textproduct: Boise

KEY MESSAGES

- Gusty winds and very dry conditions through Wednesday.

- Above normal temperatures remain in place into next the week. - A chance of showers and thunderstorms returns to the area Friday and Saturday.

SHORT TERM /Through Thursday Night/

We remain in dry northwest flow through Thursday. Today's heat will be pushed to the south tonight as a minor waves knocks back the upper ridge. Winds will come down from this afternoon's gusts, but remain breezy overnight as they feed into a developing surface low over eastern Idaho. Wednesday will see highs 5-10 degrees cooler than today, or back into the upper 80s to 90 at lower elevations. Though cooler, very dry air will move into the region on Wednesday. With the surface gradient and winds aloft continuing to drive gusty winds, critical fire weather conditions will remain a concern across south-central Idaho through Wednesday evening. Winds will settle down on Thursday as the upper ridge builds back into the region. Moisture bottled up along the West Coast will advance into the region as the upper flow picks up a southerly component. This will introduce mid-high clouds and foretell a pattern change to end the week. Temperatures will warm several degrees from Wednesday to Thursday.

LONG TERM /Friday through Tuesday/

Model guidance remains in agreement that a shortwave trough will move on shore Friday and across the forecast area Saturday. Pre-frontal southerly flow will transport enough moisture over the area Friday afternoon and evening for a chance of showers and thunderstorms (20-50%) across southern areas. Shower and thunderstorm potential will expand into the West-central Mountains on Saturday afternoon and evening. Daytime high temperatures will warm into the mid and upper 90s in lower valleys Friday and then trend down 5 to 10 degrees Saturday behind the cold front. The trough begins pulling away from the area on Sunday, leaving dry conditions across the area and similar temperatures to Saturday. Dry with a warming trend Monday and Tuesday as high pressure tries to rebuild from the southwest.

AVIATION /18Z Tuesday through Wednesday/

Issued 1139 AM MDT TUE JUN 16 2026 VFR. Hot temperatures will cause high density altitudes across the area this afternoon. Surface winds: W-NW 10-20 kt gusting 25-30 kt this afternoon and evening, decreasing to W-NW 5-15 kt after 17/06Z. Winds aloft at 10kft MSL: NW 25-40 kt.

KBOI...VFR. High density altitude this afternoon. Surface winds: NW 10-20 kt. Gusts NW 25-30 kt after 17/00z, then diminishing after 17/06Z.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.