textproduct: Boise

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.