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It all began on Thursday innocuously as an ordinary snowstorm over the Plains,only to explode over the Middle Atlantic into the record-breaking, immobilizingBlizzard of 2010 by daybreak on Saturday.Modest snow tracking eastward along the Midwestern I-70 corridor yielded onFriday to heavy, wet snowfall across Indiana and Ohio. By Saturday morning, astrip of snow measuring 10 to 15 inches blanketed east-central through centralOhio.

But the storm really stepped up from noteworthy to notorious as it hopped theAppalachians to the mid-Atlantic coast. Here, the core of the storm'sprodigious snow swath exploded such that amounts of 20, 25, and in fewinstances even 30, inches piled up from Pittsburgh to Philadelphia to Baltimoreand Washington, D.C. Southern Pennsylvania, northeastern West Virginia,northern Virginia, southern New Jersey and northern Delaware, as well as muchof Maryland, all registered snowfalls of 20 to locally 30 inches.

In the wake of this mighty winter storm, seasonal snowfall has already climbedwell up the ranks of great historic winters in cities and towns fromPhiladelphia to Richmond, Virginia. And there are weeks of winter still tocome!Story by AccuWeather.com Senior Meteorologist Jim Andrews.