A deep trough across the southwestern U.S. in the early morning of Saturday, December 28 pushed eastward through the day, allowing low pressure to organize near the Oklahoma and Texas Panhandles. The storm intensified as it moved into eastern Nebraska and western Iowa by 0600CST December 29. Strong warming aloft ahead of the system led to periods of light rain or light mixed precipitation, while heavy snow organized in the trowal over central and northeast South Dakota.
Impacts from the storm became significant as the storm closed off in the mid-levels and slowed movement, only reaching southern Minnesota by 0600CST December 30. Precipitation changed over to snow as colder air collapsed southward, and winds increased to a gusty 40 to 55 mph across southeast South Dakota and adjacent areas. Snowfall totals ranged from 10 to 18 inches from the James River Valley westward, 2 to 7 inches across southwest Minnesota, and 1 to 3 inches across much of northwest Iowa.

Winter Weather in ROCK, MINNESOTA
From 28-DEC-19 02:00:00 to 30-DEC-19 14:00:00 (CST-6)
Reported by: Law Enforcement

Light mixed precipitation combined with temperatures hovering near freezing resulted in a minor glaze of ice accumulation on December 28 and early December 29. Snowfall developed in the afternoon of December 29, and continued into December 30 producing hazardous travel. Snowfall totaled 3.3 inches at Luverne. Wind gusts reached as high as 44 mph near Beaver Creek and 37 mph at Luverne on Monday, December 30, resulting in blowing and drifting snow.

Winter Weather in NOBLES, MINNESOTA
From 28-DEC-19 02:00:00 to 30-DEC-19 15:00:00 (CST-6)
Reported by: COOP Observer

Light mixed precipitation combined with temperatures hovering near freezing resulted in a minor glaze of ice accumulation on December 28 and early December 29. Snowfall developed in the afternoon of December 29, and continued into December 30 producing hazardous travel. Snowfall totaled 2.3 inches at Worthington. Wind gusts reached as high as 40 mph at Worthington on Monday, December 30, resulting in blowing and drifting snow.

Winter Weather in PIPESTONE, MINNESOTA
From 28-DEC-19 02:00:00 to 30-DEC-19 10:00:00 (CST-6)
Reported by: COOP Observer

Light mixed precipitation combined with temperatures hovering near freezing resulted in an ice accumulation to around a tenth of an inch on December 28 and early December 29. Snowfall developed in the morning of December 29, and continued into December 30 producing hazardous travel. Snowfall totaled 2.1 inches near Edgerton and 1.0 inches at Pipestone. Wind gusts reached as high as 38 mph near Ward and 39 mph at Marshall Monday, December 30, resulting in blowing and drifting snow.

Winter Weather in LINCOLN, MINNESOTA
From 28-DEC-19 02:00:00 to 30-DEC-19 12:00:00 (CST-6)
Reported by: COOP Observer

Light mixed precipitation combined with temperatures hovering near freezing resulted in an ice accumulation to around a tenth of an inch on December 28 and early December 29. Snowfall developed in the afternoon of December 29, and continued into December 30 producing hazardous travel. Snowfall totaled 4.3 inches 8 miles southeast of Hendricks. Wind gusts reached as high as 39 mph at Marshall and 36 mph at Brookings by early Monday, December 30, resulting in blowing and drifting snow.  A driver and passenger sustained injuries (indirect) when the vehicle they were traveling in lost control on a slippery curve and entered the ditch around 1145CST on December 28.

Winter Weather in LYON, MINNESOTA
From 28-DEC-19 02:00:00 to 30-DEC-19 12:00:00 (CST-6)
Reported by: COOP Observer

Light mixed precipitation combined with temperatures hovering near freezing resulted in an ice accumulation to around a tenth of an inch on December 28 and early December 29. Snowfall developed in the afternoon of December 29, and continued into December 30 producing hazardous travel. Snowfall totaled 6.7 inches at Minneota, 6.1 inches at Marshall, and 3.9 inches at Tracy. Wind gusts reached as high as 39 mph at Marshall by early Monday, December 30, resulting in blowing and drifting snow.

Winter Weather in MURRAY, MINNESOTA
From 28-DEC-19 03:00:00 to 30-DEC-19 22:00:00 (CST-6)
Reported by: COOP Observer

Light mixed precipitation combined with temperatures hovering near freezing resulted in an ice accumulation to around a tenth of an inch on December 28 and early December 29. Snowfall developed in the afternoon of December 29, and continued into December 30 producing hazardous travel. Snowfall totaled 5.0 inches 5 miles north of Currie and 2.9 inches at Lake Wilson. Wind gusts reached as high as 40 mph near Jeffers and 38 mph at Windom on Monday, December 30, resulting in blowing and drifting snow.

Winter Weather in JACKSON, MINNESOTA
From 28-DEC-19 04:00:00 to 30-DEC-19 20:00:00 (CST-6)
Reported by: COOP Observer

Light mixed precipitation combined with temperatures hovering near freezing resulted in a minor glaze of ice accumulation on December 28 and early December 29. Snowfall developed in the afternoon of December 29, and continued into December 30 producing hazardous travel. Snowfall totaled 2.4 inches 2 miles northeast of Lakefield. Wind gusts reached as high as 39 mph near Lakefield and 35 mph at Jackson on Monday, December 30, resulting in blowing and drifting snow.

Winter Weather in COTTONWOOD, MINNESOTA
From 28-DEC-19 06:00:00 to 30-DEC-19 22:00:00 (CST-6)
Reported by: COOP Observer

Light mixed precipitation combined with temperatures hovering near freezing resulted in a minor glaze of ice accumulation on December 28 and early December 29. Snowfall developed in the afternoon of December 29, and continued into December 30 producing hazardous travel. Snowfall totaled 2.7 inches at Windom. Wind gusts reached as high as 40 mph near Jeffers and 38 mph at Windom on Monday, December 30, resulting in blowing and drifting snow.