FXUS65 KPIH 240245 AFDPIH Area Forecast Discussion National Weather Service Pocatello ID 845 PM MDT Thu Oct 23 2025 .KEY MESSAGES... - High pressure brings warming trend to afternoon highs, near normal lows, and light wind through Friday. - Fast moving frontal system brings southerly wind first, then a mix of rain and snow Saturday through Monday. - There are signs of a potential ridge of high pressure beginning Tuesday for the latter half of the week, but isolated mountain showers may continue. && .SHORT TERM /THROUGH FRIDAY NIGHT/... Issued at 132 PM MDT Thu Oct 23 2025 Afternoon satellite imagery shows skies continuing to clear across the region as high pressure sets up over the area through much of the day on Friday. This will keep things quiet in the short term with temps running around seasonal norms for today and then ever so slightly above normal for tomorrow. This means highs in the 50s and lower 60s with lows in the low to mid 30s across the lower elevations. Mountain zones can expect overnight lows in the mid to upper 20s. The day starts out sunny once again on Friday but clouds will begin to push into the region from west to east beginning in the mid afternoon and continuing into the evening and overnight hours in association with the system that will bring unsettled weather and much colder temperatures for the weekend. && .LONG TERM /SATURDAY THROUGH THURSDAY/... Issued at 132 PM MDT Thu Oct 23 2025 Models have trended slightly slower with onset and progression of pattern change arriving Saturday. Very light valley rain and mountain rain/snow mix begins early in the day across the central mountains then spreads east Saturday afternoon and evening across the remainder of East Idaho. Initial snow levels above 7500 ft drop quickly behind the front Saturday night to valley floors across the central mountains and roughly 5500-6500 ft for the Snake Plain and southern/eastern highlands. Accumulations across the eastern highlands and valleys of the central mountains range from a dusting up to 2". Amounts increase to 3-6" across the central mountains above 7000 ft with higher amounts at ridgetops. Winds Saturday will be a warm southerly wind for most of the day, and may approach the 30 mph Wind Advisory threshold at times, with gusts 40 to 45 mph especially with passage of the front. Cold temperatures behind the front keep snow levels just above valley floors for the Snake Plain and eastern highlands Sunday, sinking Sunday night. Potential exists for lower valleys to see a rain/snow mix or a changeover to light snow, but accumulations will remain minimal, if any. Otherwise snow accumulation profiles for Sunday and Sunday night look similar to the prior 24 hours. Winds remain breezy to locally windy Sunday behind the front, but should remain well below Advisory levels. The fast westerly flow pushes one more shortwave through the region for Monday, with a continuation of the rain/snow showers, cool temperatures and breezy winds. Models are mixed in trying to introduce a weak ridge for Tuesday and Wednesday which would dry out most of East Idaho and allow for a slight warming trend. Ensembles differ on the strength of the ridge, so there is a bit of uncertainty headed into the latter half of the week with respect to temperatures and precipitation potential. && .AVIATION /06Z TAFS THROUGH 06Z SATURDAY/... Issued at 843 PM MDT Thu Oct 23 2025 VFR weather continues through Friday night. Any increase in moisture, enough for anything more than clouds, holds off until during the day Saturday. && .FIRE WEATHER... Issued at 103 AM MDT Thu Oct 23 2025 Dry weather will continue through Friday with light winds expected. Our next storm system will arrive over the weekend resulting in wetting rains for the valleys and accumulating snows above 6000 feet. && .PIH WATCHES/WARNINGS/ADVISORIES... None. && $$ SHORT TERM...McKaughan LONG TERM...DMH AVIATION...Keyes FIRE WEATHER...13