Leonardtown, MD –The St. Mary’s County Department of Emergency Services, in coordination with the National Weather Service (NWS) in Sterling, Virginia, has designated new minor flood levels.

On or aboutMay 15, the defined minor flood level will change at tide gauges covering Anne Arundel, Calvert, and Saint Mary’s counties in Maryland. For reference, the National Weather Service defines minor flooding as“minimal or no property damage, but possibly some public threat (e.g., inundation of roads).After analysis and discussion with local officials, it has been determined that, while water may be observed on land at the current minor flood levels, no public threat occurs. As a result, the minor flood level is being raised by a few inches at these locations to a level more likely to cause an impact/inconvenience to people. The change also ensures the issuance of a Coastal Flood Advisory occurs with reasonably consistent impact at each sensitive location throughout the Baltimore/Washington area of responsibility.

The following table outlines the intended changes:

Minor Flood Level Changes –May 15, 2018
Based on Mean Lower Low Water (MLLW) datum
LocationCurrent Minor LevelNew Minor Level
Straits Point, MD (SGSM2)

St. George’s Island

2.7 ft. MLLW3.0 ft. MLLW
North Beach, MD (NBCM2)2.75 ft. MLLW3.0 ft. MLLW
Solomons Island, MD (SLIM2)2.75 ft. MLLW3.0 ft. MLLW
Annapolis, MD (APAM2)2.4 ft. MLLW2.6 ft. MLLW

If a Coastal Flood Advisory is in effect onMay 15, based on the current criteria level, the implementation of the new, higher, criteria will be delayed until after the advisory-level event is over.