textproduct: Pocatello

KEY MESSAGES

- Cold overnight lows continue into early in the work week. A FREEZE WARNING is in effect for tonight.

- Weak upper level troughing over the northern Rockies will interact with moisture moving in from the south to generate showers and thunderstorms today.Troughing continues through at least Wednesday night.

- Afternoon slight chance risk of thunderstorms occurs every day through at least Thursday.

DISCUSSION

Issued at 123 PM MDT Sun Apr 26 2026

Water vapor satellite imagery shows complex trough extending from low in Canada southwest to northern California. Multiple shortwave features are visible within the larger pattern. Shortwave moving through East Idaho today producing light precipitation across the eastern half of the region. Snow levels are roughly 6500-7000 ft elevation, but the liquid amounts are light so even at higher elevations, accumulations remain meager. Next shortwave feature drops through the Idaho panhandle and Western Montana this afternoon and evening, bringing additional snow showers to higher elevations. Again, amounts remain light. Across the Snake Plain, clearing is expected overnight between shortwave features for another night of cold temperatures. NBM probabilities support > 80% chance of temperatures at or below freezing for a significant portion of the Snake Plain. Areas along the interstate corridor has slightly less chances with forecast temperatures just above freezing, but still a good chance for frost overnight. Issued another FREEZE WARNING given the zone coverages of temperatures at or below 32F.

East Idaho remains under the influence of the broad complex trough through mid week, with continued unsettled conditions mainly over higher terrain, and cold temperatures near freezing for the Snake Plain growing region each night. Models shift the trough east beginning Thursday, allowing for brief ridge of high pressure to tilt across the region. Drier conditions redevelop, along with a more consistent warming trend to finish out the work week. Next system arrives for the weekend, with a return to unsettled conditions.

AVIATION /06Z TAFS THROUGH 06Z TUESDAY/

Issued at 1043 PM MDT Sun Apr 26 2026

Expect overall VFR conditions for all sites through most of the period. There are vicinity showers for DIJ currently. Any showers on station will likely bring brief MVFR conditions. Showers will drop off in the next couple of hours for DIJ. Winds have dropped off and will remain light overall overnight. Clouds will gradually lift overnight into tomorrow afternoon for most TAF sites. A weak trough will drop down over our northern areas by late tomorrow morning and bring a chance of late morning/afternoon vicinity showers for mainly DIJ and, to a lesser degree, IDA and SUN. Winds will be slightly gusty tomorrow afternoon with gusts of 15 to 20kts. Models do show snow showers over DIJ by early evening tomorrow bringing MVFR/IFR conditions.

PIH WATCHES/WARNINGS/ADVISORIES

Freeze Warning from 3 AM to 10 AM MDT Monday for IDZ051>055.