textproduct: Boise

KEY MESSAGES

- Dry with temperatures 10 to 20 degrees above normal through next week.

- Sunday and Monday are expected to be the warmest days with near record highs.

- A minor disturbance on Monday will bring a low chance of showers and thunderstorms to higher terrain along the Idaho/Nevada border.

SHORT TERM /Through Monday Night/

An upper level ridge centered over the Desert Southwest / Four Corners area will build through Sunday, bringing warmer temperatures to our area. Highs today will be 10 to 15 degrees above normal, then climb several more degrees on Sunday. Lower valley highs are expected to reach the mid 80s to lower 90s on Sunday. Skies will be mostly clear through the weekend with light winds. This will allow low temperatures to remain cool but still above normal. High clouds will increase Sunday night ahead of a weak shortwave trough, which may bring record warm overnight lows to some areas. The trough will move through Monday, bringing a 5 to 10 percent chance of showers and thunderstorms to the higher terrain along the Idaho/Nevada border. Temperatures will be similar to Sunday, and even a couple degrees warmer in portions of southeast Oregon and far western Idaho where the trough will aid vertical mixing. Highs both Sunday and Monday will be near record highs in many locations. See PNSBOI for details.

LONG TERM /Tuesday through Saturday/

The upper level ridge will rebuild across the area after Monday, keeping temperatures 10 to 20 degrees above normal through the week and within a few degrees of record highs in many locations. Winds will be light through Thursday with mostly clear skies. An upper level trough will approach the Pacific Northwest on Friday and move inland over the weekend. Significant differences in the timing and strength of the trough exist between the ensembles, but the forecast favors cooler temperatures by Saturday. Winds will become breezy Friday and Saturday with a 10 to 20% chance of showers in the central Idaho mountains.

AVIATION /06Z Saturday through Sunday/

Issued 1139 PM MDT FRI OCT 2 2026 VFR. Areas of smoke may reduce visibility near prescribed burns. Surface winds: variable 10 kt or less. Winds aloft at 10kft MSL: SW-W 5-15 kt.

KBOI...VFR through Sunday with periods of high cloud cover. Surface winds less than 10 kt through the weekend.

Sunday Outlook...VFR with mostly clear skies. Areas of smoke may reduce visibility near prescribed burns. Surface winds: E-S 5-10 kt.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.