The cool season (Oct-Mar) severe weather occurances are rare but do pose a significant forecast challenge in the Mount Holly NJ warning area. In order to better understand the problems associated with cool season severe events, the NWS PHI county warning area (CWA) were selected for study.This region is often depicted as a transition zone of climatic regions in the Mid-Atlantic states given its variations in soil types, elevation, and physiographic features as well as it's proximity to and influence from the Atlantic Ocean.

The local storm reports from the Storm Prediction Center(SPC) was examined for each of the five cool seasons of 2000-2001 through 2004-2005 to determine the type and frequency of severe weather events for the study region. The severe weather reports included cases of tornados, large hail, and high winds.