The severe weather poses risks of damaging winds, large hail, and flash flooding across multiple states. On Saturday, the Northeast and southeastern Great Lakes face the highest threat, with intense storms expected to bring damaging wind gusts and frequent lightning. A few tornadoes are also possible. Flash flooding could impact urban areas, particularly in New York City, Pennsylvania, and New Jersey, where heavy rainfall is forecast. On Sunday, the risk of severe storms and flooding extends to parts of Virginia and North Carolina, potentially disrupting travel and outdoor activities.