textproduct: Boise

KEY MESSAGES

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

- Tomorrow 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 with gusty outflow winds along the Idaho/Nevada border.

SHORT TERM /Through Monday Night/

High pressure will continue to build into the region through next week, bringing record breaking heat and dry conditions. Temperatures will peak tomorrow and Monday, with valley highs reaching the upper 80s, nearly 20 degrees above normal for this time of year. Haze and smoke will bring reduced visibility near prescribed burns in the mountains. A weak shortwave trough will move in from the southwest, bringing a low chance of showers/thunderstorms(5-15%) to areas near the Nevada border. Weak instability and dry conditions at the surface will allow for gusty outflow winds up to 35 mph with any showers or thunderstorms that form. Winds will remain light and terrain driven through the short term period outside of outflow winds.

LONG TERM /Tuesday through Saturday/

The upper-level ridge will rebuild over the region Tuesday and stick around through at least Thursday. This will keep temperatures well above normal, averaging 10 to 20 degrees above normal through the week and within a few degrees of record highs in many locations. Additionally with this pattern, clear skies, dry conditions, and weak winds are expected.

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 cluster analysis is converging on the trough moving overhead at some point during the weekend. With this pattern, cooler temperatures are expected over the weekend, with lower confidence on precipitation location and timing. Additionally, winds will become breezy Friday and Saturday, especially over higher terrain.

AVIATION /18Z Saturday through Sunday/

Issued 1203 PM MDT SAT OCT 3 2026

VFR. Areas of smoke and haze may reduce visibility near prescribed burns. Surface winds: variable 10 kt or less through tonight. 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 and haze may reduce visibility near prescribed burns. Surface winds: E-S 5-10 kt .

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.