Monthly Archives: October 2020

Philadelphia Area Weather Forecasts

WEEKEND WEATHER FORECAST

Low pressure is moving northeast off the coastline on Friday as high pressure builds in from the west.

A quick dip in the jet stream will occur tonight with some chilly temperatures by morning, as depicted by the “540 thickness line” (red line) in the SREF model—

SREF forecast for 8 AM Saturday  (Click on image for a larger view.)

Some chilly temperatures Saturday morning—

NBM low temps Saturday morning 8 AM  (Click on image for a larger view.)

 

Saturday—

  • Sunny
  • Starting from a low temperature of 37-43º,  the (NBM) high temp 58.3º sd 1.3º
  • Somewhat windy in the morning.
  • Winds NW 10-12   gusts to 15. Winds subside in the afternoon.

For Sunday, winds shift to the SSE and milder temperatures move in. Some high cloudiness expected too.

Sunday—

  • Mostly sunny.  Some high cloudiness possible in the afternoon.
  • High temp (Model Blend- NBM)  62.8º
  • Winds SE 10 mph, some gusts to 15 mph around noon.

 

Philadelphia Weather Outlook

WEEKEND WEATHER OUTLOOK

Thursday 6:40 AM Update— All the models have clear skies by Saturday morning.

A strong cold front with a possible coastal low will move through Friday and clear the coastline by Saturday morning. Following the rain on Friday, the weekend looks good.

The Canadian model is somewhat faster with the front moving through than the GFS and  NBM (model blend). Even the models that show a slower movement of the front have the clouds clearing by mid morning Saturday.

The latest SREF model prolongs the rain and has slower clearing on Saturday. So a bit more uncertainty about Saturday’s forecast.

Here’s the current Canadian CMC Global model forecast for Saturday morning showing a high pressure building in from the northwest—

CMC GDPS forecast Saturday 5 AM   (Click on image for a larger view.)

Saturday should be mostly sunny and windy in the morning.  High temps near 57º, so it will be somewhat cool, especially with the windy conditions.

Sunday should be sunny, milder and less windy with high temps in the low 60s.

We’ll see if things progress as currently forecast.