textproduct: Boise

KEY MESSAGES

- Breezy winds through the end of the week into the weekend, with the strongest winds on Saturday. - Near to below normal temperatures through the middle of next week, except Friday with highs around 10 degrees above normal.

- A wetter pattern is likely next week with significant precipitation totals possible.

SHORT TERM /Through Saturday Night/

Behind the cold front that moved through yesterday, highs today will be near to slightly above normal with breezy winds. Gusts will be highest east of Boise through the Magic Valley with speeds 20-30 mph and lighter winds elsewhere. Skies will be mostly clear as high pressure starts to build overhead. Temperatures Friday will rise 5-10 degrees from today as the ridge moves east and southwest flow aloft develops ahead of an upper trough moving into the Pacific Northwest. Breezy winds will develop Friday afternoon, strongest over the higher terrain with gusts 25-35 mph. A cold front Friday night and Saturday will cool temperatures by 10-15 degrees with gusty winds expanding into the Snake River Valley. Despite the advancing trough and cold front, precipitation chances will remain less than 10% with increasing high clouds.

LONG TERM /Sunday through Thursday/

An upper level trough will move across the Idaho Panhandle and into western Montana during the day Sunday. This will keep most precipitation north of the area, but the northern mountains will see a 10-20% chance of showers and thunderstorms. Winds will be breezy, especially across south-central Idaho, and highs will be 5-10 degrees below normal.

Confidence has increased in a wetter and cool pattern next week as a deep upper low moves into the Pacific Northwest. Precipitation chances rise through the day Monday as the low moves onshore, then peak Tuesday and Wednesday at around 30-70% before gradually tapering off Thursday as the low slowly traverses the Pacific Northwest. However, the chance of precipitation combined across Monday through Wednesday is much higher at around 60-90%, with the highest chance in the mountains. A 10-20% chance of thunderstorms will develop, with the highest potential on Monday and Tuesday in the warmer air ahead of the trough. Precipitation totals in the ensembles vary Monday through Wednesday but average around 0.10-0.25" in the lower elevations and 0.25-0.75" in the mountains. Heavier amounts are possible with around a 25% chance of over 1" in the mountains, and thunderstorms could also produce heavy rainfall. Finally, as colder air arrives with the low, high peaks may see light snow, potentially as low as 6000 feet MSL if the center of the low moves directly overhead as depicted by some models. Winds will be breezy through the week with temperatures averaging 5-10 degrees below normal.

AVIATION /06Z Thursday through Friday/

Issued 1229 AM MDT THU JUN 4 2026 VFR with mostly clear skies. Dry cold front passage will bring elevated gusts over the Snake Plain overnight through morning. Surface winds: NW 10-20 kt with gusts to 30 kt overnight through morning, strongest near KONO and KMUO. Strong W-NW gusts up to 30 kt will continue east of KBOI in the afternoon. Winds aloft at 10kft: W 15-25kt.

KBOI...VFR with clear skies. Surface winds: NW 8-13 kt overnight through morning, then 10-15 kt with gusts to 20 kt in the afternoon.

Weekend Outlook...Mainly VFR. Mostly clear on Friday with increasing high clouds on Saturday. A 10-20% chance of showers and thunderstorms across the northern mountains Sunday. Surface winds: SW-NW 5-15 kt with gusts 15-30 kt Friday, becoming W-NW 10-20 kt with gusts 20-35 kt Saturday and Sunday.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.