Wisconsin, 1998

Flood in Wisconsin, August 5, 1998

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

A series of thunderstorms moving slowly northeast at 10 mph trained over the Beloit area during the early morning hours. Minor urban flooding of streets to a depth of 6 inches to around 1 foot and some minor basement flooding were the main reports.

Where it happened

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
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 moving slowly northeast at 10 mph trained over the Beloit area during the early morning hours. Minor urban flooding of streets to a depth of 6 inches to around 1 foot and some minor basement flooding were the main reports. An estimated 3 to 4 inches of rain fell from about 0100CST to 0800CST, but north of Beloit, 5.6 inches of rain fell at the Rock County Airport. The resultant airport runway flooding was the 1st occurrence on record!

The radar

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

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Event by event

1 flood. Local standard time, as filed.

Flood, Rock

When
August 5, 2:00 AM CST to 8:00 AM CST
Where
Rock County, Beloit
Reported by
NEWSPAPER
Coordinates
42.671, -89.072 (the zone’s center; the record gives no point)

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.

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: 5664597.