textproduct: Pocatello

KEY MESSAGES

- Memorial Day will bring the warmest temperatures of the stretch, with lower elevations climbing into the mid- to- upper 80s alongside another round of gusty thunderstorm winds.

- Extended Mid-Week Unsettled Pattern: The warm holiday regime breaks down Tuesday as a closed low parks itself near Lake Tahoe, kicking off a prolonged stretch of daily storm chances, breezy conditions, and cooler temperatures through the end of May. Friday and Saturday much cooler with near or slightly below normal temperatures.

DISCUSSION

Issued at 103 PM MDT Mon May 25 2026

Southerly flow aloft as upper low moves south along California coast through midweek will keep mild temperatures and moisture filtering into southeast Idaho. Will have isolated to scattered showers and thunderstorms through Friday mainly in the mountains but at least a slight chance everywhere. Highs Tuesday through Thursday mainly 70s to lower 80s so remaining well above normal. the upper level trof finally slides east Friday into Saturday with much cooler conditions with highs dropping to the lower 60s to lower 70s or about a 10 degree or so drop. Will likely be a short lived cool down with warming expected again by next Sunday into Monday. Expect less thunderstorm coverage Saturday into Monday but not completely out of the picture. Expect some breezy southerly winds daily through Friday but not expecting significant winds other than from thunderstorm outflow through the period.

AVIATION /06Z TAFS THROUGH 06Z WEDNESDAY/

Issued at 1036 PM MDT Mon May 25 2026

A few scattered showers remain around the SUN and BYI areas tonight, though impacts at the terminals are not expected. Models continue to show a round of moisture lifting northward out of Utah and into eastern Idaho overnight into Tuesday morning, though confidence in much moisture making to the ground is low. Still, have some -SHRA at DIJ and IDA in the morning. Another round of scattered showers and thunderstorms is in the forecast for Tuesday afternoon, though where exactly we see the storms is still up in the air. Have PROB30 at SUN, DIJ, and IDA where storms seem more likely and VCTS for BYI. Watch for wind gusts to increase on Tuesday afternoon even outside of storms, to around 20-25 kts. Stronger gusts around 35-40 kts will be possible if a thunderstorm or outflow tracks directly over a terminal.

FIRE WEATHER

Issued at 153 AM MDT Mon May 25 2026

Isolated to scattered thunderstorms are expected much of the week as a low pressure system moves into the region. Rainfall amounts are generally expected to be light with the best chances for wetting rains on Tuesday across the central mountains and eastern highlands with another shot for wetting rains later in the week.

PIH WATCHES/WARNINGS/ADVISORIES

None.