An inverted trough of low pressure extending from low pressure over the central plains combined with a mid level short wave pushing into the Northern Plains to bring heavy snow to southwest and parts of south central North Dakota April 19th and 20th.
Storm total snow amounts ranged from six to fifteen inches along and south of the Interstate 94 corridor and west of the Missouri River. Areas east of the Missouri River experienced more rain than snow, resulting in much lower storm total snowfall.
Numerous travel advisories were issued by state and county officials over the southwest as wet and slushy roads became icy after sunset. Those areas that experienced the heavier snow had snow covered roads along with very low visibilities in heavy snow.

Heavy Snow in STARK, NORTH DAKOTA
From 19-APR-11 01:00:00 to 19-APR-11 20:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The cooperative observer at Dickinson reported a storm total snowfall amount of seven inches.

Heavy Snow in HETTINGER, NORTH DAKOTA
From 18-APR-11 22:00:00 to 19-APR-11 20:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cooperative observers across Hettinger County reported storm total snowfall amounts ranging from 8.3 inches at New England to ten inches at Mott.

Heavy Snow in SIOUX, NORTH DAKOTA
From 18-APR-11 22:00:00 to 19-APR-11 22:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Storm total snowfall amounts across Sioux County were estimated at six to eight inches.

Heavy Snow in GOLDEN VALLEY, NORTH DAKOTA
From 19-APR-11 01:00:00 to 19-APR-11 20:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The cooperative observer at Golva reported a storm total snowfall amount of six inches.

Heavy Snow in BILLINGS, NORTH DAKOTA
From 19-APR-11 01:00:00 to 19-APR-11 20:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cooperative observers across Billings County reported storm total snowfall amounts of 5.5 inches at Fairfield to eight inches at Medora.

Heavy Snow in MORTON, NORTH DAKOTA
From 19-APR-11 01:00:00 to 19-APR-11 22:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cooperative observers across Morton County reported storm total snowfall amounts of six inches at Mandan to 6.8 inches at Flasher.

Heavy Snow in ADAMS, NORTH DAKOTA
From 18-APR-11 22:00:00 to 19-APR-11 20:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cooperative observers across Adams County reported storm total snowfall amounts ranging from eight inches at Reeder to 11 inches at Hettinger.

Heavy Snow in BOWMAN, NORTH DAKOTA
From 18-APR-11 22:00:00 to 19-APR-11 20:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cooperative observers and the general public across Bowman County reported storm total snowfall amounts ranging from eight inches at Scranton to 15 inches at Mud Buttes.

Heavy Snow in SLOPE, NORTH DAKOTA
From 18-APR-11 22:00:00 to 19-APR-11 20:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The cooperative observer at Marmarth reported a storm total snowfall amount of 11.5 inches.

Heavy Snow in GRANT, NORTH DAKOTA
From 18-APR-11 22:00:00 to 19-APR-11 22:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cooperative observers across Grant County reported storm total snowfall amounts ranging from eight inches at Heart Butte Dam to 12 inches at Pretty Rock.