textproduct: Boise

UPDATE

Updated aviation discussion.

KEY MESSAGES

- Hot weather expected through Independence day holiday weekend.

- Slight chance of thunderstorms over central ID mountains and south-central OR Sunday afternoon, with chances expanding area-wide Monday. - Hot and dry weather to continue through next week.

SHORT TERM /Through Monday Night/

Issued 229 PM MDT FRI JUL 3 2026 the surface and aloft will bring clear skies across the area tonight and hot and dry weather on Saturday. The hot weather will continue on Sunday, with afternoon temperatures reaching the mid to upper 90s in most lower valley locations and into the mid-80s in mountain communities. Mid-level moisture will begin to increase on Sunday afternoon across eastern Oregon bringing about a 20 percent chance of isolated thunderstorms capable of producing gusty winds.

LONG TERM /Tuesday through Saturday/

Issued 229 PM MDT FRI JUL 3 2026 the Four Corners region with continued hot temperatures and southwest flow over the area. A shortwave will move across the area on Monday morning as monsoonal moisture increases from the south. A 20-40 percent chance of thunderstorms on Monday morning into the afternoon as this feature moves across eastern OR and southwest ID. Current forecast does not have this handled well, but should come into better agreement as the meso models come into focus. Residual moisture continues into Tuesday with a chance of thunderstorms on the Idaho side. Westerly flow shunts the moisture to the east on Wednesday and Thursday with dry and breezy conditions and slightly cooler temperatures. Temperatures Monday through Wednesday around 5- 10 degrees above normal cooling to near normal on Thursday and Friday.

AVIATION /06Z Saturday through Sunday/

Issued 1221 AM MDT SAT JUL 4 2026 VFR. A few cumulus over the higher terrain and along the Nevada border in the afternoon and evening, otherwise clear skies. High density altitude in the afternoon/evening due to heat. Surface winds: variable 10 kt or less, becoming SW-NW 5-15 kt in the afternoon. NW gusts 20-30 kt KBKE to KONO in the evening. Winds aloft at 10kft MSL: SW 10-20 kt.

KBOI...VFR under clear skies. Surface winds: SE 5-10 kt, then NW 7-12 kt in the afternoon.

Sunday Outlook...Mainly VFR. Isolated thunderstorms over SE Oregon and far SW Idaho late afternoon/evening. High density altitude in the afternoon/evening due to heat. Gusty outflow winds from showers and thunderstorms up to 50 kt. Surface winds: W-NW 5-15 kt. NW gusts 20-35 kt KBKE to KONO in the evening.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.