Grand Calumet River above Hammond (Columbia Ave), IN
River level and flood forecast · Lake County
Normal6.0 ftas of Mon 2 PM
The river is 3.5 ft below flood stage (9.5 ft).
Flow: 47 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 | 13 ft |
| Moderate flood stage | 12 ft |
| Flood stage | 9.5 ft |
| Action stage | 8 ft |
| Record crest (December 12, 2020) | 9.32 ft |
What floods at each level
From the National Weather Service, highest first.
- 13.5 ftResidences threatened along Roosevelt Street in Hammond.
- 13 ftIndustrial structures threatened near Hohman Avenue and Hoffman Street in Hammond.
- 12 ftColumbia Avenue threatened in Hammond.
- 11 ftCalumet Avenue threatened north of the river in Hammond. Industrial parking lots threatened near Hohman Avenue and Hoffman Street in Hammond.
- 10 ftRoosevelt Street threatened at Birch Avenue in Hammond.
- 9.5 ftSanitary District of Hammond property threatened.
Highest crests on record
- 9.32 ft — December 12, 2020
Recent crests: 9.32 ft (December 12, 2020)
Up and down the river, and nearby
- Indiana Harbor Canal at East Chicago (Lake Michigan outlet), IN
- Little Calumet River at Munster, IN
- Little Calumet River at Munster (Northcote Avenue), IN
- Little Calumet River at Hammond (Indianapolis Boulevard), IN
- Little Calumet River at Highland (Kennedy Avenue), IN
- Hart Ditch at Munster, IN
- Little Calumet River at South Holland, IL
- Lansing Ditch near Lansing, IL
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (HGCI3); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.