January 17 12z NAM omega and temperature time height diagram
Notes:
The 24 hour NAM forecast valid at 12z on the 18th also indicated that the upward vertical motion was forecast to occur in a layer with temperatures mainly between -12 and -18 degrees C. This temperature range would be favorable for the growth of dendritic snow crystals, which are often associated with high snow to liquid ratios.
Slide 21