monday. The precipitation threat remains
minimal with development likely limited to higher terrain Monday
afternoon. Temperatures remain well above normal heading into
next week as a dry weather pattern continues.

&&

.AVIATION /00Z Wednesday through Thursday/...
Issued 533 PM MDT TUE SEP 29 2026
VFR with SCT-BKN mid-high clouds over mountains of east-central
OR and central ID, clear elsewhere. Patchy MVFR-IFR fog near KBKE
and KMYL Wednesday morning. Surface winds:
W to NW 5-15 kt this evening with gusts around 20-25 kt east of
KBOI through around midnight tonight. Winds aloft at 10kft MSL:
NW 10-20 kt.

KBOI...VFR with clear skies. Surface winds: NW 7-12 kt with
gusts up to 20 kt, lowering down to 5-10 kt after 02Z, then
variable less than 7 kt overnight.

&&

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

OR...None.

&&

$$

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AVIATION.....JY
SHORT TERM...DG
LONG TERM....DG