A low pressure area began to form over the Southeastern United States on Sunday, the 1st of March, 2009. The storm then deepened as it moved over Cape Hatteras, NC, and out into the Western Atlantic Ocean on Sunday Night. Two areas of snow rode along the Eastern Seaboard and brushed Southeastern PA, especially the Philadelphia Metro Area, with some deep snow.

The first batch of snow, which hit during the early part of Sunday Night, just barely produced an inch or two of snowfall in Lancaster and York Counties. By Monday Morning, there was only an inch of new snow in Hershey, and generally between 1 and 4 inches in Lancaster and York Counties (New Holland 2, Hanover 4.2).

The second batch of snow hit right around sunrise on Monday morning, and produced another 1-4 inches across the area South and East of Harrisburg. This brought storm totals up to almost 8 inches in southern parts of Lancaster and York Counties, with nearly nothing just to the northwest of Harrisburg.