Hottest Day of the Summer So Far, Severe Thunderstorm Risk Saturday Followed By Lower Humidity Cooler Temperatures

Hottest Day of the Summer So Far, Severe Thunderstorm Risk Saturday

Followed By Lower Humidity Cooler Temperatures

Hottest Day of the Summer So Far, Severe Thunderstorm Risk Saturday

Followed By Lower Humidity Cooler Temperatures

Today looks to be the hottest day of the summer so far. We have a slew of Heat Advisories and Excessive Heat warnings to remind us all that it is summer, it is hot, it is humid! For many areas this will be the 3r day of 90 plus heat and the second day of 95 plus heat which is tame by heatwave standards. Sunshine will be around most of the day other than whatever morning fog is around in some places. Highs will reach the middle to upper 90s in many inland locations.

You probably won’t find much relief at the shore as a west wind will keep the sea breeze from coming inland except maybe right on the beach at self late in the afternoon and evening. Meanwhile today will be a mostly thunderstorm free day as we lack any mechanism to set off nothing more that isolated pop up thunderstorms that should come and go quickly if they develop at all.

SATELLITE WITH LIGHTNING STRIKES

WEATHER RADAR

Another very warm and humid night lies ahead with most lows in the 70s except for 60s well inland. Saturday will be the last day of the hot weather ending the 90 degree streak at 4 days for most places. An important cold front will be approaching and it will not only end the heat but it will usher in a 4 day period of below average temperatures as well as low humidity.

Above is a loop of the dew point temperatures beginning Sunday and lasting through Wednesday. The lower the dew point from the actual air temperature, the drier the air is. Typically in the summer if you have highs near 90 you need dew points in the 50s to feel comfortable. In general dew points of 60 or less is comfortable for most people. We will see 50s dew points slowly return Sunday but they really take hold in the Northeast and Middle Atlantic states Monday through at least Wednesday.

Before we get to that dry air mass we need to get through Saturday which will be another hot day. Highs will reach the low to middle 90s with sunshine into the afternoon and very high humidity. This should set off thundertorms and the Storm Prediction Center is indicating a slight risk (15%) chance for clusters of severe thundertorms to develop from Southern New England to the Mid Atlantic states.

The best chance for thunderstorms will be in the afternoon and evening Saturday. The front will drop southward and this should allow cooler and slightly less humid air to begin moving into the Northeast and Mid Atlantic Sunday though the process will be a bit of a slow one. The front may temporarily get hung up along the coast as they like to do bringing showers and thunderstorms early Sunday morning to areas along the coast as a wave of low pressure goes by.

Clouds will give way to sunshine as we move through the day Sunday from north to south with highs reaching the low and middle 80s. Monday we will see the dew points drop a bit more. as high pressure begins to build in from the Great Lakes. We could see some scattered showers early Monday morning as another surge of dry air arrives otherwise much of the time it will be dry.

Monday Tuesday and Wednesday high temperatures in Eastern Pennsylvania to Southern New England will range from the upper 70s to lower 80s in most places. Nighttime lows will be in the 60s. Most importantly the humidity levels will be very low through at least Wednesday and possibly even into early Thursday before we start to deal with what looks likel a vigorous cold front late next week.

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MANY THANKS TO TROPICAL TIDBITS FOR THE USE OF MAPS

Please note that with regards to any severe weather,  tropical storms, or hurricanes, should a storm be threatening, please consult your local National Weather Service office or your local government officials about what action you should be taking to protect life and property.