WEEKEND WEATHER FORECAST

Tonight’s NAM continues with a westward trend and has fairly heavy rain for Philadelphia on Sunday.

High pressure will move over us on Saturday.

Saturday looks to be sunny and dry with warmer temperatures and less wind.  High 65.  (Some cirrus clouds move in during Saturday late afternoon.)

The remnants of a tropical low moving up from the south will affect our weather on Sunday.

Most of today’s models have the low pressure system moving just close enough to bring showers to Philadelphia and the immediate western suburbs on Sunday.

NAM forecast for noon Sunday

The NAM is most aggressive with the rain and its western track, but the current GFS, Canadian and ECMWF all have light showers in our area either late Sunday morning or early afternoon. (Heavier rain in NJ.)

The NAM has been consistent, but may be over-doing the rain.

An easterly wind flow and clouds will keep it chilly with a high of 57.

 

WEEKEND WEATHER OUTLOOK – FRIDAY

Saturday looks to be sunny and dry with warmer temperatures and less wind.  High 63.

The remnants of a tropical low moving up from the south had been expected to move out to our east, missing us.

However, recent model runs from the GFS, CMC, ECMWF (European) and NAM show the low to hug the coast, then move eastward, with precipitation just making it into Philadelphia on Sunday early afternoon.

NAM model precipitation/ pressure/cloud  forecast for 2PM on Sunday

(The above NAM forecast has precip slightly further west than the other models mentioned.  Its QPF of about 0.40 inches water may be overdone.)

Sunday looks to be cloudy with the chance of light showers Philadelphia and westward and heavier rain in NJ.  High 60.

There’s still uncertainty with the Sunday system.  I’ll update this evening.