Strong Storms For Some Tomorrow Evening?

Our heat event is potent but not long lasting as relief will start to slide towards us in the form of a cool front tomorrow. This front will be a bit of a factor in the forecast over the weekend as it stalls out in the region and enhances the thunderstorm potential for Friday and Saturday before a second front comes in from the west and clears the coast late Sunday. As is the case with many summertime fronts the push of cool air is not impressive behind it but relief is relief even if the front stalls and brings thunder chances.

Since this front will cut into a hot and humid airmass the potential for thunderstorms exists tomorrow afternoon and evening. The best chances for storms to develop will be to our north and northwest and some of those storms could be strong if not severe. There is a slight risk of severe weather out for areas north of I-78 tomorrow, with the best chances of severe weather across Northern and Western Pennsylvania.

The timing may not necessarily be optimal for us to get severe weather locally as computer modeling suggests that most of the activity holds off from moving into Philadelphia until after 8 or 9 PM.   The NAM computer model depiction up above is for 5 PM tomorrow from a forecast run from earlier today, showing thunderstorms generally are in greater quantity north and west of I-78 late tomorrow afternoon.    Those storms will gradually slide into the Philadelphia region, perhaps not as strong as they will be over the Lehigh Valley or Poconos, but still enough to bring a taste of relief to the region after a flirtation with 100 degrees tomorrow afternoon.