Thread for 12/14 potential dusting, arctic air, and 12/17 potential slop

[high risk]

 

      The local elevation-depdendent differences are due to the incredibly shallow inversion, as depicted on the 00z Dulles rob

 

 

[high risk]

  midnight obs:    IAD   52

                         DCA  48

                         BWI  34 

[Round Hill WX]

4 minutes ago, high risk said:

  midnight obs:    IAD   52

                         DCA  48

                         BWI  34 

Up 15 degrees in Round Hill the last 2 hours. Winds went from calm to now 10mph with gusts to 23 out of the SSW. Cool stuff...

[Jebman]

It feels like early May outside, 57/54 in the middle of the night!!!!!!!

This is what happens when the mean 500 trough is persistent in the center of the US. We will experience glancing blows of paralyzing arctic air followed by unbelievable mild weather which will be VERY VOLATILE for the eastern US.  This is typical neutral negative enso weather. We will see these cycles over and over and over and over and over again.

 

I still stubbornly insist that we will enjoy a decent snowy winter, but it is going to be extremely volatile, with strong emphasis on EXTREME. You will need to keep a spring wardrobe and a deep extreme winter wardrobe on hand for the next  three and a half months. Spring will be delayed also as the mean 500 trough finally shifts east just in time for it to give us not snow but stacked lows spinning in place for days and days with chilly drizzle in April and May.

Sound familiar? Remember May 2016?

[Jebman]

16 hours ago, das said:

Temp is up to 28.9F here in Clarksburg.  No drip, drip, dripping yet.  Storm totals were 0.4" of SN/IP and 0.1" ice accretion.

Jeb would be proud of my shoveling, I believe...

Excellent Job!

[smokeybandit]

33 at 1am, 52 at 2am

[WVclimo]

Briefly hit 40 with a rain shower around 7:00 a.m.  Now back to 39.  Asphalt driveway and concrete sidewalks still have a glaze of ice.  Hoping the heavier rain moving in takes care of that before we refreeze later.

[Scarlet Pimpernel]

Couple of photos from yesterday's event before it disappeared.  I'd estimate maybe ~0.15" ice accretion where I'm at.

Dogwood buds

 

Leaves on a bush right outside

[87storms]

Around 60 degrees here.  Got my screen door open.  Very comfortable temps, but will be short lived.

[snowfan]

Been so dry lately that I opened a window and the sliding door on the first floor. Feels nice out. 

[Stormpc]

64.5/60. Feels good kind of. Glad it's short-lived though. Interested to see how well showers hold up through the mountains.

 

 

[nj2va]

Went from 52 to 34 in less than an hour. Rain turning to sleet/snow mix out here in McHenry.

[nj2va]

All snow now and already accumulating.

[mdsnowlover]

Just now, nj2va said:

All snow now and already accumulating.

better enjoy it, nothing on gfs or euro for 15 more days

[BlizzardNole]

11 hours ago, das said:

Love the microclimate stuff going on right now. High point in Clarksburg is 700' around 1/2 mile from my house. It's 42F there. Here at my house in a little hollow at 570' on Parr's Ridge, it's 33.1F with a completely calm wind, a degree off of the high for the day. 

I tend to to geek out about this stuff as I visualize the physics going on. My wife says I am a nerd...

When I was in Tallahassee, we'd have some crazy winter morning temp ranges between the TLH airport, which sits in a bowl, and downtown Tallahassee which is up on some hills only eight miles away.  Once I heard 32 at the airport and 51 in town.

We could also go from the upper teens to the 60s then back to the teens in very dry winter air masses.

 

[mattie g]

2 hours ago, mdsnowlover said:

better enjoy it, nothing on gfs or euro for 15 more days