Winter Storm Warning Mason City, Iowa

Winter alerts in Mason City, newest first, in effect or ended
Alert	State	Severity	Places
Winter Weather AdvisoryEnded 1 to 3 inches of snow, around a light glaze of ice. Issued December 11 Ended December 11, 2025	Iowa	Moderate	307 places Mason City Des Moines West Des Moines Ankeny Waterloo Ames Urbandale Cedar Falls Marshalltown Ottumwa and 297 more
Winter Weather AdvisoryEnded Gusts up to 60 mph. Issued December 9 Ended December 10, 2025	Iowa	Moderate	232 places Mason City Waterloo Ames Cedar Falls Marshalltown Fort Dodge Waverly Webster City Clear Lake Nevada and 222 more
Winter Storm WatchEnded Blizzard conditions possible. Issued December 8 Ended December 10, 2025	Iowa	Severe	283 places Mason City Waterloo Ames Cedar Falls Marshalltown Fort Dodge Boone Waverly Carroll Denison and 273 more
Winter Weather AdvisoryEnded 3 to 5 inches of snow. Issued December 5 Ended December 7, 2025	Iowa	Moderate	158 places Mason City Des Moines West Des Moines Ankeny Ames Urbandale Marshalltown Johnston Altoona Clive and 148 more
Winter Storm WatchEnded 4 to 7 inches of snow possible. Issued December 5 Ended December 5, 2025	Iowa	Severe	303 places Mason City Des Moines West Des Moines Ankeny Waterloo Ames Urbandale Cedar Falls Marshalltown Fort Dodge and 293 more
Winter Weather AdvisoryEnded Gusts up to 35 mph. Issued November 30 Ended November 30, 2025	Iowa	Moderate	232 places Mason City Des Moines West Des Moines Ankeny Waterloo Ames Urbandale Cedar Falls Marshalltown Johnston and 222 more