•Strong Low Level Omega with snow band
•>90% RH in favorable snow growth area
•Strong 1 to 3km winds of >40 knots
Well saturated
Strong low level wind field sometimes breaks down dendrite growth, less accumulation, but warmer BL temps help to aggregates snowflakes to produce large flake size.
Max ice crystal growth rate occurs near the level of max upward air motion within the cloud, where the greatest water vapor is delivered. (Auer and White 1982)