Flash Flood, Winnebago
- When
- June 25, 10:00 PM CST to June 26, 12:00 PM CST
- Where
- Winnebago County, North Portion
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 42.336, -89.161 (the zone’s center; the record gives no point)
Flash Flooding in Illinois, June 25 to 26, 1998
Nearly stationary thunderstorms produced heavy rainfall over northern Winnebago and Boone Counties. Radar estimatedas much as 6 to 8 inches of rain had fallen by 400 AM CST.
Where it happened
Every event with a place to put it; 2 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
- 2
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 LOT wrote it up.
Nearly stationary thunderstorms produced heavy rainfall over northern Winnebago and Boone Counties. Radar estimatedas much as 6 to 8 inches of rain had fallen by 400 AM CST. Many roads were inundated from the flood waters. The Winnebago County Sheriff closed the Rock and Kishwaukee Rivers to recreational boating due to the high water and swift current. Illinois Highway 173 between Poplar Grove and Capron in Boone County was closed because of flooding from Beaver Creek. Flooding of Willow Creek was reported in Machesney Park.
The radar
The national radar mosaic for the moment the first event began.
Event by event
2 flash flood. Local standard time, as filed.
Flash Flood, Boone
- When
- June 25, 10:00 PM CST to June 26, 12:00 PM CST
- Where
- Boone County, North Portion
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 42.323, -88.823 (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
- Heat in Pennsylvania, June 25 to 26, 1998
- Tornado and Hail in Wisconsin, June 25, 1998
- Heat in New Jersey, June 25 to 26, 1998
- Heat in Wisconsin, June 25, 1998
- Heat in Delaware, June 25 to 26, 1998
- Lightning Strike in Florida, June 25, 1998
- Flash Flood in New York, June 25 to 26, 1998
- Tornado and Hail in Michigan, June 25, 1998
- Damaging Winds in Vermont, June 25, 1998
- Damaging Winds in Wisconsin, June 25, 1998
- Hail in Idaho, June 25, 1998
- Hail and Damaging Winds in Wisconsin, June 25, 1998
More
Every storm in Illinois in 1998Every state in 1998This day in weather historyWarnings in Illinois, June 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: 5655809, 5655810.