Another day of hot and humid conditions can be expected with a heat index over 100 degrees, but an end to the hot weather pattern begins tonight with waves of showers and thunderstorms.  A few thunderstorms will be capable of reaching severe levels with flash flooding, small hail, and wind damage a threat.

 

Hazy, hot, and humid conditions will be in place today with a few isolated thunderstorms possible this afternoon.  Winds will be from the southwest at 5 to 15 mph.  Temperatures will rise into the mid-80s to lower 90s along the coast, upper 80s to mid-90s over the interior, and mid to upper 90s in the Delaware River Valley for highs.  A heat index of 95 to 105 degrees can be expected in the New York City metropolitan area and 100 to 110 in the Philadelphia metropolitan area.

 

A cold front will slowly press down towards the region this evening through tomorrow morning with widely scattered showers and thunderstorms.  A few thunderstorms will be capable of reaching severe levels with intense downpours, frequent vivid lightning, hail, and wind gusts over 60 mph.  Winds will be from the southwest at 5 to 15 mph.  Temperatures will fall into the upper 60s to lower 70s over the interior and lower to mid-70s along the coast for lows.

 

The cold front will slowly sink through the region tomorrow with waves of showers and thunderstorms.  Heavy rainfall is expected with rainfall amounts of 1" to 3" possible.  Flash flooding will be a threat.  Winds will veer from the southwest to the northwest at 5 to 15 mph.  Temperatures will rise into the mid to upper 70s over the interior, lower to mid-80s in the New York City metropolitan area, and mid to upper 80s in the Philadelphia metropolitan area for highs.

 

The cold front will sink to the south of the region on Friday with waves of showers through the early afternoon followed by scattered cloud cover with isolated showers by the late afternoon and evening hours.  Winds will be from the northwest at 5 to 15 mph.  Temperatures will range from the mid-60s to lower 70s for lows and lower to mid-70s over the interior and upper 70s to lower 80s along the coast for highs.

 

The cold front will stall over the coastal waters with waves of low pressure through the Fourth of July weekend from Saturday through Monday with scattered clouds and isolated to widely scattered showers.  Temperatures on Saturday will range from the upper 50s to mid-60s for lows and lower to mid-70s over the interior, mid to upper 70s along the coast, and upper 70s to lower 80s in the Delaware River Valley for highs.  Temperatures on Sunday will range from the mid-50s to lower 60s for lows and upper 60s to mid-70s along the coast and mid-70s to lower 80s away from the coast for highs.  Temperatures on Monday will range from the lower to mid-60s for lows and lower to mid-70s along the coast and upper 70s to lower 80s away from the coast for highs.

 

A series of weak troughs will move through the region on Tuesday and Wednesday with scattered clouds and isolated showers and thunderstorms.  Temperatures on Tuesday will range from the lower to mid-60s for lows and mid-70s to lower 80s along the coast and lower to mid-80s away from the coast for highs.  Temperatures on Wednesday will range from the mid-60s to lower 70s for lows and upper 70s to mid-80s along the coast and mid-80s to lower 90s away from the coast for highs.