textproduct: Pocatello

KEY MESSAGES

- Raw & Chilly Through Tuesday: A deep upper-level trough will keep dense cloud cover, additional light precipitation, and unseasonably cool temperatures locked over eastern Idaho, with daytime highs limited to the 40s and 50s.

- Late Week Ridge & Pleasant Next Weekend: High pressure ridging brings clearing skies and temperatures warming to seasonal norms by Thursday and Friday, setting up a much more pleasant weekend.

DISCUSSION

Issued at 115 PM MDT Mon Oct 12 2026

The second surge of moisture has largely come to an end and thus we have cancelled the Flood Watch as flood risk has ceased. Light precipitation will continue to fall through late Tuesday, predominantly across the south hills, southeast highlands, and portions of the central mountains, where roughly another 0.25" to half an inch of additional liquid accumulation is forecast over the next 24 hours. The highest elevations of the central mountains and south hills will likely receive localized amounts of 1" to 4" inches of snow accumulation.

We will continue Frost/Freeze headlines for the next couple of mornings. While National Blend probabilities do not show strong support for widespread sub-freezing temperatures, area observations indicate widespread temperatures dropped into sub-freezing range across our growing zones south and west of Idaho Falls. That said, cloud cover will continue to be a limiting factor tonight/early Tuesday morning. Any sub-freezing temperature will likely be short- lived before a quick return to the low to mid-30s. Once clouds clear, we anticipate widespread sub- freezing temperatures Wednesday morning with an end to the growing season also expected.

While early morning low temperatures will run coldest Wednesday morning, daytime temperatures will continue to warm through the duration of the extended period as high pressure builds over the region from the west. Temperatures today will start out around 15 degrees below normal with widespread 40s, warming to several degrees above normal into the 60s by early next week.

AVIATION /18Z TAFS THROUGH 18Z TUESDAY/

Issued at 1118 AM MDT Mon Oct 12 2026

Upper level low in eastern Oregon continuing to keep southerly flow aloft and pushing moisture north into Idaho. Expect to continue to see MVFR to LIFR ceilings and showers going all the way through Tuesday morning with little clearing expected. Will have showers off and on with another push overnight mainly in southern sites BYI, PIH and DIJ. Think SUN and IDA less chance for showers returning in the overnight time frame. Main impact expected to be continuing low ceilings.

FIRE WEATHER

Issued at 137 PM MDT Mon Oct 12 2026

Will see showers continuing through Tuesday with zones 427, 410,411, and 413 seeing the showers continuing the longest through the day. Expect much quicker drying in zones 475 and 476. Expect dry conditions and warming Wednesday through Sunday as this long lasting wet system finally moves out of the area.

PIH WATCHES/WARNINGS/ADVISORIES

Freeze Warning from 4 AM to 9 AM MDT Tuesday for IDZ051-052- 054-055. Frost Advisory from 4 AM to 9 AM MDT Tuesday for IDZ053.