087 FXUS65 KPIH 171749 AFDPIHArea Forecast Discussion National Weather Service Pocatello ID 1149 AM MDT Wed Sep 17 2025
.KEY MESSAGES...
- Warming trend expected into early next week
- No precipitation expected until at least this weekend and even then, chances will be low into next week
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.SHORT TERM /THROUGH TONIGHT/... Issued at 103 AM MDT Wed Sep 17 2025
Early morning satellite imagery shows much of the region void of cloud cover as high pressure begins to build over the area. Will likely see at least some occasional CU for areas closer to the Wyoming border where an upper low still lingers across the Cowboy State but for the most part, skies should be mostly clear today. Winds will also be light and the region will be void of precipitation. Temperatures will continue to trend upwards today, and for the days ahead, as the ridge of high pressure continues to strengthen. Low to mid 70s appear likely across the lower elevations today. Overnight lows tonight into Thu AM will mainly be in the 40s, with 30s across the high elevations. These too will trend upwards over the days ahead.
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.LONG TERM /THURSDAY THROUGH TUESDAY/... Issued at 1256 PM MDT Tue Sep 16 2025
High pressure resurges for a bit across the state, bringing dry weather until the weekend. The ridge breaks down as a couple of weaker lows scoot across to our north and west. Enough monsoon moisture is there for some showers and storms over the weekend, but nothing too widespread or concerning at the moment. High pressure rebounds early next week as a blocking pattern tries to set up over the U.S. and southern Canada. Depending where that exactly settles in will determine if we are dry under the ridge or under southwest flow and trying to pull some monsoon moisture our way. For now, the Blend of Models keeps us dry after Sunday. Temperature continue to creep back up, with some low 80s returning through Saturday and again next week...with a very brief "cooldown" on Sunday.
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.AVIATION /18Z TAFS THROUGH 18Z THURSDAY/... Issued at 1149 AM MDT Wed Sep 17 2025
VFR conditions continue under the influence of a ridge of high pressure. Generally light terrain-driven winds expected.
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.FIRE WEATHER... Issued at 103 AM MDT Wed Sep 17 2025
A warming and dry pattern looks to take hold for the remainder of the work week with no rain chances expected until at least the weekend, and even then they`ll still be low, as high pressure will be in control of local weather. Temps will rise above climatic norms by the end of the week which will bring lower elevation RHs close to 15 percent by Friday but not expecting winds to be much of a concern. Isolated precip chances return to the forecast for the weekend as a weak system looks to move north of the area. Some potential for increased winds with this but still a bit of model uncertainty with that. Confidence is high with above normal temperatures looking likely into early next week with mostly dry conditions.
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.PIH WATCHES/WARNINGS/ADVISORIES... None.
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SHORT TERM...McKaughan LONG TERM...Keyes AVIATION...DMH FIRE WEATHER...McKaughan
NWS PIH Office Area Forecast Discussion