Your right that December was pretty dry. Late in the month Dec.27th-28th had 1.21" rain. Then on Jan.10th-11th another 1.11" with a small amt falling as 2.1" of snow but other than that meh
Would seem with the EPS flipping to a +EPO the GFS showing warm cutters ala December would be about right. Maybe you cash in on this midweek system before that happens