St. Marys River at Great Mills
Flood levels
Official flood levels at this gauge: action stage begins at 5.0 ft; minor flooding begins at 7.0 ft; moderate flooding begins at 8.0 ft; major flooding begins at 10.0 ft.
| Action stage | 5.0 ft |
|---|---|
| Minor flooding | 7.0 ft |
| Moderate flooding | 8.0 ft |
| Major flooding | 10.0 ft |
Highest recorded crests
- 13.3 ft on Aug 20, 1969 (historic crest)
- 13.0 ft on Aug 28, 2011 (historic crest)
- 12.8 ft on Sep 16, 1999 (historic crest)
- 12.1 ft on Jul 30, 1960 (historic crest)
What the water does
National Weather Service impact statements for this gauge, in the Weather Service's own words.
| 7.0 ft | Flat Iron Road begins to flood with water in some yards in Great Mills. |
|---|---|
| 8.0 ft | Indian Bridge Road begins to flood as flooding becomes more widespread in Great Mills. |
| 10.0 ft | Widespread flooding is occurring in Great Mills with water approaching homes and businesses. |
Forecast office: NWS Sterling · River Forecast Center: Middle Atlantic River Forecast Center.
St. Marys River at Great Mills in your pocket
Tidora puts this spot on your Home Screen and Lock Screen with free widgets, and sends free flood alerts before the water reaches the levels that matter to you. No account, no subscription needed for either.
Download Tidora on the App Store
Tidora is preparing for launch; these pages go fully live when the app ships.
Nearby stations and gauges
- Solomons Island NOAA tide station · 5.9 mi
- Patuxent River at Solomons Island (IN MLLW) NWS gauge · 6.1 mi
- St. George Creek at Straits Point (IN MLLW) NWS gauge · 7.1 mi
- Piney Point NOAA tide station · 7.7 mi
- Ragged Point NOAA tide station · 9.1 mi
- McIntosh Run near Leonardtown NWS gauge · 9.3 mi