textproduct: Pocatello

KEY MESSAGES

- Slight chances of mainly dry thunderstorms continues each afternoon and evening through Thursday night.

- Temperatures level off for those days, then cooling trend Thursday night through Sunday.

- Increased afternoon wind Thursday through Sunday, reaching critical wind thresholds for wildland fire fighting.

DISCUSSION

Issued at 142 AM MDT Tue Aug 25 2026

Today through Thu night. Upper level high pressure centered near the four- corners region continues to shield all of southern Idaho from significant dry cold fronts. However, the south southwest air flow will continue to pump moist and unstable air into the Gem State. While it is not as unstable as the previous weekend days, it will trigger isolated thunderstorms that should mainly be dry. There is little to no change today through Thu afternoon, so temperatures will slightly warm as the moisture decreases and the upper level flow starts to flatten and become more westerly. This is due to a coastal trough that will break down the northern end of this upper level ridge starting Thu and continuing into the extended period.

Fri through Mon...As this trough swings through Thu night and Fri, thunderstorms increase in coverage and in precipitation amounts. The increased cloud cover means more mild overnight lows and cooler afternoon highs. By Sat night and Sun the trough has moved far to the east. Thus a warming trend develops at this point as skies clear. Wind stays breezy at least, and possibly windy, which means just below Wind Advisory, and strong enough to reach critical fire weather thresholds. The big question is what will humidity do. At this time, it does not dry out enough.

AVIATION /06Z TAFS THROUGH 06Z WEDNESDAY/

Issued at 909 PM MDT Mon Aug 24 2026

Light showers will drift through with little impacts overnight. Expect another round of thunderstorms Tuesday afternoon.

FIRE WEATHER

Issued at 142 AM MDT Tue Aug 25 2026

Thunderstorm coverage lowers starting today with only isolated thunderstorms expected across the Fire Weather District. Temperatures and afternoon humidity will change little over the next three days, through Thu. On Thu afternoon/evening, a trough moving though southern Canada will increase the wind and increase thunderstorm coverage for Fri afternoon/evening. Wind should reach critical fire weather thresholds, but at this time it appears as though humidity will not get dry enough.

PIH WATCHES/WARNINGS/ADVISORIES

None.