Waves of thunderstorms can be expected through tomorrow as a cooler weather pattern returns to the region with an onshore flow developing.

 

A cold front will approach the region today along with a trough of low pressure that will produce scattered showers and strong to severe thunderstorms this afternoon and evening.  The thunderstorms will be capable of intense downpours, frequent lightning, hail, and wind gusts over 40 mph.  Localized flash flooding will be a threat.  Winds will be from the southwest at 5 to 15 mph.  Temperatures will rise into the mid-70s to lower 80s along the coast, upper 70s to mid-80s over the interior, and mid to upper 80s in the Delaware River Valley for highs.

 

The cold front will slowly drop through the region tomorrow with waves of showers and thunderstorms.  The thunderstorms will be capable of producing wind damage and flash flooding.  Winds will veer to the northwest at 5 to 15 mph.  Temperatures will range from the upper 60s to lower 70s for lows and lower to mid-80s for highs.

 

The cold front will stall to the south of the region on Thursday with scattered to broken cloud cover along with drizzle and isolated to widely scattered showers.  Winds will veer to the northeast at 5 to 15 mph.  Temperatures will range from the mid-60s to lower 70s for lows and upper 70s to mid-80s for highs.

 

High pressure in the Gulf of Maine and the cold front boundary stalled to the south with waves of low pressure will continue to produce an easterly to a northeasterly onshore wind with scattered to overcast cloud cover and isolated to widely scattered showers for Friday through Tuesday.  Temperatures through the period will range from the upper 50s to the mid-60s for lows and upper 60s to mid-70s for highs over the interior and New York City metropolitan area and mid to upper 60s for lows and upper 70s to mid-80s for highs in the Philadelphia metropolitan area and southern New Jersey.