textproduct: Boise

KEY MESSAGES

- Warm and dry conditions will persist over the next several days.

- Smoky conditions at times.

- Slightly cooler with near-normal temperatures through midweek.

SHORT TERM /Through Tuesday Night/

Strong southwest flow aloft will steer some remnant monsoonal moisture across the easternmost portions of our area over southwest ID. This pattern will continue chances of showers/thunderstorms through the morning, before drier air moves into the area today with slightly cooler temperatures and continued low humidities. Winds aloft will be weaker today and Monday. As such, generally lower afternoon breezes will be expected today through Tuesday. Gusty northwest valley winds from Baker Valley OR to the lower Treasure Valley areas of the ID-OR border will be expected each evening from tonight through Tuesday night. These heightened northwest breezes will likely bring denser smoke from wildfires over eastern OR into most of the Treasure Valley, especially during the overnight and morning hours.

LONG TERM /Wednesday through Sunday/

A strong high pressure system sitting off the four corners region, and a trough over British Columbia, will keep our area under southwesterly flow aloft. Monsoonal moisture will remain south and east of our area in this pattern, leading to a hot, dry, and breezy long-term period. Near (leaning above) normal temperatures will warm to around 5 degrees above normal come Thursday, as the aforementioned high pressure system shifts west over the Great basin. Sunday may see a cooldown to near-normal temperatures, depending on how far down troughing from the northwest coast reaches into our area.

AVIATION /06Z Sunday through Monday/

Issued 1156 PM MDT SAT JUL 25 2026 Wildfire smoke leading to reduced visibility, down to MVFR-IFR at times especially across E Oregon. A 10% chance of showers in the AM south of KBOI-KSNT line in s-central Idaho. High density altitude during afternoon/eve due to heat. Surface winds: NW-SW 5-15 kt. Gusts to 15-25 kt in the afternoon mainly for E Oregon and higher terrain of SW Idaho. Winds aloft at 10kft MSL: SW 10-30 kt.

KBOI...Generally VFR, except periods of degraded visibility due to wildfire smoke, especially during morning hours. High density altitude during afternoon/eve due to heat. Surface winds: variable around 5 kt overnight, then NW-N 5-12 kt by the afternoon.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...Air Quality Alert until 11 AM PDT Monday for ORZ062.