Summer Weather Expected this Weekend- Philadelphia

GFS Surface Map Prediction for Saturday Afternoon
GFS Surface Map Prediction for Saturday Afternoon

A classic Bermuda high pressure system will finally establish itself this coming weekend, giving us seasonably warm (comparatively hot) weather for both Saturday and Sunday.  Dry conditions also expected.  High temperatures expected in the upper 80s.

However, before this system takes over for the weekend, a front and developing low pressure system will move through late Wednesday into Thursday.

 

Unexpected Cloudiness

I was out early today and noticed the cumulus was really building in some spots. Some dark clouds and a quick look at the radar- sure enough, there were some scattered showers.  Apparently there was enough low level wind convergence to cause this.

The models really blew this forecast-  Just when you think the computer models are incredible, you get this sort of poor forecast.

Philly Weekend Weather

The string of picture perfect weekends we’ve had recently will be broken Saturday, as both models have a weak surface low moving just to our south. Interestingly, this is the first weekend in awhile where there is disagreement between the NAM and GFS models- the NAM develops some showers in the afternoon, but the GFS just has cloudiness. Difficult to tell which will be correct.

Beautiful weather returns for Sunday.

Sat 6/21: Becoming cloudy in the afternoon, a chance of showers in the afternoon, especially south of Philadelphia. High 77

Sun 6/22: Sunny and warm. High 84

Storm Forecasts & Other Things "up in the air".