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
- Temperatures warming to around 10 degrees above normal Tuesday through Thursday.
- Breezy afternoons over the next several days.
- Slight chance of thunderstorms Tuesday and Wednesday in eastern OR and along the NV border.
- Cooler and unsettled next weekend, with notable precipitation possible.
SHORT TERM /Through Wednesday Night/
An upper level trough will remain over Alberta over the next day with west-northwest flow. Breezy west-northwest winds this afternoon. The system over Alberta will slowly move east and upper level ridging will bring warmer temperatures by Tuesday with temperatures warming to around 10 degrees above normal. Subtropical moisture will begin to get injected into the upper level ridge. A slight chance of thunderstorms in eastern OR and along the NV border on Tuesday afternoon, with increased clouds during the afternoon. A weak shortwave will move over the area on Wednesday bringing increased clouds and a slight chance of thunderstorms over eastern OR during the afternoon.
LONG TERM /Thursday through Monday/
Dry and warm conditions continue into Thursday, with subtropical moisture remaining south and east of the area. Some showers and thunderstorms may form in the central ID mountains and south along the NV border Thursday afternoon. An upper level trough from the Gulf of Alaska will move southeast into the Pacific NW late Thursday. A cold front moves through southeast OR and southwest ID on Friday with cooler and unsettled conditions through Saturday and Sunday. Significant precipitation possible with this system if the trough moves overhead. Still significant model differences though in the positioning of this trough, but wetting rains possible next weekend and much cooler temperatures as much as 10-20 degrees below normal.
AVIATION /06Z Monday through Tuesday/
Issued 1200 AM MDT MON JUN 22 2026 VFR. Surface winds: variable 10 kt overnight, then N-NW 5-15 kt Monday afternoon. Winds aloft at 10kft MSL: W 10-20 kt.
KBOI...VFR. Surface winds: variable less than 6 kt overnight. Transitioning back to NW 5-12 kt after Mon/15Z, with PM gusts around 20 kt.
BOI WATCHES/WARNINGS/ADVISORIES
ID...OR...None.
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