Mississippi River at Grafton, IL
Is Mississippi River at Grafton, IL flooding right now?
Mississippi River at Grafton, IL measured 15.49 ft on 2026-09-22 21:00:00 UTC. That observation was 4.5 ft below its 20 ft flood stage. This is the latest available reading, not a guarantee of current conditions.
Gauge height
15.49 ft
Streamflow
88,500 cfs
Minor flooding here begins at 20 ft, with major flooding at 29 ft. The highest crest on record was 38.17 ft on Sun, Aug 1, 1993.
Flood forecast
Flood stages at this gauge
| Category | Stage | Current distance |
|---|---|---|
| Action | 18 ft | 2.5 ft below |
| Minor flood | 20 ft | 4.5 ft below |
| Moderate flood | 24 ft | 8.5 ft below |
| Major flood | 29 ft | 13.5 ft below |
Highest crests on record
| Stage | Date |
|---|---|
| 38.17 ft | 1993-08-01 |
| 35.17 ft | 2019-06-07 |
| 33.12 ft | 1973-04-28 |
| 32.13 ft | 1844-06-18 |
| 32.1 ft | 2019-05-07 |
Last 7 days
Nearby gauges
| Gauge | Distance | County |
|---|---|---|
| Piasa Creek near Melville, IL | 8.5 mi | Madison County |
| Mill Creek near Florissant, MO | 11.2 mi | St. Louis County |
| Missouri River at St. Charles, MO | 12.7 mi | St. Louis County |
| Cowmire Creek at Bridgeton, MO | 14.1 mi | St. Louis County |
| Coldwater Creek near Black Jack, MO | 14.1 mi | St. Louis County |
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Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.