textproduct: Pocatello

KEY MESSAGES

- Wet weather today for much of east Idaho, remaining dry across central Idaho.

- Lake Wind Advisory in effect for the American Falls Reservoir for today.

- Chilly weather over the weekend into early next week.

DISCUSSION

Issued at 128 PM MDT Sat May 30 2026

Upper trough ejecting northeast through East Idaho today, with main low over SW Wyoming early this afternoon. Wrap around moisture producing solid area of rainfall across the eastern highlands and northern portions of the Snake Plain. Per observations, rainfall gradient lies roughly from Challis to Pocatello to Bear Lake. Within the heaviest precipitation so far, totals have already exceeded one-half inch in some locations. Band of rainfall expected to rotate west, then shift north through the remainder of the day, but still mostly remain east of the aforementioned gradient line. Liquid QPF amounts still look similar to previous forecasts. Breezy winds continue especially from the Lower Snake River Plain west through the Magic Valley. LAKE WIND ADVISORY remains in effect for American Falls Reservoir, but winds remain just shy of WIND ADVISORY for the Eastern Magic region. Rainfall continues across the northeast corner through early Sunday as the upper trough continues to pull away. Residual moisture and proximity to the low may be enough for isolated to scattered showers and thunderstorms mainly across the north Sunday afternoon, then again Monday afternoon. Temperatures Sunday night/Monday morning will be coolest, and may be close to a FROST ADVISORY for northern zones.

There is increasing confidence that a shortwave feature moving through the mean flow will have the potential to produce showers and thunderstorms, mainly across the northern zones into Montana for both Wednesday and Thursday. Breezy winds will be possible as well for Thursday. The rest of the week looks dry with temperatures returning to the 80s for Tuesday and beyond.

AVIATION /18Z TAFS THROUGH 18Z SUNDAY/

Issued at 1149 AM MDT Sat May 30 2026

A low pressure system will continue rotating northeastward through WY today as wraparound moisture filters into eastern Idaho through late tonight/early Sunday. KDIJ will see wx impacts through late Sunday morning. MVFR CIGs and VIS are forecast in moderate rain at KIDA and KDIJ. Too little confidence in MVFR conditions at KPIH or IFR at the aforementioned sites to included in the forecast. Best chance of thunderstorms this afternoon will be further northwest in the KSUN region and have therefore included a PROB30 for -TSRA through 24z. Outside of storms, westerly winds will remain breezy through the period with gusts ranging 20 to 30kts at KPIH and KIDA and up to 35 kts at KBYI.

FIRE WEATHER

Issued at 210 AM MDT Sat May 30 2026

Wetting rains are likely across much of East Idaho today. Parts of the Central Idaho Dispatch could see wetting rains as well. South Idaho Dispatch will most likely stay mostly dry with gusts to 30 mph likely across much of the Magic Valley today. Drier air will work into the region on Sunday with gusts to 25 mph will likely across much of South Idaho.

PIH WATCHES/WARNINGS/ADVISORIES

None.