textproduct: Pocatello

KEY MESSAGES

- Unsettled conditions return this afternoon and Tuesday with isolated mainly mountain thunderstorms today and more widespread activity tonight and Tuesday.

- Lake Wind Potential Tuesday with cooler conditions in northeast winds.

- Another round of Frost/Freeze Wednesday AM.

DISCUSSION

Issued at 305 AM MDT Mon May 4 2026

Will have minor instability today and expect nothing more than isolated mainly mountain showers and thunderstorms this afternoon. Will get a strengthening low pressure system to the south and northerly flow aloft sets up Tuesday with a back door cold front moving through. After extremely warm highs in the 70s lower elevations today and 60s mountains will see significant cooling Tuesday with about a 10 to 15 degree temperature drop. Some impacts will be a likely Lake Wind Advisory for American Falls Reservoir Tuesday in strong northeast flow, and the potential for more freeze warnings Wednesday morning behind the cold front. The threat for showers will end Tuesday night with dry conditions expected Wednesday. The cooler conditions will continue through Wednesday then another significant warming trend sets up Thursday into Friday. Low elevation highs back into the 70s. Will see a chance of showers Saturday with another upper level system. Through next Monday will see changing temperatures but mainly above normal into next week. Will have intermittent breezy conditions but no significant winds expected in the long term period.

AVIATION /12Z TAFS THROUGH 12Z TUESDAY/

Issued at 537 AM MDT Mon May 4 2026

Main impact will be convection this afternoon and added prob30 thunderstorms into DIJ and SUN sites. Elsewhere just have vicinity showers at the other sites this evening and overnight. Ceilings will remain VFR.

PIH WATCHES/WARNINGS/ADVISORIES

None.