Winter Storm Warning Simms, Montana

Winter alerts in Simms, newest first, in effect or ended
Alert	State	Severity	Places
Winter Storm WatchEnded Up to 7 inches of snow possible, gusts up to 30 mph. Issued October 8 Ended October 9, 2026	Montana	Severe	75 places Simms Great Falls Helena Helena Valley Southeast Helena Valley West Central Helena Valley Northwest Malmstrom AFB Helena Valley Northeast Big Sky Montana City and 65 more
Winter Storm WatchEnded 7 to 14 inches of snow possible at and above pass level with 3 to 7 inches at lower elevations, gusts up to 40 mph. Issued March 30 Ended March 31, 2026	Montana	Severe	76 places Simms Great Falls Lewistown Malmstrom AFB Big Sky Montana City Clancy Sun Prairie West Yellowstone Boulder and 66 more
Winter Storm WatchEnded Gusts up to 75 mph, 9 to 19 inches of snow possible, gusts up to 55 mph. Issued March 10 Ended March 12, 2026	Montana	Severe	118 places Simms Great Falls Lewistown Malmstrom AFB Shelby Cut Bank North Browning Conrad South Browning Choteau and 108 more
Winter Storm WatchEnded Up to a tenth of an inch of ice. Issued December 24 Ended December 24, 2025	Montana	Severe	88 places Simms Great Falls Havre Malmstrom AFB Shelby Conrad Choteau Sun Prairie Fort Belknap Agency Fort Benton and 78 more
Winter Storm WatchEnded 2 to 4 inches of snow on Marias Pass, and up to 7 inches at ridge tops, 7 to 12 inches of snow possible along Marias Pass, with over a foot of snow at the higher peaks. Issued December 9 Ended December 13, 2025	Montana	Severe	146 places Simms Great Falls Havre Lewistown Malmstrom AFB Shelby Cut Bank North Browning Conrad South Browning and 136 more
Winter Storm WatchEnded 4 to 8 inches of snow possible. Issued November 25 Ended November 27, 2025	Montana	Severe	92 places Simms Great Falls Havre Malmstrom AFB Shelby Conrad Choteau Sun Prairie Fort Belknap Agency Fort Benton and 82 more