In my part of Lincolnshire we have 850s of about -9, a north easterly and it is early Feb. Just been out with the dog and whilst cold in the wind there is not even a ground frost. Looks like we will have 850 of -11 early hours of Monday and again air temperatures above freezing. At the time of year when the sea should not be modifying the temps too much it is somewhat disappointing and worrying for winterery weather prospects that not freezing through the nights. Whilst we might get some sleet/snow showers not hopeful of anything that will bring much of an accumulation or stick around for very long. My boy needs to sledge.
I always thought that -10 850 were where things are usually interesting. If not snow then usually get a hard frost. Is it the thicknesses that are the issue? Any ideas why it's not that bit colder with the set up and the time of year?