A winter storm resulted in warm-air advection precipitation lifting from south to north across northeast Nebraska, northwest Iowa, southeast South Dakota, and southwest Minnesota during the afternoon and evening of December 8th and continuing into the early morning hours of December 9th. Initially, the precipitation fell as light freezing drizzle or rain, but quickly transitioned to snow. While light to moderate snow persisted for much of the evening, heavy snow fell in a narrow convective-like band where rates exceeded 2 to 3 inches per hour. Thunder-snow was also observed with very large (plate-like) aggregates. Within this band, which stretched from near Mitchell to Sioux Falls to Spencer, snowfall amounts exceeded 6 inches with some isolated areas picking up 9 to 10 inches. Light winds persisted throughout the event, so reductions in visibility were related to the snowfall rate.

Winter Storm in LYON, IOWA
From 08-DEC-22 17:30:00 to 09-DEC-22 04:30:00 (CST-6)
Reported by: CoCoRaHS

Light freezing rain or drizzle resulted in a glaze of ice. Precipitation then quickly transitioned to snow, accumulating to 6.3 inches at the CoCoRaHS site 1.2 miles north-northeast of Larchwood and 3.7 inches at the COOP site in Rock Rapids. Other public reports across the county ranged from 6 to 8 inches.

Winter Storm in OSCEOLA, IOWA
From 08-DEC-22 19:00:00 to 09-DEC-22 05:30:00 (CST-6)
Reported by: COOP Observer

Light freezing rain or drizzle resulted in a glaze of ice. Precipitation then quickly transitioned to snow, accumulating to 7.0 inches at the COOP site in Sibley.

Winter Storm in DICKINSON, IOWA
From 08-DEC-22 19:30:00 to 09-DEC-22 05:30:00 (CST-6)
Reported by: COOP Observer

Light freezing rain or drizzle resulted in a glaze of ice. Precipitation then quickly transitioned to snow, accumulating to 7.7 inches at the COOP site at Spirit Lake. Other public reports across the county ranged from 6 to 9 inches.

Winter Weather in SIOUX, IOWA
From 08-DEC-22 17:00:00 to 09-DEC-22 04:30:00 (CST-6)
Reported by: COOP Observer

Light freezing rain or drizzle resulted in a glaze of ice. Precipitation then quickly transitioned to snow, accumulating to 4.2 inches at the COOP site in Orange City, 3.0 inches at the COOP site in Rock Valley, and 3.0 inches at the COOP site 2 miles southeast of Sioux Center.

Winter Storm in O'BRIEN, IOWA
From 08-DEC-22 18:00:00 to 09-DEC-22 05:00:00 (CST-6)
Reported by: COOP Observer

Light freezing rain or drizzle resulted in a glaze of ice. Precipitation then quickly transitioned to snow, accumulating to 6.8 inches at the COOP site in Sanborn, 5.0 inches at the COOP site in Primghar, and 5.0 inches at the COOP site in Sheldon. Other public reports across the county ranged from 5 to 8 inches.

Winter Storm in CLAY, IOWA
From 08-DEC-22 18:30:00 to 09-DEC-22 05:30:00 (CST-6)
Reported by: COOP Observer

Light freezing rain or drizzle resulted in a glaze of ice. Precipitation then quickly transitioned to snow, accumulating to 6.5 inches at the COOP site 1 mile north of Spencer. Other public reports across the county ranged from 6 to 8 inches.

Winter Weather in PLYMOUTH, IOWA
From 08-DEC-22 16:00:00 to 09-DEC-22 04:30:00 (CST-6)
Reported by: COOP Observer

Light freezing rain or drizzle resulted in a glaze of ice. Precipitation then quickly transitioned to snow, accumulating to 4.4 inches at the COOP site in Remsen and 4.0 inches at the COOP site in Le Mars.

Winter Weather in CHEROKEE, IOWA
From 08-DEC-22 17:00:00 to 09-DEC-22 05:00:00 (CST-6)
Reported by: COOP Observer

Light freezing rain or drizzle resulted in a glaze of ice. Precipitation then quickly transitioned to snow, accumulating to 3.0 inches at the COOP site in Cherokee.

Winter Weather in BUENA VISTA, IOWA
From 08-DEC-22 18:00:00 to 09-DEC-22 03:00:00 (CST-6)
Reported by: COOP Observer

Light freezing rain or drizzle resulted in a glaze of ice. Precipitation then quickly transitioned to snow, accumulating to 5.0 inches at the COOP site in Sioux Rapids and 3.2 inches at the COOP site in Storm Lake.

Winter Weather in WOODBURY, IOWA
From 08-DEC-22 15:30:00 to 09-DEC-22 04:00:00 (CST-6)
Reported by: COOP Observer

Light freezing rain or drizzle resulted in a glaze of ice. Precipitation then quickly transitioned to snow, accumulating to 1.4 inches at the COOP site in Sioux City (KSUX).

Winter Weather in IDA, IOWA
From 08-DEC-22 16:30:00 to 09-DEC-22 02:30:00 (CST-6)
Reported by: COOP Observer

Light freezing rain or drizzle resulted in a glaze of ice. Precipitation then quickly transitioned to snow, accumulating to 2.3 inches 5 miles west-northwest of Holstein and 1.2 inches 5 miles northeast of Battle Creek.