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As of 9:50 p.m. EDT Tuesday, this story is no longer being updated. For a recap on Tuesday's severe weather, click here.
Severe thunderstorms with damaging winds, hail and isolated tornadoes are threatening residents from the central Appalachians to the Atlantic Coast into early Tuesday night.
Frequent lightning strikes, blinding downpours and isolated flash flooding are also likely. Expect sporadic power outages and downed trees with these storms.
The area at greatest risk for an isolated tornado extends from northeastern Pennsylvania to western Massachusetts and central Connecticut.
Major cities that are projected to be impacted include Philadelphia; New York City; Washington, D.C.; Baltimore; Boston; Wilmington, Delaware; Atlantic City, New Jersey; and Hartford, Connecticut.
9:30 p.m. EDT Tuesday:
A State of Emergency has been declared in part of New York following today's severe thunderstorm. Members of the New York National Guard will help with recovery operations.
I’m declaring a State of Emergency in Putnam, Dutchess, Orange and Sullivan counties as they recover from severe thunderstorms, and deploying members of the New York National Guard to assist with recovery operations.— Andrew Cuomo (@NYGovCuomo) May 16, 2018
8:50 p.m. EDT Tuesday:
A flash flood emergency has been issued in Frederick, Maryland, after severe thunderstorms stalled over the city. Several roads are closed across the city due to flooding with emergency crews conducting water rescues.
This is a particularly dangerous situation. People should seek higher ground and avoid all flooded areas.
Flash Flood Emergency for Frederick County including the city of Frederick and Braddock Heights until 11:45pm. At 838 pm EDT Emergency Management officials reported severe flooding with multiple water rescues across the area. Flash flooding is already occurring.— NWS DC/Baltimore (@NWS_BaltWash) May 16, 2018
7:35 p.m. EDT Tuesday:
Cleanup is underway across much of the Northeast after severe storms brought widespread wind damage to the region.
Downed trees have led to many road closures across the region. Some roads may remain closed into Wednesday in some of the hardest-hit areas as crews work to clear the roads.
Thunderstorms, rain & high winds are making driving conditions difficult. Many roads are closed because of downed trees. Use caution and check https://t.co/0mKMQSU4hp for real-time updates— NJDOT (@NJDOT_info) May 15, 2018
**College View Drive Road Closure(5/15/18)**— Hackettstown Police (@HackettstownPD) May 15, 2018
College View Dr is closed between Kenneth Ln and Seymour Rd due to a downed tree on wires and a snapped utility pole. pic.twitter.com/P0ozlRg5BJ
7:06 p.m. EDT Tuesday:
Most of the storms have ended across the Northeast with the exception of a line of storms situated between Philadelphia and Baltimore. This line of severe thunderstorms will advance southward over the next several hours, bringing gusty winds, hail and torrential downpours.
6 p.m. EDT Tuesday:
Over 556,000 electric customers are without power across New York, Pennsylvania, New Jersey and Connecticut as severe storms continue to bring damaging winds to the region.
A line of gusty thunderstorms is currently approaching Philadelphia and may lead to travel delays around the city.
5:45 p.m. EDT Tuesday:
Ominous clouds rolled through New York City before the arrival of gusty thunderstorms. Some of the wind gusts brought down tree limbs and caused property damage around the city.
5:10 p.m. EDT Tuesday:
A line of severe thunderstorms is approaching New York City with damaging winds and may bring disruptions to the evening commute. Ground stops at airports around the city may lead to flight delays and possibly flight cancellations through the evening.
4:45 p.m. EDT Tuesday:
Damaging winds have been common with many of the thunderstorms from eastern Pennsylvania to Massachusetts with dozens of reports of downed trees. Strong winds caused a tractor trailer to fall on its side near Danville, Pennsylvania.
A wind gust of 78 mph was reported near Beacon, New York, when a tornado-warned thunderstorm moved through the area.
Power outages have also climbed over 132,000 in Pennsylvania and 73,000 in New York with more outages likely as storms continue to impact the Northeast.
4:17 p.m. EDT Tuesday:
A severe thunderstorm capable of producing a tornado is approaching Harrisburg, Pennsylvania. People in and around the city should seek shelter immediately and remain there until the storms have passed.
Tornado Warning including Harrisburg PA, Hershey PA, Colonial Park PA until 4:45 PM EDT pic.twitter.com/SkO7dsYF3J— NWS State College (@NWSStateCollege) May 15, 2018
3:58 p.m. EDT Tuesday:
Nearly 70,000 electric customers are without power across Pennsylvania as damaging storms continue to track across the state. Over 90 percent of all electric customers in Cameron County are without power, according to First Energy.
3:47 p.m. EDT Tuesday:
A severe thunderstorm capable of producing a tornado is approaching Winsted, Connecticut, and is tracking east. Winsted is located to the northwest of Hartfod, Connecticut.
3:35 p.m. EDT Tuesday:
A trained spotter has reported a tornado near Yulan, New York. This storm is moving east and is still capable of producing a tornado.
3:10 p.m. EDT Tuesday:
Hail as large as baseballs has been reported near Saugerties, New York, after a tornado-warned thunderstorm moved through the area.
Meanwhile, a line of damaging storms is advancing across eastern Pennsylvania with hail and wind gusts over 50 mph. Several thunderstorms embedded in this line are also capable of spinning up tornadoes.
2:00 p.m. EDT Tuesday:
A NWS spotter reports that trees are down in Elk and Clarion counties in Pennsylvania.
According to another NWS spotter, 1-inch-diameter hail has been reported in Jefferson and Butler counties in Pennsylvania.
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