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.

UPDATE

Updated aviation discussion.

KEY MESSAGES

- Dry with temperatures averaging 10-15 degrees above normal through next week.

- Minor disturbance on Monday could bring showers to higher terrain along the NV border and south-central Idaho mountains.

SHORT TERM /Through Saturday Night/

Issued 308 AM MDT THU OCT 1 2026 An upper ridge centered over the far Southwest U.S. will build northward today and influence the forecast area. Temperatures in southeast Oregon and southwest Idaho will climb around 10 degrees above normal, pushing low elevation temps into the low 80s this afternoon. Further warming is expected Friday and Saturday as high pressure expands, with many lower sites reaching mid 80s. A weak feature will pass to the north on Friday and bring a period of high cloud cover and west/northwest surface winds, but fair conditions are still anticipated through Saturday.

LONG TERM /Sunday through Thursday/

Issued 308 AM MDT THU OCT 1 2026 The aforementioned ridge will shift east on Sunday, opening the door for warm southerly flow to infiltrate the area. Temperatures will climb further above normal, peaking in the upper 80s to around 90 for lower sites. A weak disturbance will pass through the region late Sunday into Monday, increasing cloud cover and supporting a low chance (5-10%) of showers near the NV border and south-central Idaho mountains. Temperatures will cool by a couple of degrees Mon/Tue, before the upper ridge rebounds and warm and dry conditions prevail.

AVIATION /12Z Thursday through Friday/

Issued 527 AM MDT THU OCT 1 2026

Generally VFR. Areas of thin smoke layers aloft/haze at the surface. Patchy fog in sheltered mountain valleys through morning. Surface winds: variable up to 12 kt. Winds aloft at 10kft MSL: W-SW 10-20 kt.

KBOI...VFR and mostly clear. Surface winds: light and variable through morning, then NW 3-8 kt in the afternoon. Transitioning to SE 3-8 kt late tonight.

Weekend Outlook...VFR Friday through Sunday. Potential for thin smoke layers aloft and haze at the surface due to prescribed burns in the region. Surface winds: SW-NW 5-15 kt Friday, with afternoon gusts around 20 kt near NV border. Then, variable up to 10 kt Sat/Sun.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.

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