A strong  southwesterly flow of hot, tropically humid air will remain over our area this weekend.

The models have not been doing a stellar job in predicting the placement or timing of showers or thunderstorms that develop in the  unstable atmosphere.   The thunderstorms over the past week have been developing principally in areas of low level moisture convergence, a parameter difficult to predict in advance.

The pattern will be very hot and humid both Saturday and Sunday.  Temperatures in the mid 90s with dew points in the mid 70s will make for oppressively hot conditions.

Regarding thunderstorms, most of the activity is still predicted to occur far north and far west of Philadelphia, but the models show scattered storms developing near PHL late afternoon and evening both Saturday and Sunday.  Too difficult to predict in advance– I’ll update Saturday and Sunday mornings as to the best guess for thunderstorm development.