It’s a method from 2004 lol. It may be better in cold profiles, but ratios are all about lift in the DGZ and this method has nothing to do with it. You could have arctic sand and Kuchera will spit out fluff.
Definitely going to warm up in some form for a few days after V day weekend. This cold can't last forever. EPS also has a low to our NW at the same time.