Flash Flood, Johnson
- When
- July 20, 11:30 PM CST to July 21, 1:30 AM CST
- Where
- Johnson County, Knob Nobster
- Coordinates
- 38.744, -93.806 (the zone’s center; the record gives no point)
Flash Flood in Missouri, July 20 to 21, 1996
Thunderstorms dumped up to 3 inches of rain throughout Johnson County with as much as 5 to 7 inches of rain over the eastern half of the county. Flash flooding resulted in the closing of Routes E and 23.
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
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 EAX wrote it up.
Thunderstorms dumped up to 3 inches of rain throughout Johnson County with as much as 5 to 7 inches of rain over the eastern half of the county. Flash flooding resulted in the closing of Routes E and 23. Several roads were also reported flooded in the Knob Nobster area.
The radar
The Pleasant Hill radar (KEAX), 40 km away, was scanning. The volume nearest the first event began at 05:28 UTC.
Event by event
1 flash flood. Local standard time, as filed.
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 in South Dakota, July 20, 1996
- Strong Wind in Massachusetts, July 20, 1996
- Rip Current in Florida, July 20, 1996
- Lightning Strike in Colorado, July 20, 1996
- Lightning Strike in Alabama, July 20, 1996
- High Wind in New York, July 20, 1996
- Lightning Strike in Alabama, July 20, 1996
- Damaging Wind in Missouri, July 20, 1996
- Lightning Strike in Louisiana, July 20, 1996
- Lightning Strike in Kansas, July 20, 1996
- Flooding in Pennsylvania, July 20, 1996
- Flood in Missouri, July 20 to 25, 1996
More
Every storm in Missouri in 1996Every state in 1996This day in weather historyWarnings in Missouri, July 1996
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: 5561700.