textproduct: Boise

UPDATE

Updated aviation discussion.

KEY MESSAGES

- Breezy today. Near to slightly above normal temperatures through the week, rising to above normal by the weekend.

- Scattered showers near the Idaho/Nevada border today, and across the north on Thursday.

SHORT TERM /Through Thursday Night/

Issued 230 AM MST TUE NOV 3 2026 A closed low pressure system will move into northern California today, then across northern Nevada tonight. High clouds will move across the area today ahead of the low, and southeast winds will become breezy across the Snake Plain with gusts 20-35 mph. Highs will be up to 5 degrees warmer than yesterday under increased southerly flow aloft, with the most warming across southern Idaho. Overall, highs will be near to slightly above normal. Scattered showers will develop near the Idaho/Nevada border late this afternoon into tonight, but elsewhere it will remain dry.

Clouds will decrease on Wednesday with lighter winds as the low pulls away and a shortwave ridge moves overhead. This ridge will be short-lived as a weak trough moves into the area on Thursday, bringing clouds and a 10-30% chance of showers, with the highest chance across the north. Snow levels will be around 4500-5500 feet with a light dusting of snow possible in the mountains. Temperatures will be 5-10 degrees cooler on Thursday in the mountains with only a couple degrees of cooling in the valleys. Winds will remain light. Patchy fog will develop each night this week in sheltered basins.

LONG TERM /Friday through Tuesday/

Issued 230 AM MST TUE NOV 3 2026 A trough will move onto the British Columbia coast on Friday while a ridge off the coast of California builds inland and north. The ridge should keep atmospheric river moisture associated with the trough to the north with only a 10-20% chance of showers across our northern areas on Friday. This general pattern will hold through the weekend and into early next week, keeping our area mostly dry while southwest flow increases temperatures to 5-10 degrees above normal. Lower valleys will see highs in the 60s with 40s and 50s in the mountains. The trough will edge further down the coast on Sunday, bringing breezy conditions and increased clouds but a less than 10% chance of precipitation. Precipitation chances will climb to 10-30% by Tuesday as this pattern progresses.

AVIATION /12Z Tuesday through Wednesday/

Issued 446 AM MST TUE NOV 3 2026 VFR under mid to high clouds. LLWS from the SE this morning from KONO to KMUO. Scattered showers developing tonight near the Idaho/Nevada border. Localized MVFR possible in precip. Snow levels 6-7kft MSL. Surface winds: E-SE 5-15 kt, with gusts 20-30 kt south/east of KEUL late this morning through the afternoon, becoming variable less than 10 kt this evening. Winds aloft at 10kft MSL: SE-SW 10-20 kt.

KBOI...VFR under high clouds. LLWS from the SE this morning. Surface winds: SE 7-13 kt, gusts 20-25 kt possible in the afternoon, becoming variable less than 6 kt by early evening.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.