Hurricane Isaias made landfall Monday night August 3rd near Ocean Isle Beach North Carolina with 85 mph winds.
- A Tropical Storm Warning is in effect for... * North of Duck North Carolina to Eastport Maine * Chesapeake Bay * Tidal Potomac River * Delaware Bay * Long Island and Long Island Sound * Martha's Vineyard, Nantucket, and Block Island
Widespread tropical-storm conditions are expected in the tropical storm warning area in the mid-Atlantic states, including portions of the Chesapeake Bay region today, with wind gusts to hurricane force possible. These winds could cause significant tree damage and power outages. Tropical storm conditions are expected to reach southern New England this afternoon and northern New England tonight.
Gale-force winds are expected to spread into southeastern Quebec tonight and Wednesday. See products issued by Environment Canada for more information.
On the forecast track, the center of Isaias will continue to move near or along the coast of the mid-Atlantic states today, and move across the northeastern United States into southern Canada tonight.
Data from Doppler weather radars along with surface observations indicate that maximum sustained winds remain near 70 mph (110 km/h) with higher gusts. Tropical-storm-force winds extend outward up to 140 miles (220 km) from the center. During the past hour, a sustained wind of 55 mph (89 km/h) and a gust to 65 mph (105 km/h) were reported by a Weatherflow site at Ocean City, Maryland. A sustained wind of 45 mph (72 km/h) and a gust to 57 mph (92 km/h) were reported at Ocean City-South Beach, New Jersey. Only gradual weakening is anticipated while Isaias moves north-northeastward near the mid-Atlantic coast today. A faster rate of weakening is expected to begin tonight, and the system is forecast to become post-tropical tonight or early Wednesday.
The combination of a dangerous storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline. The water could reach the following heights above ground somewhere in the indicated areas if the peak surge occurs at the time of high tide... - Ocracoke Inlet NC to the North Carolina/Virginia border including Pamlico Sound, Albemarle Sound, Pamlico and Neuse Rivers...1-2 ft - North of the North Carolina/Virginia border to Martha's Vineyard including the Chesapeake Bay, the Tidal Potomac River, Delaware Bay, Long Island Sound, Block Island Sound, Narragansett Bay, Buzzards Bay, & Vineyard Sound...1-3 ft
Heavy rainfall along the East Coast, near the path of Isaias, will result in flash and urban flooding, some of which may be significant in the mid-Atlantic and Northeast through tonight. Potentially life-threatening urban flooding remains possible Philadelphia, and elsewhere along and just west of the I-95 corridor today. Scattered minor to moderate river flooding is likely across portions of the Mid-Atlantic. Quick-responding rivers in the Northeast will also be susceptible to minor river flooding.
Several tornadoes are possible across northern New Jersey, Massachusetts, and southeastern New York, through southern New England, by late afternoon. A risk for tornadoes may continue across northern New England through this evening.
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