Philly Weekend Weather Forecast

A blocking pattern with  high pressure over the Atlantic will allow a southerly flow of warm air to be with us over the weekend.  The same blocking pattern will impede the northern movement of tropical storm Ana, although there is always uncertainty with the movement of these systems.

A weak warm front will move through Friday night and some cloudiness will linger into Saturday morning as dew points rise.  Skies should break to sunshine in the afternoon with temps getting to 80.  It will be more humid on Saturday.

The  overall dry pattern will continue for Sunday, but some moisture from tropical storm Ana may introduce some cloudiness Sunday afternoon.  Mostly sunny with some cloudiness in the afternoon. High 83 and humid.

I just want to emphasize that tropical storm Ana affects the models and introduces some increased uncertainty in this forecast.