Sunday- Warm, Cloudy with showers late

Today’s forecast probably over-stated the cloud cover.   I usually use the GFS relative humidity data for cloud cover, but for tomorrow, I’m trying the NAM relative humidity upper air data for predicting cloud cover.

So, after a bit of sun early Sunday morning, there should be an increase in cloudiness as the morning and day proceeds,   Showers appear likely by 5 PM, then becoming windy and cooler.

High temperatures will be in the low 70s!

 

Philly Weekend Weather Forecast

The small dip in the jet stream that brought us the chilly weather today will relax and a return of a southwesterly flow at the surface and aloft on Saturday will bring mild temperatures and some cloudiness.

Saturday will start cloudy but clouds will break for a mix of sun and clouds later in the morning.  A mix of sun and clouds is expected in the afternoon with  a high of 66.

The mix of sun and clouds on Sunday. Very mild with a high of 72.  Cloudiness increases late afternoon as a weak cold front moves through. Light showers after 5 pm.

Weather… and Other Things 'Up in the Air'