A blocking pattern across the US continues to give us mostly sunny skies and cool temperatures. It’s also expected to stall the dangerous hurricane Harvey over Texas.

For Philadelphia, a large area of high pressure will drift over us on Saturday, and very slowly move east on Sunday.  Saturday will be mostly sunny and pleasant with high temp around 79.  Some cloudiness may move in late afternoon Saturday , just like today.

Saturday evening, winds will shift to an easterly flow and winds will remain from the east on Sunday.

The models are showing sunny skies for Sunday, but an easterly flow this time of year sometimes brings in more cloudiness than predicted by the models.  Confidence in the cloud cover for Sunday is below average.  Highs still expected around 79.