As a cold front sinks south this morning over the Philadelphia and New York City metropolitan areas, high pressure will take hold from the eastern Great Lakes. This high pressure system will provide clear skies today with a drop in humidity. However, temperatures will rise into the upper 80's to lower 90's along the coast and mid to upper 90's away from the coast. There is a chance that a few locations could touch 100 degrees this afternoon, especially in the Philadelphia metropolitan area.
This evening and tonight, a few isolated thunderstorms will be possible as a few disturbances move through the region. These thunderstorms will be capable of frequent lightning, heavy downpours, large hail, and wind gusts over 50 mph. Otherwise, hazy conditions are expected with fog developing towards morning. Temperatures will fall into the upper 60's to mid 70's for lows by tomorrow morning.
Hazy, hot, humid, and at times stormy weather conditions can be expected tomorrow on through Sunday. Hazy conditions with high levels of humidity will lead to dangerously hot conditions as the heat index pushes into the mid 90's to the mid 100's. Meanwhile, isolated thunderstorms will be capable of heavy downpours, frequent lightning, large hail, and wind gusts over 50 mph. Temperatures will range from the upper 60's to mid 70's for lows and upper 80's to mid 90's along the coast and mid to upper 90's away from the coast.
A cold front will move through the region on Monday with scattered showers and thunderstorms. A much cooler air mass will take hold by Monday afternoon as high pressure builds into the region. High pressure will remain in control through Wednesday with comfortable weather conditions. Temperatures will range from the upper 50's to mid 60's for lows and lower to mid 80's along the coast and mid to upper 80's away from the coast for highs.