Deadly severe weather that spawned tornadoes and dust storms across the Midwest and South arrived on the East Coast on Sunday, bringing with it powerful winds and the potential for tornadoes across the Mid-Atlantic and the Southeast.
The turbulent weather, which has killed a total of at least 40 people, has caused widespread destruction.
It is part of a huge cross-country system that dropped hail — some as large as baseballs — and produced tornadoes Friday and Saturday that killed at least 24 people. The system also caused wildfires driven by hurricane-force winds, and dust storms that led to crashes that killed at least 16 people in Kansas, Oklahoma and the Texas Panhandle.
On Sunday, the threat of tornadoes and thunderstorms shifted east, though at a level much lower than it was on Saturday.
A complex of storms that was over Alabama, Mississippi and parts of Tennessee on Saturday moved into northern Florida, Georgia, South Carolina and a portion of North Carolina on Sunday morning.
The biggest concern for the Mid-Atlantic, from Virginia to New Jersey, was strong, damaging winds, but there was also a risk of a few brief tornadoes.
By late Sunday afternoon, parts of Delaware, New Jersey, Pennsylvania, New York, Maryland, Virginia and Washington were under tornado watches and wind advisories. The Weather Service also warned of winds up to 55 miles per hour in Central Florida until 4 a.m. on Monday.
A ground stop was issued at the airport in Tampa, Fla., on Sunday because of the severe storms, according to the Federal Aviation Administration.
According to FlightAware, a company that tracks flights, more than 100 flights were canceled at the Orlando, Fla., airport during the busiest weekend of spring break travel.
There were also flight delays at airports in Washington, New York and Philadelphia because of the weather system, according to the F.A.A.
Forecasters said there was a slight risk of severe storms and tornadoes from Central Florida to western Pennsylvania. However, a higher enhanced risk was in place for western and central Pennsylvania, where more than 100,000 power outages were reported on Sunday.
In central Pennsylvania, Denys Khrulov, a senior meteorology student at Penn State, said that the storm whipped through campus on Sunday afternoon, bringing high winds, pea-sized hail and rain that brought down trees and power lines.
Mr. Khrulov and other meteorology students watched the weather from a parking garage.
“I think this is definitely the most intense storm I’ve seen here personally,” Mr. Khrulov said.
The heaviest rainfall on Sunday was expected along the East Coast from South Carolina up to Massachusetts, with about one to two inches of rain possible.
A few locations in this area could record up to five inches, particularly in eastern Virginia and eastern North Carolina. New York City could record one to two inches of rain, depending on where thunderstorms are oriented.
This large storm system is expected to move offshore on Monday.
Rich Otto, a meteorologist with the National Weather Service’s Weather Prediction Center, said there was likely to be a break from the extreme and tempestuous weather for “at least a few to several days” but the overall pattern suggests that more storms will move across the country before the end of March.
“This is probably not the last time we’ll talk about severe thunderstorms in the next several weeks,” he said.
Yan Zhuang, Sara Ruberg and Nazaneen Ghaffar contributed reporting.