textproduct: Boise

This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.

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 Sunday Night/

A ridge of high pressure at 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 /Monday through Friday/

A ridge will remain over 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 /18Z Friday through Saturday/

Issued 1155 AM MDT FRI JUL 3 2026 VFR. Isolated thunderstorms SE of KTWF, capable of outflows up to 20-30 kt. Surface winds: W-NW 5-15kt becoming variable 10kt or less after sunset. Winds aloft at 10kft MSL: SW 10-20 kt.

KBOI...VFR. Surface winds: NW 5-10kt, shifting to SE 5-10kt after sunset.

Weekend Outlook...VFR. Slight chance of thunderstorms late Saturday in central OR and over central ID mtns and s-central OR Sunday afternoon. High density altitude in afternoons due to heat. Surface winds: SW-NW 5-15 kt during afternoon, light at night. Showers and thunderstorms capable of producing erratic outflow wind gusts up to 50kt.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.

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