textproduct: Pocatello

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

- 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 /06Z TAFS THROUGH 06Z TUESDAY/

Issued at 941 PM MDT Sun May 3 2026

VFR conditions will continue throughout tonight and most of Monday. Very little cloud cover will be found tonight, but it will begin to increase on Monday. Shower and thunderstorm chances will increase Monday afternoon into the evening as we get more influence with general troughing over the area as a low moves to our south. Given that we have a low, but widespread chance of showers and thunderstorms at all TAF sites except BYI tomorrow, have added more PROB30 or VCSH with this issuance. Max wind gusts with a storm look to be around 30 kts.

PIH WATCHES/WARNINGS/ADVISORIES

None.

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