Widespread moderate to heavy precipitation fell as heavy snow over the northern and western part of the area, and as freezing rain and sleet in far southeast South Dakota. Up to 12 1/2 inches of snow and up to a half inch of glaze from freezing rain were reported in places, with over an inch of sleet accumulation in some areas.

Heavy Snow in LAKE, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Snowfall of 8 to 11 inches, including at least 10 inches at Madison, severely limited travel and commerce, with some roads becoming blocked. Winds averaging 20 to 30 mph contributed to the problems by causing drifting snow and areas of reduced visibilities in blowing snow. The snow was mixed with sleet and freezing rain at the start of the storm.

Heavy Snow in MOODY, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Snowfall of 5 to 9 inches severely limited travel and commerce, with some roads becoming blocked. Winds averaging 20 to 30 mph contributed to the problems by causing drifting snow and areas of reduced visibilities in blowing snow. The snow was preceded by freezing rain and sleet which caused icing of surfaces, especially in the southern part of the county where the lesser snow amounts fell.

Heavy Snow in BRULE, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Snowfall of 7 to 11 inches severely limited travel and commerce, with some roads becoming blocked. Winds averaging 20 to 30 mph contributed to the problems by causing drifting snow and areas of reduced visibilities in blowing snow.

Heavy Snow in AURORA, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Snowfall of 6 to 11 inches, including 10 inches at White Lake, severely limited travel and commerce, with some roads becoming blocked. Winds averaging 20 to 30 mph contributed to the problems by causing drifting snow and areas of reduced visibilities in blowing snow. The snow was mixed with sleet and freezing rain at the start of the storm.

Heavy Snow in DAVISON, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall of 5 to 9 inches, including over 8 inches at Mitchell, severely limited travel and commerce, with some roads becoming blocked. Winds averaging 20 to 30 mph contributed to the problems by causing drifting snow and areas of reduced visibilities in blowing snow. The snow was mixed with sleet and freezing rain at the start of the storm.

Heavy Snow in HANSON, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Snowfall of 4 to 8 inches severely limited travel and commerce, with some roads becoming blocked. Winds averaging 20 to 30 mph contributed to the problems by causing drifting snow and areas of reduced visibilities in blowing snow. The snow was preceded by freezing rain and sleet, causing icing of travel surfaces, especially in the southeast part of the county where the lesser snowfall occurred.

Heavy Snow in GREGORY, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Snowfall of 2 to 8 inches severely limited travel and commerce, with some roads becoming blocked. Winds averaging 20 to 30 mph contributed to the problems by causing drifting snow and areas of reduced visibilities in blowing snow. The snow was preceded by freezing rain and sleet, causing icing of travel surfaces, especially in the southern part of the county where the lesser snowfall occurred.

Winter Storm in TURNER, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Freezing rain and sleet changed to snow over the northwest part of the county, while continuing as sleet and freezing rain to the southeast. The freezing rain and sleet caused icy travel and walking surfaces. Ice accumulations from the freezing rain were around a quarter inch in the southeast part of the county. In addition, around an inch of sleet accumulated in much of the county. Up to 3 inches of snow accumulated in the northwest.

Winter Storm in LINCOLN, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Freezing rain and sleet changed to snow over the northwest part of the county, while continuing as sleet and freezing rain to the southeast. The freezing rain and sleet caused icy travel and walking surfaces. Ice accumulations from the freezing rain were around a quarter inch in the southern part of the county including the Canton area, where broken branches were reported. In addition, around an inch of sleet accumulated in much of the county. Up to 2 inches of snow accumulated in the northwest.

Ice Storm in BON HOMME, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 20-FEB-11 15:00:00 (CST-6)
Crop damage: 0.00K
Reported by: Law Enforcement

Freezing rain and sleet produced a quarter to a half inch of glaze, topped by similar sleet accumulations. Travel and walking surfaces were made very icy, and the ice accumulations caused an unknown amount of damage to trees and power lines.

Heavy Snow in CHARLES MIX, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall of 4 to 8 inches, including 7 inches at Platte,  severely limited travel and commerce over the northwest part of the county, with some roads becoming blocked. Winds averaging 20 to 30 mph contributed to the problems by causing drifting snow and areas of reduced visibilities in blowing snow. The snow was preceded by freezing rain and sleet, causing icing of travel surfaces. In the southeast part of the county, the precipitation was mainly freezing rain and sleet, with considerable icing of driving and walking surfaces, and some ice accumulation on trees and power lines.

Ice Storm in YANKTON, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 20-FEB-11 15:00:00 (CST-6)
Crop damage: 0.00K
Reported by: Law Enforcement

Freezing rain produced around a half inch of glaze, topped by sleet accumulations of similar amounts in much of the county. Travel and walking surfaces were made very icy, and the ice accumulations caused an unknown amount of damage to trees and power lines. Damage was considerable in the Yankton area, where downed power lines produced an additional hazard.

Heavy Snow in DOUGLAS, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Snowfall of 4 to 8 inches severely limited travel and commerce, with some roads becoming blocked. Winds averaging 20 to 30 mph contributed to the problems by causing drifting snow and areas of reduced visibilities in blowing snow. The snow was preceded by freezing rain and sleet, causing icing of travel surfaces.

Winter Storm in MCCOOK, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Freezing rain and sleet changed to snow. The freezing rain and sleet caused icy travel and walking surfaces. Light ice accumulations were reported, while snowfall varied from 3 inches in the southeast corner of the county up to 7 inches northwest. Winds averaging 20 to 30 mph caused drifting and some areas of blowing snow, mainly in the northwest part of the county. Some roads in the far northwest corner were blocked by the drifting.

Winter Storm in MINNEHAHA, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Freezing rain and sleet changed to snow. The freezing rain and sleet caused icy travel and walking surfaces. Light glazing was reported from the freezing rain, with over an inch of sleet accumulation in the southern part of the county, including Sioux Falls. Snowfall varied from one inch in the southeast corner of the county up to 7 inches far northwest. Winds averaging 20 to 30 mph caused drifting and some areas of blowing snow, mainly in the northwest part of the county. Some roads in the far northwest corner were blocked by the drifting.

Winter Storm in HUTCHINSON, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Freezing rain and sleet changed to snow. The freezing rain and sleet caused icy travel and walking surfaces. Light ice accumulations were reported, while snowfall varied from one inch in the southeast corner of the county up to 7 inches far northwest. Winds averaging 20 to 30 mph caused drifting and some areas of blowing snow, mainly in the northwest part of the county. Some roads in the far northwest corner were blocked by the drifting.

Ice Storm in UNION, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 20-FEB-11 15:00:00 (CST-6)
Crop damage: 0.00K
Reported by: Law Enforcement

Freezing rain produced a quarter to a half inch of glazing, topped by sleet accumulations of similar amounts, with most of the icing in the northern part of the county. Driving and walking surfaces were made very icy, and the ice accumulations caused an unknown amount of damage to trees and power lines.

Heavy Snow in BEADLE, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Snowfall of 9 to 12 inches, including 12 inches at Huron, severely limited travel and commerce, with some roads becoming blocked. Winds averaging 20 to 30 mph contributed to the problems by causing drifting snow and areas of reduced visibilities in blowing snow.

Ice Storm in CLAY, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 20-FEB-11 15:00:00 (CST-6)
Crop damage: 0.00K
Reported by: Law Enforcement

Freezing rain produced around a half inch of glaze, topped by sleet accumulations of similar amounts in the northern two thirds of the county, with lesser ice to the south. Travel and walking surfaces were made very icy, and the ice accumulations caused an unknown amount of damage to trees and power lines.

Heavy Snow in BROOKINGS, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Snowfall of 7 to 10 inches severely limited travel and commerce, with some roads becoming blocked. Winds averaging 20 to 30 mph contributed to the problems by causing drifting snow and areas of reduced visibilities in blowing snow.

Heavy Snow in JERAULD, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall of 9 to 13 inches, including 12.5 inches at Wessington Springs, severely limited travel and commerce, with some roads becoming blocked. Winds averaging 20 to 30 mph contributed to the problems by causing drifting snow and areas of reduced visibilities in blowing snow.

Heavy Snow in SANBORN, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall of 8 to 11 inches severely limited travel and commerce, with some roads becoming blocked. Winds averaging 20 to 30 mph contributed to the problems by causing drifting snow and areas of reduced visibilities in blowing snow.

Heavy Snow in MINER, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall of 8 to 11 inches, including 10 inches at Carthage, severely limited travel and commerce, with some roads becoming blocked. Winds averaging 20 to 30 mph contributed to the problems by causing drifting snow and areas of reduced visibilities in blowing snow.

Heavy Snow in KINGSBURY, SOUTH DAKOTA
From 20-FEB-11 03:00:00 to 21-FEB-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Snowfall of 9 to 12 inches, including 12 inches at De Smet, severely limited travel and commerce, with some roads becoming blocked. Winds averaging 20 to 30 mph contributed to the problems by causing drifting snow and areas of reduced visibilities in blowing snow.