National Weather Service
Radar image of the United States at 5:44 p.m. ET.
Severe thunderstorms are moving east, this hour. As the National Weather Service's Storm Prediction Center says, parts of the Ohio Valley and interior southern New England can expect some wild weather this evening, including "widespread damaging winds."
Bloomberg reports that the line of storms may end up forming a "derecho." If you remember, that was a word many from Ohio through the mid-Atlantic had to learn last month, when the storm left millions without power.
As Mark explained, a derecho is "is a widespread, long-lived wind storm that is associated with a band of rapidly moving showers or thunderstorms" with wind gusts of at least 58 mph.
The National Weather Service says those most likely to affected today are:
Northern, central and western New Jersey
Southeastern New York
Central and southern Ohio
Much of Pennsylvania
Northern West Virginia
Weather.com, which is live blogging the severe weather, says New York City can expect strong storms around 7:30 p.m. ET.
Update at 8:27 p.m. ET. The Impact Begins:
Bloomberg says hundreds of flights have been canceled and almost 300,000 customers lost power in New York, Pennsylvania and Ohio by 7 p.m. local time. Reports of hail, wind and downed power lines and trees are coming in to the Storm Prediction Center. Along with its live blog, Weather.com is aggregating pictures and tweets on the storm and its damage with Storify.