Thorn Creek at Glenwood, IL
River level and flood forecast · Cook County
Normal2.6 ftas of Mon 3:15 PM
The river is 5.9 ft below flood stage (8.5 ft).
Flow: 25 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 6 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 12.5 ft |
| Moderate flood stage | 11 ft |
| Flood stage | 8.5 ft |
| Action stage | 7 ft |
| Record crest (July 13, 1957) | 11.14 ft |
What floods at each level
From the National Weather Service, highest first.
- 13 ftThorn Creek Basin Water Treatment Plant property threatened in Chicago Heights. A few residences are threatened near US-30 in Chicago Heights.
- 12.5 ftHalsted Street threatened at IL-1 in Chicago Heights.
- 12 ftResidences threatened along Parkside Avenue and Union Avenue in Chicago Heights. Joe Orr Road threatened in Chicago Heights.
- 11.5 ftStructures threatened at US-30 in Chicago Heights. US-30 threatened in Chicago Heights. Chicago Road threatened in Chicago Heights.
- 9.5 ftLow-lying sections of Joe Orr Woods are inundated.
- 9 ftEdgewood Avenue is threatened near US-30 in Chicago Heights.
- 7.5 ftLow-lying sections of Halsted Woods are inundated.
- 7 ftLow-lying sections of Thorn Creek Trail are inundated in Chicago Heights.
Highest crests on record
- 11.14 ft — July 13, 1957
- 11.07 ft — June 13, 1981
- 11.03 ft — June 7, 1974
- 11 ft — September 13, 2008
- 10.98 ft — December 3, 1982
Recent crests: 9.03 ft (May 17, 2020) · 7.59 ft (April 29, 2020) · 8.52 ft (January 11, 2020) · 7.5 ft (October 26, 2019) · 9.64 ft (June 27, 2019)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (GLWI2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.