Major Flood
7 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
5.5 ft
Minor Flood
4 ft
Action Stage
3.5 ft
What Floods at Each Level
7.25 ft
The boardwalk near the Yacht Basin marina begins to flood.
7 ft
The east end of the parking lot at the Yacht Basin is completely covered by water. Water also covers the pier and promenade at the Concord Point Lighthouse.
6 ft
Water goes over the dock and into the parking lot at Roberts Park.
5.9 ft
Water enters the building at the Yacht Basin. The dock at Pier number 1 is also covered.
5.5 ft
Water reaches the bottom of the marina office at the Yacht Basin in Havre de Grace.
4.5 ft
Hutchins Park in Havre de Grace begins to flood.
4 ft
Water begins to go over the bulkhead at the Havre de Grace Yacht Basin in multiple locations.
3.5 ft
The lowest spot of the parking lot of the Havre de Grace Yacht Basin begins to flood.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Jan 9, 2024 | 6.93 ft | — |
| Oct 30, 2012 | 5.84 ft | — |
| Apr 30, 2020 | 5.65 ft | — |
About This Gauge
USGS Site
NWS LID
HDGM2
River
Chesapeake Bay
County
Harford, MD
Coordinates
39.5378°N, 76.0897°W
Get Flood Alerts for Chesapeake Bay
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Chesapeake Bay at Havre de Grace (IN MLLW)?
The Chesapeake Bay at Havre de Grace (IN MLLW) gauge is maintained by USGS (site 01580620) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Chesapeake Bay at Havre de Grace (IN MLLW)?
The NWS-defined flood stage for Chesapeake Bay at Havre de Grace (IN MLLW) is 4 feet. Action stage begins at 3.5 feet. Moderate flooding starts at 5.5 feet, and major flooding at 7 feet.
How do I get alerts when Chesapeake Bay rises?
Download StormCast free on Google Play, go to River Gauges, and add Chesapeake Bay at Havre de Grace (IN MLLW) to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Chesapeake Bay at Havre de Grace (IN MLLW) gauge located?
The gauge is located in Harford County, Maryland at coordinates 39.5378°N, 76.0897°W. USGS site number: 01580620. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Chesapeake Bay
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- <head> <meta charset="utf-8"> <style type="text/css"> .style1 { background-color: #FFFF00; } </style> </head> Please refer to <a href="https://forecast.weather.gov/product.php?site=NWS&issuedby=LWX&product=CFW&format=CI&version=1&glossary=1"><font color="#0000ff"><span class="style1">Coastal Flood Advisories and Warnings</span></font></a> for official water level forecasts during periods of coastal flooding. During tropical cyclones, please refer<span class="style1"> </span> <span class="style1"> <a href="https://forecast.weather.gov/product.php?site=NWS&issuedby=lwx&product=TCV&format=CI&version=1&glossary=1">here</a></span> for additional storm surge information.