PHILLY WEEKEND WEATHER OUTLOOK

A new feature- in addition to  my regular Friday evening weekend weather forecast, I’ll be offering a mid-week weekend weather outlook.   An outlook is different than a forecast- it identifies likely weather conditions,  but it doesn’t  get too specific.

And here it is, based on review of several experimental statistical models and the operational GFS…

A cool front will move through late Friday afternoon and evening as an upper trough builds in for the weekend.  The front stalls to our south.

The upper cyclonic flow combined with the stalled front will give unsettled conditions for Saturday and Sunday.  A mix of sun and clouds with the chance of showers, especially late afternoon on Saturday and Sunday.  It’s not a washout by any standards.    It’s more an issue of “self-destructive sunshine” as any sun may trigger clouds and scattered showers due to instability.   Again, showers most likely in the late afternoon.  Highs in the mid-70s.

The exact location of the stalled front will play a large role in how inclement the weather gets. The timing of upper air disturbances will also affect the forecast.

Thurs AM update- Things already have changed. The front stalls closer to our area.    Saturday has increasing chance of rain in the afternoon. Sunday is looking to be cloudy with rain.