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 210 AM MDT Sat May 30 2026

Low pressure system will move northward through Wyoming today. We should see rainfall on the back side of the low with appreciable rainfall amounts east of a line from Challis to Arco to Pocatello and Malad. Models continue to show a sharp drop off in rainfall amounts along and west of this line. Although light rain will be possible through Monday over parts of the area, the more impressive amounts will fall today. 0.50 to 1.00 inches of rain is likely across the eastern highlands and the upper Snake Plain. On the western edge of the moisture, models are showing the potential for isolated thunderstorms this afternoon. Gusty winds are likely today across south Idaho, likely resulting in a lake wind advisory for the American Falls Reservoir today. Much cooler air will pour into the region today with highs in the 50s across the eastern highlands and upper Snake Plain with 60s elsewhere. Temps will return to closer to normal on Sunday with highs in the 50s for the eastern highlands, 60s for the mountains and upper Snake River Plain, and lower 70s for the lower Snake River Plain and eastern Magic Valley. OVernight lows going into Monday morning will flirt with frost criteria, but will probably stay just warm enough. Expect upper 30s for lows across the Snake River Plain with a few colder pockets possible. Temps return to the 80s by Tuesday. Models still show a weak trough passing through Wednesday or Thursday which could produce some light rain for us. But there is some uncertainty in how deep that trough is. If the trough is shallower, the better rain amounts will stay north into Montana.

AVIATION /12Z TAFS THROUGH 12Z SUNDAY/

Issued at 210 AM MDT Sat May 30 2026

Rain moving into eastern Idaho will most certainly produce MVFR conditions at IDA and DIJ today and possibly IFR conditions. Questionable if the lower ceilings make it into PIH or not. SUN is sitting right on the edge of the rain shield and models show storms developing around SUN this afternoon and then moving southeast towards PIH in the early evening.

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.