Name: Flooding and Hail in Wisconsin, April 3, 1999
Start: 1999-04-03T04:00
End: 1999-04-03T11:05
Location: Wisconsin

Where it happened

Every event with a place to put it; 4 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

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 8

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.

Scattered severe thunderstorms deposited large hail across parts of eastcentral Wisconsin. In addition, very heavy rains of 1 to 2 inches in the pre-dawn hours resulted in small stream and urban flooding in southcentral and southeast Wisconsin. In Dane county, a mudslide was reported about 3 miles north of Mt. Horeb at the intersection of Highway 78 and County Trunk J. In Racine and Kenosha counties, there were scattered reports of water over the roads in low spots both in urban areas and in the rural areas. In Milwaukee county urban flooding was reported in Wauwatosa and in the vicinity of the county zoo. Water depth on a couple roads in Wauwatosa reached 3 to 4 feet.

The radar

The Milwaukee radar (KMKX), 71 km away, was scanning. The volume nearest the first event began at 14:38 UTC.

Open the radar archive at this moment

Event by event

4 flood, 4 hail. Local standard time, as filed.

Flood, Dane

When: April 3, 4:00 AM CST to 8:00 AM CST
Where: Dane County, 3 mi N of Mt Horeb
Reported by: EMERGENCY MANAGER
Coordinates: 43.067, -89.418 (the zone’s center; the record gives no point)

Flood, Milwaukee

When: April 3, 4:00 AM CST to 8:00 AM CST
Where: Milwaukee County, Wauwatosa
Reported by: EMERGENCY MANAGER
Coordinates: 43.022, -87.929 (the zone’s center; the record gives no point)

Flood, Racine

When: April 3, 4:00 AM CST to 8:00 AM CST
Where: Racine County, Countywide
Reported by: EMERGENCY MANAGER
Coordinates: 42.730, -87.812 (the zone’s center; the record gives no point)

Flood, Kenosha

When: April 3, 4:00 AM CST to 8:00 AM CST
Where: Kenosha County, Countywide
Reported by: EMERGENCY MANAGER
Coordinates: 42.573, -87.840 (the zone’s center; the record gives no point)

Hail, Fond du Lac

When: April 3, 8:40 AM CST
Where: Fond du Lac County, Ladoga
Measured: 1 in hail
Reported by: LAW ENFORCEMENT
Coordinates: 43.720, -88.680

Hail, Fond du Lac

When: April 3, 9:00 AM CST
Where: Fond du Lac County, Campbellsport
Measured: 1 in hail
Reported by: LAW ENFORCEMENT
Coordinates: 43.600, -88.280

Hail, Fond du Lac

When: April 3, 9:00 AM CST
Where: Fond du Lac County, 4 mi SSE of Brandon
Measured: 1 in hail
Reported by: LAW ENFORCEMENT
Coordinates: 43.680, -88.730

Hail, Dodge

When: April 3, 11:05 AM CST
Where: Dodge County, Iron Ridge
Measured: 1 in hail
Reported by: TRAINED SPOTTER
Coordinates: 43.400, -88.530

What these are

Flood: Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.

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

The same day elsewhere

More

Every storm in Wisconsin in 1999 Every state in 1999 This day in weather history Warnings in Wisconsin, April 1999

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 2026-09-24. Each event’s entry at NCEI: 5690417, 5690418, 5690419, 5691018, 5690413, 5690414, 5690415, 5690416.