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 ROCK, MINNESOTA
From 08-DEC-22 18:30:00 to 09-DEC-22 04:00:00 (CST-6)
Reported by: CoCoRaHS

Light freezing rain or drizzle resulted in a glaze of ice. Precipitation then quickly transitioned to snow, accumulating to 6.0 inches at the CoCoRaHS site 0.2 miles northwest of Hills.

Winter Storm in NOBLES, MINNESOTA
From 08-DEC-22 19:30:00 to 09-DEC-22 05:00:00 (CST-6)
Reported by: CoCoRaHS

Light freezing rain or drizzle resulted in a glaze of ice. Precipitation then quickly transitioned to snow, accumulating to 6.8 inches at the CoCoRaHS site 1.8 miles northwest of Bigelow and 4.0 inches at the COOP site 2 miles north-northeast of Worthington.

Winter Storm in JACKSON, MINNESOTA
From 08-DEC-22 20:30:00 to 09-DEC-22 06:00:00 (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 7.5 inches at the COOP site 2 miles northeast of Lakefield.

Winter Weather in COTTONWOOD, MINNESOTA
From 08-DEC-22 22:00:00 to 09-DEC-22 06:00:00 (CST-6)
Reported by: CoCoRaHS

Light freezing rain or drizzle resulted in a glaze of ice. Precipitation then quickly transitioned to snow, accumulating to 2.0 inches 6.5 miles east-northeast of Comfrey.

Winter Weather in MURRAY, MINNESOTA
From 08-DEC-22 21:30:00 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 3.0 inches at the COOP site in Lake Wilson.

Winter Weather in PIPESTONE, MINNESOTA
From 08-DEC-22 20:30:00 to 09-DEC-22 04:00:00 (CST-6)
Reported by: CoCoRaHS

Light freezing rain or drizzle resulted in a glaze of ice. Precipitation then quickly transitioned to snow, accumulating to 4.5 inches at the CoCoRaHS site 0.2 miles west-southwest of Edgerton and 3.0 inches at the COOP site in Pipestone.

Winter Weather in LINCOLN, MINNESOTA
From 08-DEC-22 23:00:00 to 09-DEC-22 04:00:00 (CST-6)
Reported by: CoCoRaHS

Light freezing rain or drizzle resulted in a light glaze of ice. Precipitation then quickly transitioned to snow, accumulating to 1.5 inches at the CoCoRaHS site 8 miles southeast of Hendricks.

Winter Weather in LYON, MINNESOTA
From 08-DEC-22 23:30:00 to 09-DEC-22 04:30:00 (CST-6)
Reported by: COOP Observer

Light freezing rain or drizzle resulted in a light glaze of ice. Precipitation then quickly transitioned to snow, accumulating to 3.0 inches at the COOP site in Tracy and 1.6 inches at the COOP site in Marshall.