textproduct: Pocatello

KEY MESSAGES

- Cold temperatures again tonight means Frost Advisories and Freeze Warnings. Same is likely for Monday night, and for some on Tuesday night.

- 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 218 AM MDT Sun Apr 26 2026

Today through Tue night. An upper level trough extending westward from an upper level low centered in south central Canada will bring up some unstable and slightly moist air into the Gem State. This will bring a slight chance to likely level of showers into the forecast area for this afternoon, with highest probability of precipitation along the ID-WY border and the eastern ID-UT border. The trough will linger overhead on Mon, then exit on Tue. Leftover instability on Tue will continue some showers and thunderstorms, mostly driven by daytime heating, so highest threat in the afternoon.

Temperatures will warm compared to yesterday, mostly due to no more record cold in the teens as it was Sat morning. Mon temperatures will be about the same as Sun temperatures, both lows and highs. So expect another Frost Advisory or Freeze Warning for the five zones in the district. Tue morning lows will also likely be only slightly warmer than the two previous days, but the afternoon decreasing cloudiness will allow a warming that should prevent the sub-freezing temperatures on Tue night.

Wind should stay below Advisory criterion, but it will still be breezy to windy for both Sun and Mon afternoon. Wind on Tue will be even lighter, mostly breezy.

Wed through Sat. While Wed may be a transition day from wet weather to dry, by Thu an brief upper level ridge will be setting up over the northern Rockies for all solution clusters. Even by Wed temperatures are back to near normal, and by Fri temperatures are solidly warmer than normal. Warming trend continues for Sat. Thunderstorm risk turns negligible after Thu. Wind continues light to moderate this entire 4 day period.

AVIATION /18Z TAFS THROUGH 18Z MONDAY/

Issued at 1123 AM MDT Sun Apr 26 2026

Some moisture Has worked north into eastern Idaho around upper level low and main impact will be some lower ceilings mainly at DIJ with some MVFR conditions possible. Expect some lifting of clouds tonight with VFR conditions widespread with only mid level to high level cloud ceilings. General slope winds with 10 to 15 knots in afternoon at Byi, IDA and BYI.

PIH WATCHES/WARNINGS/ADVISORIES

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