The North American blizzard of 2009 was a Category 2 ( significant ) nor'easter that formed over the Gulf of Mexico in December 2009 and became a major snowstorm for the East Coast of the United States and Canadian Atlantic provinces. The snowstorm brought record-breaking December snowfall totals to Washington, D.C., Baltimore, and Philadelphia.
The blizzard of 2009 started to impact the northern Mid Atlantic early on Saturday morning over southern New Jersey with light snow. The snow quickly expanded north and west into the Philadelphia metropolitan area by day break with a steady light to moderate snow. Meanwhile, surface temperatures had fallen to the mid 10's to lower 20's over the northern interior and mid 20's to lower 30's along the coast. Dew points however were a more influential factor with a range of the negative single digits over the Hudson Valley to the lower 10's over much of the coastal plain.
