Switch to Desktop Site

Snowstorm exits, but temperatures stay frigid. Why so cold?

(Read article summary)

Michael Wirtz/The Philadelphia Inquirer/AP

(Read caption) A pedestrian walks through drifting snow along Chester Pike in Sharon Hill, Pennsylvania on Friday.

About these ads

As they lean into their snow-shoveling for warmth, New Englanders might be wondering why a nor'easter that dumped more than a foot of snow across several Eastern states, left such exceptionally cold temperatures in its wake.

Winter storm Hercules, which hit the Eastern Seaboard between Thursday and Friday, was what meteorologists call "well organized," meaning that at least three major factors converged to produce a lot of snow and a lot of cold. An Arctic air mass descended through Canada and hit the warmer Atlantic, where the system both gathered moisture and sucked the water's warm energy upward – at just the same time that a jet stream arrived from Alaska, delivering turbulent, eddy-riddled air.


Page:   1   |   2   |   3