A fast-moving severe thunderstorm line swept through a wide arc of the eastern United States Thursday morning, with the National Weather Service holding 13 active Severe Thunderstorm Warnings across West Virginia, Virginia, New York, Oklahoma, Louisiana, and the District of Columbia.
Wind gusts of 60 mph are the confirmed primary hazard, tracked by radar across multiple warning zones simultaneously. The northern segment of the line was advancing northeast at 70 mph over Cattaraugus County in western New York — near Buffalo — as of 8:33 a.m. EDT, according to the National Weather Service in Buffalo. A separate arm crossing the West Virginia-Virginia highlands was moving east at 55 to 60 mph, threading through one of the most densely warned corridors of the outbreak.
West Virginia carries the highest concentration of active alerts, with warnings spanning Greenbrier, Fayette, Logan, McDowell, Mingo, Raleigh, Wyoming, Mercer, Pocahontas, Randolph, Webster, Hampshire, and Hardy counties. Named communities in warning areas include Lewisburg, Hinton, White Sulphur Springs, Ronceverte, and Alderson. Virginia warnings cover Alleghany, Bath, Bland, Buchanan, Frederick, Giles, Shenandoah, and Tazewell counties — with Frederick and Shenandoah counties pushing the risk zone toward the Washington, D.C., area.
Beyond the Appalachians, Grant, Kay, and Noble counties in Oklahoma are also under active Severe Thunderstorm Warnings, extending the outbreak’s footprint into the southern plains.
Across all warning areas, the National Weather Service cites consistent impacts: 60 mph winds capable of felling trees, stripping roofing and siding, and rendering roads hazardous. Torrential rainfall is occurring alongside the wind threat, and the National Weather Service warns that flash flooding is possible. Residents in warning zones are advised to move to an interior room on the lowest floor of a building; motorists should not attempt to drive through flooded roadways.
The speed of this system leaves little margin. The northern segment’s 70 mph forward motion means conditions can deteriorate within minutes of a warning issuance — the Cattaraugus County alert in New York was set to expire at 9:30 a.m. EDT, reflecting how quickly the line is advancing. Residents in the eastern portions of each affected state, including areas of Virginia approaching the DC corridor, should expect mid-morning impact before the line clears.
The National Weather Service is the authoritative source for current warning boundaries and expiration times. Any road flooding along the corridor should be treated as impassable.