textproduct: Pocatello

KEY MESSAGES

- Periods of rain overnight mainly in eastern mountains.

- Cooler overnight.

- Continued cooler Sunday, but heating up quickly in the week ahead.

DISCUSSION

Issued at 147 PM MDT Sat Jun 20 2026

A shortwave trough moving through Eastern Idaho today is bringing periods of showers, scattered storms, and gusty winds. It has cooled our temperatures by about 5-10 degrees from yesterday, too. We can expect breezy west winds to gust 30-40 mph this afternoon and any stronger storms that develop could produce gusty outflow winds up to 60 mph. A RED FLAG WARNING continues through the afternoon and evening due to these isolated to scattered thunderstorms. Cloud cover through the morning slowed our warm up just a bit, but now we are seeing some clearing and watching more storm development in northern Nevada and Utah as it moves into southern Idaho. This is also the area highlighted in SPC's Marginal Risk for this afternoon. Most recent runs of the CAMs show storms more confined to the South Hills and Southeastern Highlands and very limited activity up into the Snake River Plain until wrap around moisture moves through overnight.

A few isolated showers and storms will linger through Sunday, mostly up north near the Island Park area, as the trough moves eastward. Highs on Sunday reach the upper 70s to low and mid 80s through most of the eastern Magic Valley and Snake River Plain and afternoon winds will gust around 25-30 mph. The heat continues to build through the week with highs reaching the upper 80s to low 90s for many by Tuesday and lasting through Friday.

AVIATION /06Z TAFS THROUGH 06Z MONDAY/

Issued at 1029 PM MDT Sat Jun 20 2026

Winds have largely died down at BYI, PIH and IDA with main impacts some rain showers at DIJ overnight but ceilings expected to remain VFR. Will have very early showers at IDA and some vicinity at PIH but left out the showers. Generally few to broken mid level clouds Sunday and Sunday evening with mainly winds only up to 10 knots. May see gusts up to 20 knots at PIH after 18Z.

FIRE WEATHER

Issued at 918 PM MDT Sat Jun 20 2026

Thunderstorms have ended so Red Flag Warnings have expired. Rain showers are forecast to persist into the night for portions of the Caribou-Targhee NF region. Drier conditions are forecast beginning Sunday as a weak ridge tries to rebuild into the Great Basin. Warmer temperatures are on tap as well as decreased daytime humidities. The next significant Pacific system that breaks down the ridge looks to arrive by next weekend, but there is uncertainty in how much moisture may be available for storm potential.

PIH WATCHES/WARNINGS/ADVISORIES

None.