Humidity and thunderstorms return!

Surface chart and radar 

High pressure is still influencing our weather today, but it’s starting to drift east and off the coast.  We have a stationary boundary just south of the Mason Dixon Line, this is going to move north as a warm front. Yesterday was comfortable; but today is going to see dew points and temperatures start to climb.  The heat won’t be as oppressive as it was last week, but it is still going to be hot and muggy. There are a few showers and thunderstorms developing ahead of the front over Pennsylvania and northern Middle Atlantic.

As the warm front advances today, we’ll see scattered showers and thunderstorms develop. Some of these thunderstorms could become strong with a chance for isolated severe. The danger will be gusty winds, hail, frequent lightning. The biggest danger will be heavy downpours. With the tropical nature of the atmosphere, these storms pose a risk for some flooding, especially where we see training thunderstorms (storms that follow the same track) Those with the greatest danger of this will be across Maryland into Delaware, New Jersey and southeast Pennsylvania. The NWS has a flood watch in this area.  The chance for rain and thunderstorms will continue tonight and during the overnight.

 

The SPC has a Slight Risk for severe weather over parts of the northern Middle Atlantic. There is also a Marginal Risk for severe storms across northern New York State and northern New England

 

There is a cold front approaching out of Canada. This will be dropping out of the northwest tonight and tomorrow. As this moves through tomorrow, there will be the chance for scattered showers and isolated thunderstorms during the afternoon and evening. Widespread severe weather is unlikely, but there is the chance for isolated strong to perhaps severe thunderstorms.  These stronger storms will be capable of gusty winds, downpours and frequent lightning.

 Tomorrow night the front will stall out. Behind the front temperatures and humidity return to seasonal levels. There will be a chance for rain showers and maybe some thunderstorms across southern Pennsylvania into the Middle Atlantic, while the rest of the region dries out. For Saturday as the cold front continues to settle to our south, most of the region should be dry as high pressure presses into the region. But the farther south you are the better your chance of seeing an isolated showers. Sunday will see the high pressure in complete control. Sunday will continue to see seasonal conditions, and it looks to be mostly sunny and dry.

 The nice weather looks to carry into Monday into Tuesday as the seasonably warm temperatures hang around.  Tuesday will see the high pressure start to drift east; this will allow the temperatures to start to climb. Wednesday is looking to be hot and humid, with the chance for isolated showers and thunderstorms.  Thursday is looking to be a rinse and repeat.

 Have a great day!