textproduct: Boise

UPDATE

Updated aviation discussion.

KEY MESSAGES

- Breezy early this week. Near to slightly above normal temperatures through the week.

- Dry today, then a slight chance of showers late Tuesday through Friday.

SHORT TERM /Through Wednesday Night/

Issued 220 PM MST MON NOV 2 2026 Quiet conditions will persist through the short term period with no significant weather expected across southeast Oregon and southwest Idaho. Upper level ridging centered over the Pacific Northwest will provide dry weather and mostly clear skies tonight into Tuesday morning. Patchy valley fog or low stratus remains possible during the late night and early morning hours, mainly within sheltered mountain basins and river valleys.

A compact upper level low tracks eastward across the Great Basin on Tuesday. The primary impact from this system will be an increase in mid and high level cloud cover. There looks to be enough moisture and weak instability for a slight chance (15 to 20 percent) of light rain showers along the Idaho/Nevada border Tuesday afternoon and evening. Elsewhere, dry conditions will prevail with light winds.

The low will exit into the central Rockies on Wednesday while weak upper ridging rebuilds from the west. This will result in clearing skies and continued dry weather through Wednesday night. Temperatures will remain near to slightly above seasonal normals through the period, with daytime highs generally in the mid 50s to lower 60s in the valleys and upper 40s to lower 50s across the higher terrain. Lows will dip into the upper 20s and 30s for most locations.

LONG TERM /Thursday through Monday/

Issued 220 PM MST MON NOV 2 2026 A pair of weak upper level troughs will move through on Thursday and Friday, bringing a 10-30% chance of showers to northern areas. QPF totals are expected to stay under 0.10" for both events combined. Snow levels will range from 5500-7000 ft MSL, so some of the higher peaks will see a light dusting. Temperatures will be near normal with light winds. An upper level ridge will build in over the weekend, with temperatures warming to 5-10 degrees above normal by Sunday. Another upper level trough will approach the Pacific Northwest early next week, ushering in low chances of showers by Monday night. Temperatures will be similarly warmer than normal on Monday with breezier conditions Sunday and Monday as the system approaches.

AVIATION /00Z Tuesday through Wednesday/

Issued 509 PM MST MON NOV 2 2026 VFR with high clouds increasing from the west tonight. LLWS from the SE developing early tomorrow morning from KONO to KMUO. Surface winds: E-SE 5-15 kt tonight through Tuesday morning, with gusts 20-30 kt returning east of KBOI Tuesday late morning through afternoon. Winds aloft at 10kft MSL: SE-SW 10-20 kt.

KBOI...VFR with increasing high clouds from the west this evening through tomorrow. LLWS from the SE developing early tomorrow morning. Surface winds: NW 6-12 kt, becoming SE 6-12 kt tonight after 02Z.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.