CFS is dead set on a drastic pattern shift to warm/very warm for much of the CONUS starting around mid-March. It's super far out, but it's been remarkably consistent with this pattern change (has even trended warmer in recent days), so it'll be interesting to see what happens. It has support from the extended GEFS as well, so there may be some truth to it. One thing is clear, however: the first week of March will be cold.