textproduct: Boise

UPDATE

Updated aviation discussion.

KEY MESSAGES

- Gusty winds tonight especially again along the I-84 corridor from Baker City to Ontario.

- The heat returns by midweek with 100 degree temperatures likely at lower elevations.

- Smoky conditions continue through the week.

SHORT TERM /Through Tuesday Night/

Issued 238 PM MDT SUN AUG 2 2026 A reinforcing shortwave trough will swing through the Pac NW overnight, bringing another wind push through SE Oregon and the Snake Plain of SW Idaho. Similar to last night, the strongest wind gusts (30-45 mph) will impact the I-84 corridor from Baker City to Ontario, including portions of Washington, Payette, Canyon and Malheur counties. Otherwise expect gusts 25-35 mph across SE Oregon and further up the Snake Plain. Monday will see breezy conditions continue across open terrain with temperatures (lows and highs) running about 10 degrees below normal. Winds will be strongest across the Snake Plain east of Boise where gusts will reach 20-30 mph. Winds weaken and temperatures trend warmer on Tuesday as an upper ridge builds along the coast. Areas near/downwind of large fires will continue to deal with thicker smoke through Monday morning. Come Monday afternoon a shift to a more northerly flow aloft will bring smoke into the area from the large fires in WA.

LONG TERM /Wednesday through Sunday/

Issued 238 PM MDT SUN AUG 2 2026 A ridge of high pressure will reamplify over the area starting on Wednesday and bring warmer conditions through the weekend. Temperatures will be 5-10 degrees above normal with lower valleys near 100 degrees Thursday through Sunday. Smoky conditions will continue from area wildfires. Conditions will remain dry and breezy.

AVIATION /00Z Monday through Tuesday/

Issued 534 PM MDT SUN AUG 2 2026

Reduced visibility due to wildfire smoke, with areas of MVFR/IFR and mountain obscuration. Surface winds: W-NW 10-20 kt with gusts 15-25 kt, except gusts 30-40 kt between KBKE-KONO this evening. Then W-N 5-15 kt overnight, with areas of gusts to 15-25 kt. Winds aloft at 10kft MSL: W 15-30 kt becoming NW 5-15 kt after Mon/12Z.

KBOI...Smoky, low VFR with MVFR at times through Monday. Then, significant degradation (MFR-IFR likely) expected Monday evening. Surface winds: NW 5-15 kt. Occasional gusts around 20 kt through this evening.

BOI WATCHES/WARNINGS/ADVISORIES

ID...Air Quality Alert until 2 PM MDT Monday for IDZ011-012-014-015- 029-033. OR...Air Quality Alert until 3 PM MDT /2 PM PDT/ Monday for ORZ061>064.