Sunday:Showers and very mild with later morning early afternoon high of 65 becoming windy from northwest 15-20 mph with falling temperatures to 40-45 at dark. Rain mixing with and changing to snow around midnight and continuing thru Monday until about noon, windy, cold high around 35.
Rain to snow changeover work better than phase jobs. If there is rain then generally the cold air push is not strong enough to suppress nor run it due East
Looking at temps and precip this month the years 1955,1975,1980,1984, 2017 match up. I don’t do pre DCA. This is before the showers tonight .
All of the January’s were cold and couple very cold. Hope is alive
Main thing DC always has to stay away from is never ending 1-2 week push backs. Once that starts it rarely stopped. Couple weeks ago looked like 12/27ish might start a change so let’s hope first several days of Jan do because once we start the 1/8, no 1/18 then we are most usually SOL. Feb 2007 an exception but far from the rule
Really
This Again?-pattern change just a month away. Probably the most over stated yet under occurrent statement that gets made here, along with the 360 GFS always showing a big winter event
I think we are In the favorable two months mostly below average trait DC displays. Not April May or Sept Oct this time. So we got from now until about 1/1/22-1/15 . These lows just wanna go west with some serious cold coming in behind but the miler Bs just don’t work here. 12.5” DCA seems right
Andrews23 DCA 30 and Andrews is further East and south and in a similar situation of marginal “heat island” influences of being surrounded by improved property.
Andrews really is the killer of all OK at DCA.