366 FXUS65 KPIH 250445 AFDPIHArea Forecast Discussion National Weather Service Pocatello ID 1045 PM MDT Wed Sep 24 2025
.KEY MESSAGES...
- Warming trend continues through Thursday, then stays around 5 to 10 degrees above normal through Sunday.
- High pressure will keep wind weak through at least Monday morning.
- Next slight chance for precipitation Sunday afternoon. More widespread rain likely Monday and Tuesday.
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.SHORT TERM /THROUGH THURSDAY NIGHT/... Issued at 1232 PM MDT Wed Sep 24 2025
No impacts in the short term period with clear skies and very warm temperatures. Lows tonight in the 30s mountains and 40s valleys. Highs Thursday Mainly in the 60s to 70s mountains and upper 70s to lower 80s valleys.
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.LONG TERM /FRIDAY THROUGH WEDNESDAY/... Issued at 1232 PM MDT Wed Sep 24 2025
Friday and Saturday will remain dry with some possible slight cooling Friday as a weak short wave moves through to the north and flow aloft turns a bit northwesterly. Highs Friday remaining mainly in the 60s to lower 70s mountains and 70s valleys. Flow begins to turn more southerly on Saturday with some moisture working into southern Idaho Sunday with a slight chance of showers and thunderstorms mainly in the southern mountains. Highs Saturday and Sunday in the 60s and 70s mountains and 70s to lower 80s valleys. Expect more widespread rain Monday through Wednesday as a stronger Pacific trof moves through eastern Idaho. Will also see significant cooling with highs Monday through Wednesday mainly in the 50s to 60s Monday and TUesday cooling to the 40s and 50s Wednesday and 60s to lower 70s valleys Monday and 60s Tuesday and Wednesday.
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.AVIATION /06Z TAFS THROUGH 06Z FRIDAY/... Issued at 1044 PM MDT Wed Sep 24 2025
High pressure remains in control through the period bringing clear skies and overall light winds.
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.FIRE WEATHER... Issued at 1232 PM MDT Wed Sep 24 2025
Things look to remain dry across the region with above normal temperatures and no precip through at least the first half of the weekend. Afternoon RHs will drop to the 15-25 percent range each afternoon. By Sunday, moisture will begin to surge northward into the area ahead of an approaching upper level trough. This should allow for at least some isolated isolated shower/storm chances but much more widespread precipitation chances are expected beginning Monday and continuing into next week with widespread wetting rainfall looking very likely along with cooler temperatures. Winds look very light through the weekend but will likely increase early next week ahead of the aforementioned trough. Widespread rain and much cooler temps at that point should mitigate any fire weather concerns.
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.PIH WATCHES/WARNINGS/ADVISORIES... None.
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SHORT TERM...GK LONG TERM...GK AVIATION...TW FIRE WEATHER...McKaughan
NWS PIH Office Area Forecast Discussion