Flash Flood, Boone
- When
- May 28, 6:30 AM CST to 6:30 PM CST
- Where
- Boone County, Southern
- Coordinates
- 42.323, -88.823 (the zone’s center; the record gives no point)
Thunderstorms moved across Ogle and Winnebago counties during the morning on May 28th. Street flooding was reported in Rockford around 9am.
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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 LOT wrote it up.
Thunderstorms moved across Ogle and Winnebago counties during the morning on May 28th. Street flooding was reported in Rockford around 9am. Thunderstorms continued to traverse across the same areas in Ogle and Winnebago counties in the in the classic "train echo" fashion. Doppler radar estimated as much as 5 inches of rain had fallen in less than 8 hours. Many vehicles were reported stranded in the Rockford area. Residents from 11 homes in Davis Junction wer evacuated as flash flooding inundated parts of the town. Flooding closed Illinois 72 between Byron and Illinois 251. Residents of 152 trailers in Evergreen Mobile home park in Sycamore were evacuated from rising flood waters. A few residents were evacuated from their homes on Shannon Lane just west of Sycamore. Small creeks in DeKalb, Winnebago, and Boone counties quickly rose out of their banks and flooded low lying areas. As much as 2.5 inches of rain in less than one hour's time was reported in DeKalb Illinois. The heavy rainfall also caused many creeks to overflow their banks in Southern Cook county.
The Milwaukee radar (KMKX), 75 km away, was scanning. The volume nearest the first event began at 12:27 UTC.
1 flash flood. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 1996Every state in 1996This day in weather historyWarnings in Illinois, May 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: 5545150.