Philly Weekend Weather Forecast

An arctic airmass with windy conditions from a strong pressure gradient caused by the exiting nor’easter will bring cold temperatures for Saturday and Sunday.

Saturday morning will have some low level instability stratocumulus clouds, that should dissipate by the afternoon.  It will be windy and very cold. High temperature about 17.

After low temperatures near zero Saturday night, Sunday will start sunny, but mid-level cloudiness is expected during the afternoon as milder air moves in aloft ahead of a warm front approaching late Monday. High temperatures near 23.

Attention will turn to late Monday as a warm front type precipitation event will occur late Monday into Monday night.

A snow to freezing rain/sleet event is likely Monday night into Tuesday.

Final Snow Update- 12 PM

The continuous snow will be ending between 1-2 PM or so in the city.

This morning’s model runs had both the GFS and NAM nearly identical, with a QPF of 0.33 between 7 AM and 1 PM, then ending.

Snow totals in my area (just northwest of the city limits) has been 4 inches at 12:00 noon.  Still a bit to go.

Snow totals measured and recorded by NWS can be found at http://forecast.weather.gov/product.php?site=NWS&issuedby=phi&product=PNS

Predicting snow totals is anything but easy.   The average between the NAM and GFS last night probably gave the best guess for the immediate PHL area.   The NBM model probably would have come up short on snow totals.