January 20, 2009 Snowfall
On January 20, 2009 Southeastern North Carolina and Northeastern South Carolina experienced a
significant snowfall. This was the first significant snow in several years...especially along the coast.
500 MB Pattern |
Surface Pattern |
Frontogenesis Fields |
Visible Satellite |
Snow Pictures |
The 500mb pattern consisted of a deep east coast trough with several embedded short waves.
The surface pressure pattern showed an area of low pressure developing in the lee of the Appalachian Mountains. This
low pressure would move off the coast and allow cold air to move in.
GFS Frontogenesis Model Fields
The GFS frontogenesis fields...in the layer from 850 to 700MB...displayed the best omega...ie vertical motion with the system.
The warm colors represent upward vertical motion.
NAM Frontogenesis Model Fields
The NAM frontogenesis fields in the 850 to 700MB layer were very close to the GFS model fields.
Visible Satellite Imagery
The visible satellite imagery matched up well with both the GFS and NAM 850 to 700MB frontogenesis fields.