A fast moving storm is developing. 16 states are affected. Heavy snow could be spotted in Boston, New York City, Philadelphia, Washington, D.C., and upstate New York by early Thursday morning. Philadelphia and New York were expecting at least a half-foot of snow on Thursday and were bracing for bitter cold temperatures Thursday night. The weather service issued a blizzard warning for some coastal areas. High winds moving in on the storm’s heels could bring gusts of up to 50 mph, leading to power outages. Forecasters are predicting cold air will maintain its grip across the northern tier of the country. Meanwhile, rain, thunderstorms and severe weather will threaten to kick off farther south, leading to a volatile season for many.