A Storm Warning is in effect for Atlantic waters off the Mid-Atlantic coast, with north to northeast winds up to 55 knots and seas up to 27 feet, as a nor’easter churns offshore.
Coastal Flood Advisories cover parts of New Jersey, Delaware, Maryland and Virginia.
Another round of high tides is expected Wednesday evening.
A knot is about 1.15 mph, so 55 knots is roughly 63 mph.
Storm Warning Offshore
The NWS Ocean Prediction Center has a Storm Warning for waters from Baltimore Canyon out to 250 nautical miles offshore.
Baltimore Canyon to 69W, south of 38.5N: north to northeast winds of 40 to 55 knots tonight, with seas of 14 to 26 feet.
Wednesday brings winds of 40 to 50 knots and seas of 14 to 27 feet.
Showers and thunderstorms are possible, then rain.
Baltimore Canyon to Hatteras Canyon, 100 to 250 nautical miles out: north winds of 40 to 50 knots tonight, with seas of 15 to 25 feet.
Wednesday seas build to 14 to 26 feet.
Conditions ease Thursday, with winds dropping to 20 to 35 knots and seas of 11 to 20 feet.
By Friday, winds are 15 to 25 knots and seas 8 to 11 feet.
New Jersey and Delaware
NWS Mount Holly has Coastal Flood Advisories for the Jersey Shore and Delaware.
New Jersey: Ocean, Atlantic, Cape May and Southeastern Burlington counties.
Delaware: Kent, Inland Sussex and the Delaware Beaches.
These run until 10 p.m. EDT Wednesday.
Up to one foot of water above ground level is expected in low-lying areas near shorelines and tidal waterways.
Delaware Bay and River: New Castle County, Delaware, and Salem County, New Jersey, from 6 p.m. to 10 p.m. EDT Wednesday.
Cumberland County, New Jersey: up to half a foot, from 4 p.m. to 10 p.m. Wednesday.
Some roads may close, especially in coastal and bayside communities.
Higher tides will continue beyond Wednesday evening.
Low-end moderate tidal flooding is possible with Wednesday evening’s high tide, especially in the back bays.
Forecast tides at Atlantic City peak around 6.8 feet Wednesday afternoon, just under the 7.0-foot moderate level.
Maryland and Virginia
NWS Wakefield has Coastal Flood Advisories for the lower Maryland and Virginia shores.
Worcester County, Maryland and the Maryland Beaches, plus Accomack and Northampton counties in Virginia, run until 10 a.m. EDT Thursday.
Westmoreland, Northumberland, Lancaster, Middlesex and Mathews counties in Virginia run until 3 p.m. EDT Thursday.
Up to one foot of water is expected in low-lying areas.
The Maryland Beaches, Accomack and Northampton also have a High Surf Advisory until 7 a.m. Thursday.
Breaking waves of 7 to 10 feet are expected in the surf zone, with dangerous swimming and beach erosion.
Moderate flooding is possible at high tides Wednesday night and Thursday in spots such as Ocean City Inlet, Windmill Point, Lewisetta and Tangier Island.
How to Stay Safe
Mariners should stay in port or alter course.
Do not drive through flood waters. They may be deeper than they look.
Do not leave your vehicle where tidal flooding is likely.
Inexperienced swimmers should stay out of the water where surf is high.
Local forecasts and alerts: NWS Mount Holly and NWS Wakefield.
Tide gauge levels: National Water Prediction Service.
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