The pattern responsible for sparse severe thunderstorm activity and heavy rainfall the past few days will energize and increase the risk to lives and property across the northeastern United States this weekend.
Those sweltering in recent days from blazing sunshine, heat and high humidity will get relief but at a price.
Motorists and those spending time outdoors should be on the lookout for rapidly changing weather conditions. Airline passengers are likely to face delays as storms approach their departure, arrival or connection hubs.
A couple of storm systems will roll eastward from the Midwest this weekend. These storms will tap the high level of moisture in the region as well as a north-south temperature contrast.
Areas from Cincinnati to Pittsburgh; Morgantown, West Virginia; Philadelphia; Washington, D.C.; Atlantic City, New Jersey; and close to New York City will be at greatest risk for this dangerous and disruptive storms into Saturday evening. In some cases, a single thunderstorm can lead to flooding. In others, the cumulative effect of multiple rounds of storms can lead to high water.
Some communities will be hit with severe thunderstorms containing high winds, hail, torrential downpours and frequent lightning strikes. Isolated tornadoes cannot be ruled out in some of these areas. Be sure to stay weather ready.