textproduct: Pocatello

KEY MESSAGES

- Cooler temperatures today give way to warming trend into late week.

- Breezy to windy conditions on Thursday and Friday.

- Precipitation chances return over the weekend, mainly across our northern mountains.

DISCUSSION

Issued at 126 PM MDT Mon Sep 7 2026

Satellite and radar imagery show main circulation associated with PacNW trough has shifted northeast of the region, leaving dry slot and post-frontal air mass in place over East Idaho. Breezy winds continue through the Snake Plain with gusts 30-35 mph across the northern portions of the region. Winds should peak by early afternoon, then decrease through the remainder of the evening. Cool temperatures today behind the front give way to gradual warming beginning Tuesday and continuing through Thursday along with dry conditions. Ensembles favor spoke of broad trough dropping through the PacNW into the region by Friday, reintroducing a chance of precipitation by the weekend. Winds increase Thursday through Saturday in response, and winds could approach Wind Advisory criteria with gusts exceeding 40 mph for both Thursday and Friday. There is slight differences in timing of precipitation arrival between the NBM and the ensemble means and clusters, but we could see a few showers and thunderstorms by late Friday, increasing into Saturday. The increase in moisture should provide a slight cooling trend into the weekend, as well.

AVIATION /18Z TAFS THROUGH 18Z TUESDAY/

Issued at 1157 AM MDT Mon Sep 7 2026

Mostly clear skies forecast throughout the period with gusty winds areawide through early this evening. Southwest to west winds with gusts 20 to 30 kts at KPIH, KIDA, and KDIJ and around 20 kts at KBYI and KSUN.

FIRE WEATHER

Issued at 126 PM MDT Mon Sep 7 2026

Winds will remain elevated today as the trough continues lifting through Idaho and the center of low pressure shifts northeastward into Canada. Daytime temperatures today will be much cooler behind the cold front, with highs maxing out in the upper 60s to low 70s. Flow aloft will remain westerly through late week with an area of high pressure to our south and troughing to our north. Conditions will remain dry and trend warmer under clear skies through at least Thursday. Daytime highs will return to the 70s and 80s by Wednesday or Thursday, after which temperatures cool again with highs in the 60s to 70s possible again early next week. Winds will increase again Thursday through Saturday as the pressure gradient tightens. During the weekend timeframe, a Pacific low will work eastward to our north, with models showing the track of the low bringing precipitation chances to our northern mountains. Prior to this increase in moisture, we could observe areas of critical fire weather conditions across south-central Idaho where areas of relative humidity ranging 10 to 15 percent may overlap with wind gusts over 30 mph.

PIH WATCHES/WARNINGS/ADVISORIES

None.