Wisconsin, 1998

Flash Flood in Wisconsin, August 5, 1998

August 5, 1998 · NWS MKX · 1 event in 1 county or zone

A series of thunderstorms, slowly moving northeast at 10 mph, trained through the Whitewater area... dumping 4 to 8 inches of rain between 0630CST and 1100CST.

Where it happened

Every event with a place to put it; 1 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
$100,000
Crop damage
None recorded
Events
1

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 series of thunderstorms, slowly moving northeast at 10 mph, trained through the Whitewater area... dumping 4 to 8 inches of rain between 0630CST and 1100CST. The resultant flash flooding closed some city roads due to water levels of 1 to 3 feet. Several stalled cars were reported. Water poured into the lower level of two UW-Whitewater buildings. In one of the buildings, water depths reach 4 feet, resulting in damage to the A/C system and electrical system. The loss of power resulted in the loss of a police radio frequency, since the radio equipment is housed in this building. Two homes suffered contents damage, while 1 business reported substantial damage. On the south side of the city, surging waters in a drainage ditch eroded the southwest embankment of the intersection of Highways 59 and 89. The synoptic reasons for this flooding can be found in the August 4th entry for flash flooding in Columbia Co.

The radar

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

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Event by event

1 flash flood. Local standard time, as filed.

Flash Flood, Walworth

When
August 5, 9:00 AM CST to 1:00 PM CST
Where
Walworth County, Whitewater
Property damage
$100,000
Reported by
LAW ENFORCEMENT
Coordinates
42.669, -88.542 (the zone’s center; the record gives no point)

What these are

Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

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

The same day elsewhere

More

Every storm in Wisconsin in 1998Every state in 1998This day in weather historyWarnings in Wisconsin, August 1998

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: 5664602.