A low pressure system that moved from the Plains, across Illinois, to the Ohio Valley brought two periods of heavy precipitation and strong northeast winds to the area. The historic late season winter storm pummeled northeast and north-central Wisconsin from the evening of April 13th through the afternoon of April 15th. The storm brought blizzard or near-blizzard conditions to much of the area and made roads impassable from time-to-time. Winds of 35 to 50 mph caused sporadic power outages and created waves of 10 to 16 feet on Lake Michigan. The persistent northeast wind caused shoreline erosion along the western shores of the lake.
New snowfall records were set at many locations as a large area of 15 to 30 inches of snow fell and winds gusted over 45 mph. Some of the highest recorded snowfall totals included, 31.6 inches near Carlsville (Door Co.), 30.6 inches in Tigerton (Shawano Co.), 30.5 inches near Stiles (Oconto Co.), 28.4 inches in Waupaca (Waupaca Co.), 27.5 inches in Peshtigo (Marinette Co.), and 25.5 inches in Suamico (Brown Co.). The strongest recorded wind speeds included 52 mph near Plover (Portage Co.), 51 mph at Marshfield (Wood Co.) and Green Bay (Brown Co.), and 50 mph near Marinette (Marinette Co.) and near Rose Lawn (Shawano Co.).
The heavy weight of the snow caused several structures to collapse or partially collapse, mainly across east-central Wisconsin. Several barn roofs collapsed in Kewaunee County, killing at least 17 cows, and parts of several barn roofs collapsed in Shawano County, resulting in the death of at least 2 cows. A barn roof collapsed near Oconto Falls (Oconto Co.) and another collapsed near New London (Waupaca Co.) killing at least 4 cows. Roofs collapsed, or partially collapsed, on at least 5 buildings in Outagamie County, including a barn in the town of Freedom where 30 cows were injured or killed. The roof of the main arena at a horse therapy center near Neenah (Wnnnebago Co.) partially collapsed. In Brown County, at least 15 businesses, including a motel and a barn, had some sort of roof collapse. Four people were trapped when a barn roof collapsed in Denmark (Brown Co.).
Snowfall totals were the highest ever recorded for an April storm in Green Bay, Appleton, Wausau and Rhinelander. This was the largest snowstorm on record in Appleton (21.2 inches), the second largest snowstorm on record in Green Bay (24.2 inches) and Wausau (20.7 inches), and the third largest snowstorm on record in Rhinelander (18.2 inches).

Winter Storm in SOUTHERN MARINETTE, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The highest reported snowfall total in southern Marinette County was 27.5 inches in Peshtigo.

Winter Storm in SOUTHERN OCONTO, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: COOP Observer

The highest reported snowfall totals in southern Oconto County were 30.5 inches near Stiles, 29.0 inches near Oconto, and 28.0 near Pulaski.

Winter Storm in MENOMINEE, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Winter Storm in NORTHERN OCONTO, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Winter Storm in DOOR, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 75.00K
Crop damage: 0.00K
Reported by: COOP Observer

The highest reported snowfall totals in Door County were 31.6 inches near Carlsville, 25.0 inches near Ephraim, 24.8 inches near Baileys Harbor, 20.5 inches in Sister Bay, and 20.2 inches near Forestville.

Winter Storm in MARATHON, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: COOP Observer

The highest reported snowfall totals in Marathon County were 20.5 inches in Weston and Wausau, and 20.0 inches in Schofield.

Winter Storm in SHAWANO, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The highest reported snowfall totals in Shawano County were 30.6 inches in Tigerton, 29.8 inches near Shawano, and 24.5 inches in Krakow.

Winter Storm in WOOD, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The highest reported snowfall totals in Wood County were 20.2 inches in Nekoosa, 18.5 inches in Pittsville, 17.3 inches in Wisconsin Rapids, 15.8 inches near Port Edwards, and 12.0 inches in Marshfield.

Winter Storm in PORTAGE, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The highest reported snowfall totals in Portage County were 20.7 inches in Stevens Point, 19.8 inches in Plover, 17.9 inches near Rudolph, 15.7 inches near Almond, and 14.5 inches near Junction City.

Winter Storm in WAUPACA, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The highest reported snowfall totals in Waupaca County were 28.4 inches in Waupaca, 28.3 inches in New London, and 28.0 inches in Scandinavia.

Winter Storm in OUTAGAMIE, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 250.00K
Crop damage: 0.00K
Reported by: COOP Observer

The highest reported snowfall totals in Outagamie County were 21.2 inches in Appleton and 19.0 inches near Kimberly.

Winter Storm in BROWN, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 400.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The highest reported snowfall totals in Brown County included 25.5 inches in Suamico, 24.2 inches at the National Weather Service, 23.7 inches in Ashwaubenon and 22.0 inches in Allouez. The weight of the snow and ice, from freezing rain and sleet that fell early during the storm, caused a partial or complete roof collapse at 14 businesses and 3 barns. A carport collapsed at an apartment building in Ashwaubenon, damaging 7 vehicles. Four people were trapped for a time when a barn roof collapsed in Denmark.

Winter Storm in KEWAUNEE, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 750.00K
Crop damage: 0.00K
Reported by: COOP Observer

The highest reported snowfall total in Kewaunee County was 18.5 at Kewaunee.

Winter Storm in WAUSHARA, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The highest reported snowfall total in Waushara County was 16.7 at Wild Rose.

Winter Storm in WINNEBAGO, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The highest reported snowfall totals in Winnebago County were 12.6 inches in Neenah, 12.0 inches near Omro, and 11.6 inches in Oshkosh.

Winter Storm in CALUMET, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The highest reported snowfall totals in Calumet County were 15.2 inches near Darboy and 11.5 inches in Chilton.

Winter Storm in VILAS, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The highest reported snowfall totals in Vilas County were 19.5 inches in Lac du Flambeau and 14.8 inches near Eagle River.

Winter Storm in ONEIDA, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The highest reported snowfall totals in Oneida County included 19.4 inches near Mc Naughton, 18.5 inches, in Hazelhurst, and 18.4 inches in Rhinelander.

Winter Storm in FOREST, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The highest reported snowfall total in Forest County was 14.1 near Argonne.

Winter Storm in FLORENCE, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The highest reported snowfall totals in Florence County were 18.0 inches near Spread Eagle and 14.1 inches in Aurora.

Winter Storm in NORTHERN MARINETTE, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The highest reported snowfall total in northern Marinette County was 13.0 inches.

Winter Storm in LINCOLN, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The highest reported snowfall totals in Lincoln County were 19.2 inches near Bradley, 18.5 inches west of Merrill, and 15.2 inches at Rice Reservoir Number 2.

Winter Storm in LANGLADE, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The highest reported snowfall totals in Langlade County were 20.1 inches near White Lake and 17.4 inches at Summit Lake.

Winter Storm in MANITOWOC, WISCONSIN
From 13-APR-18 20:00:00 to 15-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The highest reported snowfall totals in Manitowoc County were 11.0 inches in Two Rivers and 10.5 inches in Manitowoc.

Blizzard in SOUTHERN MARINETTE, WISCONSIN
From 15-APR-18 09:00:00 to 15-APR-18 13:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

The combination of heavy snow and blowing snow caused whiteout conditions at times during the late morning and early afternoon hours on April 15th.

Blizzard in SOUTHERN OCONTO, WISCONSIN
From 15-APR-18 09:00:00 to 15-APR-18 13:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The combination of heavy snow and blowing snow caused whiteout conditions at times during the late morning and early afternoon hours on April 15th.

Blizzard in DOOR, WISCONSIN
From 15-APR-18 09:00:00 to 15-APR-18 13:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The combination of heavy snow and blowing snow caused whiteout conditions at times during the late morning and early afternoon hours on April 15th.

Blizzard in SHAWANO, WISCONSIN
From 15-APR-18 09:00:00 to 15-APR-18 13:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The combination of heavy snow and blowing snow caused whiteout conditions at times during the late morning and early afternoon hours on April 15th.

Blizzard in OUTAGAMIE, WISCONSIN
From 15-APR-18 09:00:00 to 15-APR-18 13:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The combination of heavy snow and blowing snow caused whiteout conditions at times during the late morning and early afternoon hours on April 15th.

Blizzard in BROWN, WISCONSIN
From 15-APR-18 09:00:00 to 15-APR-18 13:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy snow and frequent wind gusts to around 40 mph caused whiteout conditions at times during the late morning and early afternoon hours on April 15th.

Blizzard in KEWAUNEE, WISCONSIN
From 15-APR-18 09:00:00 to 15-APR-18 13:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

The combination of heavy snow and blowing snow caused whiteout conditions at times during the late morning and early afternoon hours on April 15th.

Blizzard in MANITOWOC, WISCONSIN
From 15-APR-18 09:00:00 to 15-APR-18 13:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The combination of heavy snow and blowing snow caused whiteout conditions at times during the late morning and early afternoon hours on April 15th.

Lakeshore Flood in MANITOWOC, WISCONSIN
From 13-APR-18 08:00:00 to 16-APR-18 00:00:00 (CST-6)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Unknown

Persistent high waves during the storm damaged the dock for S.S. Badger ferry in Manitowoc.