Wisconsin, 2003

Winter Weather in Wisconsin, April 7, 2003

April 7, 2003 · NWS MKX · 11 events in 11 counties and zones

5 inches. The freezing drizzle left some crusty layers.

Where it happened

Every event with a place to put it; 11 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
11

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS MKX wrote it up.

A sloppy mix of heavy, wet, snow and some freezing drizzle occurred over southern Wisconsin, resulting in snow accumulations of 2 to 5.5 inches. The freezing drizzle left some crusty layers. The wind were out of the east-northeast, gusting on occasions to 30 to 34 knots (35 to 39 mph). Snow accumulations were greater near the Illinois border: up to 5.5 inches fell in South Wayne (Lafayette Co.) and around 5.0 inches was noted around Bristol (Kenosha Co.). Several social events were cancelled, and some schools cancelled classes. Synoptically, low pressure moved east across central Illinois. Warm air advection between 850 and 700 mb was maximized along the Wisconsin-Illinois border. Dry air in the lower layer of the atmosphere feeding into the low pressure reduced snow amounts to 2 to 4 inches along and north of Interstate 94 between Madison (Dane Co.) and Milwaukee (Milwaukee Co.). Newspapers noted numerous vehicle accidents during the morning commute. Icy roads resulted in one person being killed (indirectly-related) and another critically injured in an accident near Waunakee (Dane Co.) at about 0800CST.

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

11 winter weather. Local standard time, as filed.

Winter Weather, Iowa

When
April 7, 6:00 AM CST to 4:00 PM CST
Where
Iowa forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
43.001, -90.135 (the zone’s center; the record gives no point)

Winter Weather, Dane

When
April 7, 6:00 AM CST to 4:00 PM CST
Where
Dane forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
43.067, -89.418 (the zone’s center; the record gives no point)

Winter Weather, Jefferson

When
April 7, 6:00 AM CST to 4:00 PM CST
Where
Jefferson forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
43.021, -88.776 (the zone’s center; the record gives no point)

Winter Weather, Waukesha

When
April 7, 6:00 AM CST to 4:00 PM CST
Where
Waukesha forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
43.018, -88.304 (the zone’s center; the record gives no point)

Winter Weather, Milwaukee

When
April 7, 6:00 AM CST to 4:00 PM CST
Where
Milwaukee forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
43.022, -87.929 (the zone’s center; the record gives no point)

Winter Weather, Lafayette

When
April 7, 6:00 AM CST to 4:00 PM CST
Where
Lafayette forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
42.661, -90.132 (the zone’s center; the record gives no point)

Winter Weather, Green

When
April 7, 6:00 AM CST to 4:00 PM CST
Where
Green forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
42.680, -89.602 (the zone’s center; the record gives no point)

Winter Weather, Rock

When
April 7, 6:00 AM CST to 4:00 PM CST
Where
Rock forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
42.671, -89.072 (the zone’s center; the record gives no point)

Winter Weather, Walworth

When
April 7, 6:00 AM CST to 4:00 PM CST
Where
Walworth forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
42.669, -88.542 (the zone’s center; the record gives no point)

Winter Weather, Racine

When
April 7, 6:00 AM CST to 4:00 PM CST
Where
Racine forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
42.730, -87.812 (the zone’s center; the record gives no point)

Winter Weather, Kenosha

When
April 7, 6:00 AM CST to 4:00 PM CST
Where
Kenosha forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
42.573, -87.840 (the zone’s center; the record gives no point)

What these are

Winter Weather
Snow, sleet or freezing rain below warning levels that still caused disruption, damage or casualties.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Wisconsin in 2003Every state in 2003This day in weather historyWarnings in Wisconsin, April 2003

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 5348397, 5348398, 5348399, 5348400, 5348401, 5348402, 5348403, 5348404, 5348405, 5348406, 5348407.