textproduct: Pocatello

KEY MESSAGES

-Occasional showers and thunderstorms through Saturday

-Heavier precipitation expected across the eastern highlands into Lemhi County and southwest Montana

-Cooler temperatures starting Friday

DISCUSSION

Issued at 103 AM MDT Thu Sep 17 2026

A low pressure system over Oregon will produce showers and storms over our area into the weekend. This system has tapped into monsoon moisture and lifted it northward. We are seeing showers and storms move north out of Utah and into central and east Idaho today. Occasional showers and storms will be the theme for the next couple days as this low slowly moves east. We probably will not see activity completely end until Saturday night when the low moves east. A marginal risk of severe storms exists both Today and Friday with strong outflow winds possible in the more intense storms. Rainfall amounts are heavily dependent upon where thunderstorms develop and lay down heavy downpours. The eastern highlands should see the best rainfall amounts with 0.50 to 0.75 inches while most of central Idaho will only see amounts of a few hundredths to perhaps 0.25 inches in the mountains.

We should see dry weather return for Sunday and beyond. We're not as concerned about frost in the Snake River Plain in the wake of this system as temps have been steadily rising as newer model solutions come in. Another system will enter the Great Basin early next week, but it looks like it may stay far enough south that we may not see any impacts from it.

AVIATION /12Z TAFS THROUGH 12Z FRIDAY/

Issued at 103 AM MDT Thu Sep 17 2026

Rounds of showers and thunderstorms are expected today. Greatest concern for storms is this afternoon where gusty, erratic winds could accompany storms. Otherwise, will probably remain vfr conditions with only a small outside chance of mvfr or ifr if a heavy storm were to pass directly over a site.

FIRE WEATHER

Issued at 103 AM MDT Thu Sep 17 2026

A low pressure system will bring showers and thunderstorms to the region over the next couple of days. Wetting rains look more likely across east Idaho and perhaps into the Salmon- Challis region, but less so across south Idaho's dispatch area. Wind gusts of 20 to 25 mph across much of the area today.

PIH WATCHES/WARNINGS/ADVISORIES

None.