Well BDL is staring a +18 or so in the face today. That would put them at +3.8 mtd. That would also be their largest +/- departure since -20 on 12/5. It’s been a pretty warm week for approaching the climo min of the season.
It’ll be interesting to see if we can knock the positive departures back down to normal by the end of the month.
Yeah…there’s lot of freezing fog in the valleys and at high elevation making rime ice. Freak and MWN post a lot of epic rime pics. Obviously that’s all supercooled droplets needing a cold surface to freeze/deposit on.
I remember Fort Kent Will posting some good true IC pics (maybe vids) awhile back when he still lived up there.
A lot of people confuse true DD with very light snow. It can get tricky in the mountains too because at cold temps even with weak lift you can squeeze out some snowflakes even with barely the hint of a cloud. But DD is simply ice fog. I think the Inuit term for it was pogonip.
But as you know it’s difficult to freeze tiny water droplets because of their curvature. You need really cold temps to get them to spontaneously freeze. That’s why it’s usually around -30 or colder and in valleys so it can saturate and go immediately to ice form instead of supercooled droplets.
I like big cold…I just worry about my birds and plants. There’s just something about going out in a calm -20° or colder airmass and breathing it in. 0°F is cold, but when you push -30 it’s on another level.
I don’t think anyone had DD from that airmass in SNE. Wasn’t it really windy? I remember ORH doing -10° or something in that. DD is basically the frozen form of fog…a cirrus cloud at the sfc.
Yeah let’s get those airmasses inside d7 without a moderating trend. But yeah, looks cold overall and potentially active either way. Although the 6z goofus had some creative ways to screw AEMATT despite cold and high QPF.
Op/details/6z gfs aside…
That was kind of a fun run to loop through seeing those massive, sprawling 1040+ highs sandwiched around shortwaves trying to barge through the cold. @WxWatcher007 would get his -35° at SLK under one of those highs.