The National Weather Service warning is in effect until 5:15 p.m. A thunderstorm watch is in effect until 10 p.m.
The National Weather Service issued a severe thunderstorm warning for Sunday in the Lehigh Valley.
The warning is in effect until 5:15 p.m., and includes the Allentown, Bethlehem and Easton areas. A severe thunderstorm watch for eastern Pennsylvania and northwestern New Jersey is in effect until 10 p.m.
Storm clouds form over the Fullerton Fair in the Whitehall Township area shortly before 5 p.m. Sunday. A severe thunderstorm warning is in place for the Lehigh Valley. (Mike Nester | lehighvalleylive.com contributor) See the full list of affected counties here.
A line of strong thunderstorms was bringing torrential rain, the weather service said, with the potential of localized flooding and wind gusts up to 40 mph.
AccuWeather reported the storms would be "volatile," and that the rapidly changing weather could affect an area that stretches from New York City to Columbia, South Carolina.
While Sunday night's weather is expected to be filled with rain, the weather service forecasts a clear and mostly sunny day on Monday, with a high of 82 degrees.
Never attempt to cross water-covered roadways, and obey barricades meant to protect you. Turn around, don't drown!https://t.co/isFOgtbT2B
-- NWS (@NWS) June 4, 2016
Sarah Cassi may be reached at scassi@lehighvalleylive.com. Follow her on Twitter @SarahCassi. Find lehighvalleylive.com on Facebook.