Coastal Flood — King George, Virginia

2021-10-29 · King George, Virginia

Event narrative

Moderate coastal flooding was observed at Dahlgren, VA on the 29th with a crest of 5.64 ft MLLW at 218 PM LST. Moderate coastal flooding was also reported along the Upper Machodoc Creek. Peak inundation was 3.7 ft at Dahlgren.

Wider weather episode

A strong pressure gradient between low pressure over the Ohio Valley and strong high pressure over Quebec, CA resulted in a strong southeast onshore flow that brought the highest water levels to the Tidal Potomac River since Tropical Storm Isabel in September 2003.

Source: NOAA Storm Events Database, event_id 989798. Narrative written by the NWS forecast office that issued the report.