The mystery of snowfall

Published 7:25 AM EST, Thu February 13, 2014

Story highlights

Ice and snow storms are crippling some states in the Southeast

Ian Roulstone: Predicting how much snow will actually accumulate is difficult

He says the physics of snowfall is complex, involving factors like temperature, moisture

Roulstone: Making the final call comes down to "seat of the pants" knowledge in the end

Editor’s Note: Ia