A strong mid-level trough in split flow moved out of the southwestern U.S. on the morning of April 12, and phased with a strong northern stream trough across the northern Plains by April 13. Intense low pressure developed across the central Plains and moved into the Great Lakes, with a strong frontogenetic band of precipitation from Nebraska to Minnesota. Convective instability produced some spotty thunder along with the rain changing to snow.

Winter Weather in IDA, IOWA
From 12-APR-20 09:00:00 to 12-APR-20 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 2.2 inches 5 miles north northwest of Holstein and 1.8 inches 3 miles northeast of Battle Creek.  Winds at Sioux City frequently gusted from 25 to 35 mph with a peak of 38 mph, resulting in visibility of less than a mile, and briefly one-half mile or less.

Winter Storm in DICKINSON, IOWA
From 12-APR-20 05:00:00 to 12-APR-20 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 6.1 inches at Spirit Lake. Winds near Lake Park gusted frequently from 30 to 35 mph, and as high as 41 mph between 0700 and 1700CST, with visibilities less than a mile, and frequently as low as one-quarter to one-half mile.

Winter Storm in SIOUX, IOWA
From 12-APR-20 05:00:00 to 12-APR-20 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 8.0 inches at Sioux Center, 6.5 inches at Hull, and 5.0 inches at Rock Valley and Orange City. Winds near Maurice and Alton gusted frequently from 30 to 40 mph, and as high as 43 mph between 0900 and 1730CST, with visibilities less than a mile, and frequently as low as one-quarter to one-half mile.

Winter Storm in CLAY, IOWA
From 12-APR-20 06:00:00 to 12-APR-20 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 5.0 inches 1 mile north northeast of Peterson and 4.2 inches at Spencer. Winds at Spencer gusted frequently from 30 to 40 mph, and as high as 47 mph between 0830 and 1700CST, with visibilities less than a mile, and frequently as low as one-quarter to one-half mile.

Winter Storm in PLYMOUTH, IOWA
From 12-APR-20 06:00:00 to 12-APR-20 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 4.4 inches at Remsen and 4.0 inches at Le Mars. Winds at Le Mars gusted frequently from 30 to 35 mph, and as high as 41 mph between 0900 and 1700CST, with visibilities less than a mile, and frequently as low as one-quarter to one-half mile.

Winter Storm in O'BRIEN, IOWA
From 12-APR-20 05:00:00 to 12-APR-20 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 5.8 inches at Sanborn, and 5.5 inches at Sheldon and Primghar. Winds at Sheldon gusted frequently from 30 to 40 mph, and as high as 43 mph between 0900 and 1800CST, with visibilities less than a mile, and frequently as low as one-quarter to one-half mile.

Winter Storm in BUENA VISTA, IOWA
From 12-APR-20 08:00:00 to 12-APR-20 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 5.2 inches 4 miles east of Sioux Rapids. Winds at Storm Lake gusted frequently from 30 to 40 mph, and as high as 46 mph between 1000 and 1730CST, with visibilities less than a mile, and frequently as low as one-quarter to one-half mile.

Winter Weather in WOODBURY, IOWA
From 12-APR-20 08:00:00 to 12-APR-20 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Snowfall totaled 3.7 inches at Sioux City and 2.7 inches 4 miles north northeast of Hornick.  Winds at Sioux City frequently gusted from 30 to 40 mph with a peak of 46 mph, resulting in visibility of less than a mile, and occasionally one-half mile or less.

Winter Storm in LYON, IOWA
From 12-APR-20 03:00:00 to 12-APR-20 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Snowfall totaled 8.3 inches 5 miles south of Rock Rapids and 6.0 inches at Rock Rapids. Winds near Doon gusted frequently from 30 to 35 mph, and as high as 39 mph between 0300 and 1530CST, with visibilities less than a mile, and frequently as low as one-quarter to one-half mile.

Winter Storm in CHEROKEE, IOWA
From 12-APR-20 08:00:00 to 12-APR-20 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 4.0 inches at Cherokee and 3.5 inches 4 miles north of Cleghorn. Winds at Cherokee and Marcus gusted frequently from 30 to 35 mph, and as high as 39 mph between 0900 and 1700CST, with visibilities less than a mile, and frequently as low as one-quarter to one-half mile.

Winter Storm in OSCEOLA, IOWA
From 12-APR-20 04:00:00 to 12-APR-20 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 6.7 inches at Sibley. Winds near Sibley gusted frequently from 30 to 40 mph, and as high as 50 mph between 0400 and 1500CST, with visibilities less than a mile, and frequently as low as one-quarter to one-half mile.