The roller coaster ride begins as we will be seeing temperatures rise over the next 48 hours. Wednesday afternoon much of the area will be sitting in the 70s with records highs getting shattered. Low pressure over the Eastern Great Lakes and its associated strong cold front will then trigger off another round of severe thunderstorms for much of the Middle Atlantic and Southern areas of the Northeast which include NYC, Hudson Valley, Long Island, New Jersey & Pennsylvania. This will be the second widespread outbreak in 4 days and very rare for this early in the severe storms season.
The leading edge of that warm air is arriving now aloft in the form of clouds and they will be with us tonight with temperatures not falling very far. Most lows will be in the upper 30s and lower 40s. Then as the winds begin to go south and then southwest on Tuesday look for more clouds and rising temperatures through the 50s and into the 60s in some places. Tuesday evening when the warm front moves through, there will be some downpours and perhaps even a few thunderstorms in the mix. Then in comes the very warm air and the setup for severe weather late Wednesday into Wednesday night. Not much will happen on Wednesday as we will have clouds and some sunshine. Less of a marine influence could mean that even coastal areas may see some strong thunderstorms this time around.