Debris Flow in Illinois
Every debris flow event the National Weather Service has filed in Illinois, year by year, with the most significant episodes. A fast-moving slurry of mud, rock and debris, usually on a slope soaked by heavy rain or stripped by a fire.
The most significant on the map
The most significant debris flow episodes in Illinois.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The record
- Events
- 2
- Deaths
- 0
- Injuries
- 0
- Damage
- $50,000
Every year
The most significant
Ranked by deaths, injuries, damage and size together.
- Debris Flow in Illinois, July 21, 2003Heavy rain of 1.5 to 2 inches in under an hour caused a mudslide across Illinois 84 in Carroll County. The location was one third of a mile north of the Highway 84 bridge, on the northwest side of Mississippi Palisades State Park (or 0.5 miles northeast of Marcus, Illinois).
- Debris Flow in Illinois, July 21, 2003Heavy rain of just over 2 inches in two hours caused a mudslide in Moline, Illinois. The area affected was 6th and 7th streets between Railroad Avenue and 5th Avenue. The mudslide originated from the old Moline Public Hospital which was undergoing demolition.
More
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.