Winter Storm Warning Simms, Montana

Winter alerts in Simms, newest first, in effect or ended
Alert	State	Severity	Places
Winter Storm WarningEnded Heavy snow. Issued October 9 Ended October 12, 2026	Montana	Severe	87 places Simms Great Falls Helena Valley West Central Lewistown Malmstrom AFB North Browning Conrad South Browning Choteau Sun Prairie and 77 more
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 Weather AdvisoryEnded 3 to 8 inches of snow, gusts up to 35 mph. Issued March 31 Ended April 3, 2026	Montana	Moderate	69 places Simms Great Falls Lewistown Malmstrom AFB Montana City Clancy Sun Prairie Boulder Lincoln Black Eagle and 59 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
Blizzard WarningEnded Another 2 to 6 inches of snow, gusts up to 40 mph. Issued March 14 Ended March 15, 2026	Montana	Severe	21 places Simms Great Falls Malmstrom AFB Sun Prairie Black Eagle Vaughn Ulm Cascade Belt Fort Shaw and 11 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 WarningEnded Gusts up to 95 mph, 6 to 15 inches of snow. Issued March 10 Ended March 15, 2026	Montana	Severe	75 places Simms Great Falls Lewistown Malmstrom AFB North Browning Conrad South Browning Choteau Sun Prairie Browning and 65 more
Winter Weather AdvisoryEnded 3 to 6 inches of snow, gusts up to 40 mph. Issued March 8 Ended March 9, 2026	Montana	Moderate	146 places Simms Great Falls Havre Lewistown Malmstrom AFB Shelby Cut Bank North Browning Conrad South Browning and 136 more
Cold Weather AdvisoryEnded Gusts up to 60 mph, wind chills as low as 30 below zero. Issued February 17 Ended February 19, 2026	Montana	Moderate	153 places Simms Great Falls Havre Helena Valley West Central Lewistown Malmstrom AFB Shelby Cut Bank North Browning Conrad and 143 more
Winter Weather AdvisoryEnded 2 to 6 inches of snow, with up to 10 inches at mountain peaks. Issued February 15 Ended February 17, 2026	Montana	Moderate	146 places Simms Great Falls Havre Helena Valley West Central Malmstrom AFB Big Sky Shelby Cut Bank Montana City North Browning and 136 more
Snow Squall WarningEnded Intense bursts of heavy snow. Issued December 27 Ended December 27, 2025	Montana	Severe	8 places Simms Fairfield Vaughn Dutton Fort Shaw Power Cascade Colony Sun River
Cold Weather AdvisoryEnded Wind chills as low as 35 below zero. Issued December 26 Ended December 28, 2025	Montana	Moderate	113 places Simms Great Falls Lewistown Malmstrom AFB Shelby Cut Bank North Browning Conrad South Browning Choteau and 103 more
Winter Weather AdvisoryEnded Around a light glaze of ice. Issued December 24 Ended December 25, 2025	Montana	Moderate	88 places Simms Great Falls Havre Malmstrom AFB Shelby Conrad Choteau Sun Prairie Fort Belknap Agency Fort Benton and 78 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 Weather AdvisoryEnded 2 to 4 inches of snow on Marias Pass, and up to 7 inches at ridge tops. Issued December 9 Ended December 10, 2025	Montana	Moderate	161 places Simms Great Falls Helena Havre Helena Valley Southeast Helena Valley West Central Lewistown Helena Valley Northwest Malmstrom AFB Helena Valley Northeast and 151 more
Winter Weather AdvisoryEnded 2 to 5 inches of snow, gusts up to 40 mph. Issued November 30 Ended December 3, 2025	Montana	Moderate	98 places Simms Great Falls Helena Helena Valley Southeast Helena Valley West Central Lewistown Helena Valley Northwest Malmstrom AFB Helena Valley Northeast Big Sky and 88 more
Winter Storm WarningEnded 5 to 9 inches of snow possible. Issued November 26 Ended November 29, 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 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