Flash Flood, Winona
- When
- August 9, 5:10 PM CST to 8:00 PM CST
- Where
- Winona County, Stockton
- Property damage
- $150,000
- Crop damage
- $55,000
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 43.987, -91.779 (the zone’s center; the record gives no point)
Flash Flooding in Minnesota, August 9, 1998
3 to 5 inches of rain fell in about an hour and a half, causing flash flooding in the bluff country of southeast Minnesota. 5 feet of water covered Mankato Avenue and Highway 61, while rock slides occurred near Stockton.
Where it happened
Every event with a place to put it; 3 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
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- $210,000
- Crop damage
- $145,000
- Events
- 3
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 ARX wrote it up.
3 to 5 inches of rain fell in about an hour and a half, causing flash flooding in the bluff country of southeast Minnesota. In the city of Winona, 1.5 feet of water covered Mankato Avenue and Highway 61, while rock slides occurred near Stockton.
The radar
The La Crosse radar (KARX), 51 km away, was scanning. The volume nearest the first event began at 23:09 UTC.
Event by event
3 flash flood. Local standard time, as filed.
Flash Flood, Houston
- When
- August 9, 7:30 PM CST to 8:30 PM CST
- Where
- Houston County, 5 mi W of La Crescent
- Property damage
- $35,000
- Crop damage
- $40,000
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 43.671, -91.493 (the zone’s center; the record gives no point)
Flash Flood, Fillmore
- When
- August 9, 8:30 PM CST to 9:45 PM CST
- Where
- Fillmore County, Rushford
- Property damage
- $25,000
- Crop damage
- $50,000
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 43.674, -92.090 (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
- Hail and Damaging Winds in Michigan, August 9 to 24, 1998
- Hail and Damaging Winds in Minnesota, August 9, 1998
- Damaging Winds and Lightning Strike in Oklahoma, August 9, 1998
- Flash Flood and Damaging Wind in Arizona, August 9, 1998
- Flash Flooding and Lightning Strike in Michigan, August 9, 1998
- Hail and Damaging Winds in Minnesota, August 9, 1998
- Hail and Damaging Winds in Wisconsin, August 9, 1998
- Tornadoes and Flash Flood in Colorado, August 9, 1998
- Lightning Strike in Florida, August 9, 1998
- Damaging Wind and Lightning Strike in Arkansas, August 9, 1998
- Damaging Winds in Oklahoma, August 9, 1998
- Damaging Wind in Florida, August 9, 1998
More
Every storm in Minnesota in 1998Every state in 1998This day in weather historyWarnings in Minnesota, 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: 5666377, 5666378, 5666379.