Flash Flood, Lafayette
- When
- July 18, 1:00 AM CST to 4:00 AM CST
- Where
- Lafayette County, Blanchardville
- Property damage
- $480,000
- Crop damage
- $100,000
- Coordinates
- 42.661, -90.132 (the zone’s center; the record gives no point)
Flash flooding occurred in the villages of Blanchardville and Argyle due to rainfalls of 6 to 7 inches within a 4 to 5 hour period. These rains were the result of thunderstorms developing in Lafayette and Iowa counties, and then training ESE into the Blanchardville area.
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.
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.
The episode as NWS MKX wrote it up.
Flash flooding occurred in the villages of Blanchardville and Argyle due to rainfalls of 6 to 7 inches within a 4 to 5 hour period. These rains were the result of thunderstorms developing in Lafayette and Iowa counties, and then training ESE into the Blanchardville area. In Blanchardville a bridge was washed out, and two roads under construction sustained major damage to their curb and gutter segments. Just east of Argyle, on Highway 81, a 200 foot section of the highway's gravel shoulder was washed away by flood waters. Rural farm land, especially along the east branch of the Pecatonica River in eastern Lafayette county, also sustained some soil and crop damage. In Blanchardville, the east branch of the Pecatonica River crested at 14.47 feet at 2245CST on the 18th, or 3.47 feet above flood stage. At this location the river exceed flood stage at 0300CST on the 18th and finally went below flood stage at 2045CST on July 19th.
The Quad Cities radar (KDVN), 122 km away, was scanning. The volume nearest the first event began at 06:57 UTC.
1 flash flood. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 1996Every state in 1996This day in weather historyWarnings in Wisconsin, July 1996
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: 5558498.