textproduct: Boise

UPDATE

Updated aviation discussion.

KEY MESSAGES

- Clear, warmer, and drier through the forecast. - Breezy conditions tomorrow through Saturday.

SHORT TERM /Through Saturday Night/

Issued 232 PM MDT THU JUN 11 2026 Pacific high pressure builds as a Great Lakes trough remains in place. These two synoptic features keep us in a tight pressure gradient as high pressure builds in. This means windy afternoons, especially Friday and Saturday, and a steadily warming and drying trend with clear skies. Friday will be 5 degrees warmer than today, and Saturday is forecast to be about the same as Friday. A short wave embedded in the flow brings increased winds Friday lingering into Saturday. Wind gusts of 25-35 mph can be expected in open areas, highlands, and ridgetops remaining elevated overnight into Saturday where they come down to 20-30 mph. Winds weaken heading into the long term as the warming and drying continues.

LONG TERM /Sunday through Thursday/

Issued 232 PM MDT THU JUN 11 2026 Heat will continue to build across the region as an upper ridge moves in from the coast early next week. The area remains dry during this time as northwest flow aloft keeps monsoon moisture locked up over the Four Corners area. High temperatures will reach 10-15 degrees above normal by Tuesday, staying in that range through Thursday. Lower elevations will see highs in the low-mid 90s starting on Monday. Tuesday is forecast to be the hottest day, with Wednesday only a degree or two lower. For typically hotter sites in the Snake Plain the probability of 100 or greater is 10% or less Tue/Wed, while the chance of reaching 95 has bumped up to 50-80%. Models continue to show a trough approaching the Pac NW late next week.

AVIATION /06Z Friday through Saturday/

Issued 1118 PM MDT THU JUN 11 2026 VFR and mostly clear. Surface winds: variable up to 10 kt through Friday morning, then NW 10-20 kt with gusts to 20-35 kt by Friday mid-afternoon through night. Winds aloft at 10kft MSL: west to northwest 10-20 kt.

KBOI...VFR and clear. Surface winds: variable or SE 3-6 kt overnight. Returning NW around Fri/16Z, increasing to 8-15 kt with gusts to 20-25 kt in the afternoon.

Weekend Outlook...VFR and mostly clear, except a few afternoon mountain cumulus. Surface winds: NW-NE 10-20 kt with PM gusts to 20- 30 kt Saturday, then W-NW 5-15 kt with PM gusts around 20 kt Sunday.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.