textproduct: Boise

UPDATE

Updated aviation discussion.

KEY MESSAGES

- Cool today with gusty west winds.

- Snow showers in northern mountains through Wednesday night, then valley rain and mountain snow showers Thursday.

- Strong warming Wednesday through Friday, then very windy and cooler Saturday, and continued breezy and cool Sunday.

- Warming again Monday and Tuesday, to near record high temperatures Tuesday.

SHORT TERM /Through Thursday Night/

Issued 305 AM MDT TUE MAR 10 2026 Windy and cool today under the base of a broad upper trough with very strong westerly flow aloft. Westerly gusts will reach 40 to 45 mph this afternoon in the western Magic Valley and southern highlands, just short of Wind Advisory criteria. Today will be the coolest day of the next seven with highs in the 30s in the mountains to mid 40s in southern valleys. The upper trough will exit east tonight and an upper ridge off California will build strongly inland across the Great Basin Wednesday and Thursday, resulting in rapid warming in our CWA. High temps Wednesday should average 10 degrees warmer than today, and Thursday another 8 degrees or so. Light snow showers will continue in northern mountains through Thursday but the snow level will rise to at least 6000 feet Thursday changing snow to rain in the northern valleys.

LONG TERM /Friday through Tuesday/

Issued 305 AM MDT TUE MAR 10 2026 Warm weather and gusty winds are expected Friday as weak ridging raises temperatures to 10-15 degrees above normal. While the primary storm track will remain north, expect a 50-70% chance of precipitation to prevail across northern Baker County and west-central Idaho with snow levels between 6000-7500 feet MSL. Beginning Saturday, a powerful cold front will arrive and spread precipitation chances farther south into the rest of SW Idaho and far E Oregon. This front will drop snow levels to 2500-4500 feet for the north and 5000-6000 feet across the south. However, strengthening mid-level winds will create valley shadowing effects, restricting most of the precipitation over the higher terrain in these areas. This transition will also trigger strong winds at the surface, especially in south-central Idaho where winds greater than 40 mph are expected Saturday afternoon. At this time, there is a 60% chance that winds will reach 50 mph across the Magic Valley, and a 95% chance for Camas Prairie. These conditions could damage tree limbs and make travel difficult for high-profile vehicles. Daytime temperatures are forecast to be 5-10 degrees cooler compared to Friday, with Saturday night temps lowering to near/below freezing.

By Sunday, the front will exit to the east, leaving behind breezy conditions and a few more degrees of cooling. This will be short- lived, however, as a warm upper level ridge centered over California builds into the region Monday and Tuesday. This setup will promote mostly dry conditions and a significant warming trend. By Tuesday, lower elevations may see temperatures climbing into the 70s for the first time this year.

AVIATION /12Z Tuesday through Wednesday/

Issued 538 AM MDT TUE MAR 10 2026

VFR with low/mid level ceilings. Virga/light snow showers move into the KBKE-KMYL area this morning, lasting through this evening. Clouds lower in precip, obscuring mtns and reducing conditions to low VFR-MVFR. Surface winds: W to NW 5-15 kt, gusts 20-30 kt this afternoon. Winds aloft at 10kft MSL: W 20-40 kt.

KBOI...VFR. Low/mid level ceilings with virga. Surface winds: WNW 4-8 kt this morning, then NW 8-15 kt with gusts 20-25 kt after Tue/17Z. Gusts taper off around sunset.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.