While the NAM is an outlier atm, other NWP models are a baby step away from yielding a Jan 2000 look or nothing @ all. Properly timed phase w/ the trailing s/w makes all the difference. This setup is extremely fickle w/ large amts of diabatically driven PV rapidly growing upscale pic.twitter.com/livD6cXYs6

— Eric Webb (@webberweather) January 1, 2018