textproduct: Pocatello

KEY MESSAGES

- Chilly Still Today: A deep upper-level trough will keep dense cloud cover and unseasonably cool temperatures locked over eastern Idaho, with daytime highs limited to the 40s and 50s.

- Freeze Warnings & Fog Potential Tomorrow Morning: Clearing skies tonight could lead to areas of fog and will allow low temperatures to drop into the mid- to upper 20s across our growing zones Wednesday morning.

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

DISCUSSION

Issued at 128 PM MDT Tue Oct 13 2026

Light precipitation will continue to fall across the east and southeast highlands through late tonight, where another few hundredths to 0.20" of liquid accumulation is forecast. Light snow or rain/snow mix remains likely for the highest elevations.

The coldest timeframe of the forecast period will be tomorrow morning as clouds clear and temperatures drop into the mid- to upper 20s. Freeze Warnings are in effect from 3 AM and 9 AM Wednesday for all five of our growing zones. This will likely mark an end to the growing season. Another impact we may contend with Wednesday morning is areas of dense fog forming behind clearing skies late tonight.

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 again run +/- 15 degrees below normal with widespread 40s, warming into the 60s by late week. Conditions will also remain dry through the weekend.

Ensembles show the next trough moving onshore early next week with National Blend high temperatures dropping 10 to 15 degrees between Monday and Tuesday.

AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/

Issued at 1137 AM MDT Tue Oct 13 2026

Will have VFR conditions at SUN and BYI but may see some vicinity showers through 20Z at BYI. Have lingering showers through 23Z at PIH with MVFR ceilings continuing through that time with IFR ceilings ending by 20Z. Should stay VFR at IDA and have some showers there as well through 20Z. DIJ observations are out but forecast showers and MVFR ceilings there through 03Z as well. Skies should clear tonight and Wednesday morning.

FIRE WEATHER

Issued at 218 AM MDT Tue Oct 13 2026

Showers will linger this evening for zones 410, 411, 413 and 427 as upper low slow to move east. Will have dry and warming conditions Wednesday through Sunday. The next precipitation will move in next Monday into Wednesday.

PIH WATCHES/WARNINGS/ADVISORIES

Freeze Warning from 3 AM to 9 AM MDT Wednesday for IDZ051>055.