Today the dangerous heat is over most of the region!

 

 Side note, while we’re burning up, they had a snowstorm out west in the northern Rockies, including Idaho, Montana, and Wyoming,

Yesterday afternoon and evening saw a damaging MCS move across the northern Half of New York State. Then another MCS dropped into New York State down from Canada during the overnight into early this morning. The 2^nd MCS had a ton of lightning with it, as it slowly weakened as it dropped south and east across New York State into southern New England.

 

Looking at the current surface chart and temperature profile

We can see several troughs over the region.  These troughs and shortwaves that will be dropping through could cause thunderstorms to quickly flare up. If the cap breaks, they could become strong to severe.  

 

 

The radar image shows the MCSs in the Upper Midwest, that are going to rotate around the dome and drop into New York State later today. 

Image curtesy of Tropical Tidbits

Image courtesy of Pivotal Weather  

Today the heat dome is going to be in complete control of our weather in this region. So expect it to be hazy, hot and humid.  Air temperatures are going to be in the upper 80’s into the low 100s north to south across the region, high dewpoints are going to make feel like temperatures in the mid 90’s and well into the 100s. This is dangerous heat. If you’re going to be outside working, make sure you’re well hydrated, by drinking plenty of water. Take several heat breaks in shaded or air-conditioned areas. These conditions make it easy for anyone to have heat-related illnesses    There is also going to be the risk for scattered showers and isolated to scattered thunderstorms. As was the case yesterday, shortwaves are going to be rotating around the edge of the ridge. These are going to cause powerful MCSs to move over the Upper Midwest north of the Great Lakes across southern Canada, and then drop down into New York State into New England. There is likely going to be at least a couple of waves of these thunderstorm complexes during the day extending into the overnight. Bringing the threat of damaging winds of 70+ mph, along with heavy downpours, moderate to large hail and frequent vivid lightning.

 Images courtesy of Pivotal Weather 

Those of Y’all who are under the dome in much of Pennsylvania and the middle Atlantic region the thunderstorms will be slow moving. While the thunderstorms and complexes dropping out of Canada and the Saint Laurence Valley and moving over New York State into New England will be moving quicker.

 

Thursday will likely be even hotter than Wednesday, as the heat builds on itself, again with the risk for severe weather.

 

Image courtesy of Pivotal Weather 

 

Friday is going to see the ridge start to retrograde west and south. Temperatures will slowly start to lower across upstate New York State and northern and Central New England. But temperatures are still going to be above average. Those under the dome will likely see their temperatures as warm or warmer than Thursday. The Ridge responsible for all the heat in the east is going to start move off the southeast Coast along with a ridge building once again over the Plains and points west.

Image courtesy of Pivotal Weather 

Saturday and Sunday is going to still be very hot across southern New England. the I-95 including New York City and points south down into the Southeast. Sunday will see the heat start to back off across Connecticut, Rhode Island and New York City. But places like Washington DC, Philadelphia, Atlantic City and Western Pennsylvania including Pittsburgh will still be experiencing a lot of heat. As the dome starts to break down showers and storms including severe weather will be possible each day of the July 4th weekend for Pennsylvania and the Northern Middle Atlantic, especially on Saturday.  Sunday will see the thunderstorms become more widespread ahead of an approaching cold front, due to the clouds and rain it will be a little cooler. The cold front will be slowly moving through on Monday bringing more widespread showers and rain.  This cold front is going to break the heat, allowing for temperatures to be much cooler by Tuesday as we sit under a trough. Wednesday will see high pressure moving in from Canada.  

Stay cool and safe out there!