24/7 LivePhiladelphiaPennsylvaniaNew JerseyDelaware

PHOTOS: Cecily's Winter Weather Outlook images

North America had the highest snow cover on record during September. By the end of October, Siberia had its second highest snow cover on record.
Sea temperatures over the next 3 months are forecast to be above normal in the eastern Gulf of Alaska and above normal in the central Pacific - meaning a weak El Nino winter.
This combination typically creates a big ridge in the west.
But what goes up must come down, resulting in a trough here in the east, resulting in a trough here in the east.
This big dip in the jet stream will open the door for a cross polar flow that allows arctic air to stream from Siberia across the North Pole and south into our region.
If northern branch of the jet stream links with moisture from southern jet, nor’easters develop. Add an increased threat of blocking and these storms can be slow-moving.
expect to see several nor'easters, with mixed precipitation, that means an increased threat of icing, and more visits from the Polar Vortex.
In terms of snowfall, I’m predicting around 150% of normal in Philadelphia & along the I-95 corridor giving us 30 to 36 inches.
In the Lehigh Valley, 160% of normal, 36 to 42 inches.
And at the shore, with mixing cutting down on snowfall, 140% of normal, 18 to 24 inches.
1 of 10
North America had the highest snow cover on record during September. By the end of October, Siberia had its second highest snow cover on record.
WPVI
Friday, November 14, 2014

See Cecily Tynan's Winter Weather Outlook in pictures.

Report a correction or typo
Watch Live
ON NOW

Top Stories

2 teenagers killed, 1 injured in separate shootings in Wilmington

  • 29 minutes ago

Another measles-related death reported in Pennsylvania

  • 41 minutes ago

Jalen Hurts throws 3 TD passes and Eagles stuff Commanders' late 2-...

New details on investigation into Hayden Panettiere's death

  • 1 hour ago

AccuWeather: Bright, breezy and less humid today

  • 2 hours ago

Juvenile pedestrian hit in Atlantic County

  • 32 minutes ago

Man killed after car crashes into tree on City Avenue

  • 35 minutes ago

Eagles fans celebrate season‑opening win over Commanders

  • 26 minutes ago
6abc Philadelphia
Topics
HomeWeatherTrafficWatchPhotosApps
Regions
PhiladelphiaPennsylvaniaNew JerseyDelaware
More Content
InvestigationTroubleshootersConsumerHealthcheckOverheardLinks from Action NewsArt of Aging
6abc
About 6abc/Contact Us!Action News Biographies6abc Contests & PromotionsTV ListingsAccessibilityEmploymentCommunityHelp With An Antenna
Privacy Policy
Your Privacy Choices
Children's Privacy Policy
Your US State Privacy Rights
Terms of Use
Interest-Based Ads
Public Inspection File
FCC Applications
Copyright © 2026 ABC, Inc., WPVI-TV Philadelphia. All Rights Reserved.