textproduct: Boise

KEY MESSAGES

- Patchy mountain valley fog this morning.

- Continued breezy in the Magic Valley of Idaho today.

- Warming and drying trend into early next week.

SHORT TERM /Through Sunday Night/

Dry northwesterly flow is overspreading the region this morning as the trough of low pressure exits into the northern plains. Surface observations indicate significant drying across the area with dewpoints around 10 degrees lower than yesterday. Mid and high clouds will linger over the central Idaho mountains and portions of far northeast Oregon into the late morning before thinning as high pressure builds in from the west. Patchy fog will be a possibility for higher valley areas, but drying low levels will prevent a widespread event. High pressure is expected to build into the weekend with warming and drying each day. Temperatures will be back above normal each day.

LONG TERM /Monday through Friday/

Very good agreement amongst operational and ensemble data through Monday with high pressure dominating across the west. More broadly, the ridge remains the main weather feature all the way northward along the west coast of North America into at least the middle of next week. There are indications, shown by a majority of ensemble guidance, that a wave of low pressure will be able to work through the ridge and influence our weather Tuesday through at least Thursday. The exact impacts remain uncertain with a broad spread in the ensembles regarding the depth and timing of the trough working into the western US. Blended guidance indicates a chance of precipitation and moderation of temperatures for Tuesday Night into early Friday.

AVIATION /06Z Friday through Saturday/

Issued 1121 PM MDT THU APR 2 2026 Generally VFR. Localized IFR-LIFR in patchy valley fog in sheltered mountain valleys through Friday morning. Mountains obscured in fog and low clouds. Surface winds: variable less than 10 kt. Winds aloft at 10kft MSL: W-NW 25-35 kt.

KBOI...VFR. Clearing overnight with low clouds and patchy fog near the foothills. Low confidence (30% chance) in brief MVFR/IFR ceilings early Friday morning. Surface winds: variable less than 6 kt.

Weekend Outlook...Generally VFR with warming and drying conditions this weekend. Localized IFR-LIFR conditions and mountain obscuration each morning with patchy fog in sheltered mountain valleys. Surface winds: SW-SE under 10 kt.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None. OR...None.