This past week, we had a storm event, wasn’t a big severe weather or tornado outbreak that was being suggested by other sources for Northeast and Mid-Atlantic regions. But there were some severe thunderstorms for a parts of the area. These are base velocity radar images from thunderstorms that hit Long Beach and and Jones Beach in Long Island, New York. These storms produced wind gusts up to 60mph near Point Lookout, knocking down trees over parts Nassau and Suffolk Counties. Heavy rainfall from these t-storms also caused localized flash flooding.

It’s not a relative common occurrence, for severe thunderstorms on Long Island. As the marine layer from a wind direction off the ocean waters, tends to cause thunderstorms to collapse as they approach the coast. However, on Tuesday a cap was present and winds were out southwest direction (over more land). Which allowed more instability to develop, with some sunshine. The  sounding below, is from a balloon launch Tuesday evening, from the National Weather Service office in Upton, NY showed 2009 J/kg of MLCAPE (mixed-layer cape). That is high amount of buoyancy in the lowest 100mb layer for this area. This instability also was juxtaposed with 31kts of 0-6km shear and 29kts of 0-1km shear. Which contributed to more organized and stronger updrafts and downdrafts in thunderstorms.