St Marys River at Great Mills, MD
Is St Marys River at Great Mills, MD flooding right now?
No — St Marys River at Great Mills, MD is at 1.38 ft, 5.6 ft below its 7 ft flood stage, as of 82 min ago.
Gauge height
1.38 ft
Streamflow
4 cfs
Minor flooding here begins at 7 ft, with major flooding at 10 ft. The highest crest on record was 13.34 ft on Wed, Aug 20, 1969.
Flood stages at this gauge
| Category | Stage | Current distance |
|---|---|---|
| Action | 5 ft | 3.6 ft below |
| Minor flood | 7 ft | 5.6 ft below |
| Moderate flood | 8 ft | 6.6 ft below |
| Major flood | 10 ft | 8.6 ft below |
Highest crests on record
| Stage | Date |
|---|---|
| 13.34 ft | 1969-08-20 |
| 12.98 ft | 2011-08-28 |
| 12.82 ft | 1999-09-16 |
| 12.08 ft | 1960-07-30 |
| 11.77 ft | 1955-08-13 |
Nearby gauges
| Gauge | Distance | County |
|---|---|---|
| MCINTOSH RUN NEAR LEONARDTOWN, MD | 9.3 mi | St. Mary's County |
| St Clements Creek near Clements, MD | 13.6 mi | St. Mary's County |
| ST LEONARD CREEK NEAR ST LEONARD, MD | 14.3 mi | Calvert County |
| KILLPECK CREEK AT HUNTERSVILLE, MD | 20.5 mi | St. Mary's County |
| CAT POINT CREEK NEAR MONTROSS, VA | 22.4 mi | Richmond 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.