Daily Archives: Friday, December 11, 2020 10:17 pm

Winter Weather

INTERESTING WEATHER FOR MONDAY – THE SEQUEL

 

Too early to hang one’s hat on the this, but while I’m at it, I thought I’d share the latest GEFS snow forecast for WEDNESDAY into THURSDAY—

GEFS Total Accumulated Snow Depth Forecast Thursday morning  (Click on image for a larger view.)

 

from Friday night…

So, I had closed the book on the new pre-release GFS model v 16 prediction of some light non-accumulating snow on Monday morning. (See this morning’s post.)

However the new NAM model data has become available this evening and it has quite a surprise. Hard to believe, but it’s showing dynamic cooling just northwest of Philadelphia and some accumulating snow!

Here’s the latest NAM model snow forecast—

NAM Model Snow depth Forecast 1 PM Monday (Click on image for a larger view.)

The NAM tends to over-forecast precipitation this many hours in advance, but the forecast for Monday remains interesting, especially after 60º high temp forecasts for Sunday! Stay tuned.

Tonight’s GFS also shows significant snow in the Wednesday – Thursday timeframe

Philadelphia Area Weather Forecasts

WEEKEND WEATHER FORECAST

An easterly to southeasterly flow ahead of a warm front will bring clouds to the Philadelphia area on Saturday. Most models have light precipitation mostly confined to areas in NJ on Saturday, but a brief sprinkle is possible late morning.

The warm front moves north of our area, bringing very mild temperatures and clearing for late Saturday and Sunday.

It should be noted that the Canadian models show highs on Sunday in the mid 60s!

Temperatures drop significantly on Monday with light rain.