Area Forecast Discussion
Issued by NWS Pocatello, ID
Issued by NWS Pocatello, ID
600 FXUS65 KPIH 222037 AFDPIH Area Forecast Discussion National Weather Service Pocatello ID 137 PM MST Wed Jan 22 2025 .SHORT TERM...Tonight through Thursday night. Satellite imagery shows generally dry north/northwest flow over East Idaho today. Some moisture skimming the Montana/Wyoming border, but little impact elsewhere. Expect temperatures to continue to weakly moderate through Thursday, though overnight lows are still expected to be sub-zero in several locations. Cloud cover begins to increase late Thursday into Thursday night ahead of system arriving for the end of the work week. DMH .LONG TERM...Friday through next Wednesday. Shortwave feature will descend out of Canada on Friday with models showing a closed low forming west of Idaho on Saturday. This system will bring very light snow accumulations to Southeast Idaho, predominately across the high terrain, with snow totals continuously trending lower with each forecast package. Current forecast accumulations range half an inch to one inch in the central mountains, 1 to 3 inches in the eastern mountains, and up to around a quarter inch across the Upper Snake River Plain, with little to no accumulation in the valleys. High pressure off the coast will build inland late Sunday into Monday and continue to amplify over the region early next week with no precipitation forecast through at least Tuesday. While the majority of ensemble cluster solutions maintain high pressure overhead through Wednesday or beyond, less than 15% of the total solutions brings another broad trough out of Canada with zonal flow or weak troughing over Idaho beginning Wednesday. Temperatures will start off below normal and slowly moderate to close to normal by the middle of next week. Cropp && .AVIATION...VFR conditions forecast with no impacts in the TAF period and light winds generally under 8 kts. Expect increasing clouds Thursday night ahead of the next shortwave feature descending from Canada, which will bring light snow Friday and Saturday. Cropp && .PIH WATCHES/WARNINGS/ADVISORIES... None. && $$