DISCUSSION: As a long cold front pushed through the greater tri-state area this evening, there was quite a robust atmospheric response to the particularly hot temperatures and respectively high dew points in place through the course of the day. This response was in the form of a fairly organized line of very intense thunderstorms which initially starting developing and then quickly strengthened just to the west of Manhattan earlier this afternoon. As daytime heating continue to destabilize the lowest parts of the atmosphere across the tri-state area towards the early to middle part of the afternoon, the atmosphere quickly became primed for strong thunderstorm activity. As the nearby air parcels were lifted in the vicinity of the approaching cold front, they were lifted and destabilized which quickly resulted in the development of the aforementioned intense thunderstorm line.
More specifically, the air parcels were lifted by an atmospheric mechanism which is scientifically referred to as the "pre-frontal trough" which is the atmospheric feature that precedes the passage of a cold front and is most often affiliated with the generation of strong convective storms during the late Spring to early Fall-time period out ahead of approaching cold fronts. As seen in the video attached below (courtest of ABC7 News based in New York, New York), you can clearly see how quickly this portion of the thunderstorm line raced through Manhattan before impacting Western and Central Nassau County on Long Island before quickly dissipating due to the thunderstorm line ingesting the more stable air associated with the marine layer tied to the nearby Atlantic Ocean. To learn more about other high-impact weather events from across all of North America, be sure to click here!