A very strong cold front was accompanied by a narrow band of moderate to heavy snowfall, as well as wind gusting to 30 to 45 mph.  Most areas saw a brief period of rain, freezing rain or sleet before changing to snow, which was accompanied by a temperature fall of 10 to 20 degrees over a six hour period.  Contraction of the band occurred due to strong elevated instability, with isolated thunder occurring in southeast South Dakota and southwest Minnesota.  While most areas received around an inch or two of snowfall, the band peaked in intensity around the Sioux Falls area with up to three to five inches.

Winter Weather in WOODBURY, IOWA
From 04-FEB-21 02:00:00 to 04-FEB-21 09:00:00 (CST-6)
Reported by: Official NWS Observations

Snowfall was briefly heavy and totaled 2.0 inches at Sioux City. Roads became hazardous, and frequent wind gusts as high as 49 mph at Sioux City produced several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in IDA, IOWA
From 04-FEB-21 03:00:00 to 04-FEB-21 12:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was briefly heavy and totaled 2.2 inches 5 miles north northwest of Holstein and 2.1 inches 3 miles northeast of Battle Creek. Roads became hazardous, and frequent wind gusts as high as 31 mph at Cherokee produced several hours of blowing snow with visibility as low as one-half to one mile.

Winter Weather in PLYMOUTH, IOWA
From 04-FEB-21 03:00:00 to 04-FEB-21 10:00:00 (CST-6)
Reported by: COOP Observer

After a brief period of light freezing rain, snowfall was briefly heavy and totaled 1.0 inch at Le Mars. Roads became hazardous, and frequent wind gusts as high as 35 mph at Le Mars produced several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in CHEROKEE, IOWA
From 04-FEB-21 03:00:00 to 04-FEB-21 12:00:00 (CST-6)
Reported by: COOP Observer

After a brief period of light freezing rain, snowfall was briefly heavy and totaled 2.5 inches 4 miles north of Cleghorn and 2.0 inches at Cherokee. Roads became hazardous, and frequent wind gusts as high as 31 mph at Cherokee produced several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in BUENA VISTA, IOWA
From 04-FEB-21 03:00:00 to 04-FEB-21 14:00:00 (CST-6)
Reported by: COOP Observer

After a brief period of light freezing rain, snowfall was briefly heavy and totaled 2.8 inches at Sioux Rapids and 2.0 inches at Storm Lake. Roads became hazardous, and frequent wind gusts as high as 41 mph at Storm Lake produced several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in CLAY, IOWA
From 04-FEB-21 03:00:00 to 04-FEB-21 15:00:00 (CST-6)
Reported by: COOP Observer

After a brief period of light freezing rain, snowfall was briefly heavy and totaled 1.6 inches 3 miles west northwest of Everly and 1.2 inches at Spencer. Roads became hazardous, and frequent wind gusts as high as 41 mph at Spencer produced several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in O'BRIEN, IOWA
From 04-FEB-21 03:00:00 to 04-FEB-21 13:00:00 (CST-6)
Reported by: COOP Observer

After a brief period of light freezing rain, snowfall was briefly heavy and totaled 2.0 inches at Primghar and 1.5 inches at Sanborn. Roads became hazardous, and frequent wind gusts as high as 38 mph at Sheldon produced several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in SIOUX, IOWA
From 04-FEB-21 02:00:00 to 04-FEB-21 11:00:00 (CST-6)
Reported by: COOP Observer

After a brief period of light freezing rain, snowfall was briefly heavy and totaled 2.0 inches at Rock Valley. Roads became hazardous, and frequent wind gusts as high as 41 mph at Sioux Center produced several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in LYON, IOWA
From 04-FEB-21 00:00:00 to 04-FEB-21 11:00:00 (CST-6)
Reported by: COOP Observer

After a brief period of light freezing rain, snowfall was briefly heavy and totaled 1.0 inch at Rock Rapids. Roads became hazardous, and frequent wind gusts as high as 38 mph at Sheldon and 32 mph at Sioux Center produced several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in OSCEOLA, IOWA
From 04-FEB-21 02:00:00 to 04-FEB-21 14:00:00 (CST-6)
Reported by: COOP Observer

After a brief period of light freezing rain, snowfall was briefly heavy and totaled 1.5 inches at Sibley. Roads became hazardous, and frequent wind gusts as high as 38 mph at Sheldon and 31 mph at Worthington produced several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in DICKINSON, IOWA
From 04-FEB-21 04:00:00 to 04-FEB-21 15:00:00 (CST-6)
Reported by: COOP Observer

After a brief period of light freezing rain, snowfall was briefly heavy and totaled 3.6 inches 4 miles northwest of Milford and 2.4 inches near Spirit Lake. Roads became hazardous, and frequent wind gusts as high as 41 mph at Spencer and 38 mph at Jackson produced several hours of blowing snow with visibility as low as one-half mile.