December 2010

[Brian]

LOL! (groundhogzilla-ish)

That is hilarious and so true. Thanks for the laugh. :lightning:

[NEGa]

It's almost in the teens already with a temp of 20.1

[WeatherNC]

27/9 at the airport as of 10:30 with a nw wind @ 5mph... Cold outside, anyway you look at it. Turned the sprinkler on for a little bit this evening on the hated bradford pear, put down about 1" of ZR on the lower half over the course of an hour. Have not seen the damage yet, but imagine it will be a site come morning. We still have a few patches of SN on the ground, one would have thought with ground temps being warm and only about 1" accumulation, it would be gone. But it is still hanging on in the most sheltered areas. A few of the neighbors houses still have snow on one side of the roofs. 72 hrs after the event, which is unusual here, especially given such meager amounts. Given temps in the mid-upper 30's tomorrow, we could conceivably have a patch or two hanging around for 100 hrs afterwards.

Don't want to commit to a OH Valley track on the storm system this weekend just yet, however, the setup argues strongly for one. There could be some sn-squalls on the backside early next week which would be isolated and non-accumulating in nature, given the flow aloft. After that, near record cold is on tap. Followed by a moderating trend and mid-Dec thaw. I am keeping my eye on the week leading up to Christmas, and the day itself, as the MJO is just getting active and -NAO may be relaxing a bit, to allow something to pop down south.

[BullCityWx]

18º already...we've spent 1/4th of the past 24 hours at 20º or below. Unreal.

[SBUWX23]

18º already...we've spent 1/4th of the past 24 hours at 20º or below. Unreal.

Impressive!

[chapelhillwx]

18º already...we've spent 1/4th of the past 24 hours at 20º or below. Unreal.

Wow... 23ish here. It's interesting.... Charlotte got down to 13, I think, while Chapel Hill could barely manage 23 last night.

[HWY316wx]

We are parked at 25 here.

[NCHurricane]

25.5/10.2 here.

[BullCityWx]

Wow... 23ish here. It's interesting.... Charlotte got down to 13, I think, while Chapel Hill could barely manage 23 last night.

You guys kept a breeze all night though, we went calm all night.

[MotoWeatherman]

Sitting at 20.2 and falling. And to think that the current 0z GFS is saying my high on Monday will be only 20......

[BullCityWx]

Impressive!

That's impressive for sure but look at this post I made with a 18z GFS sounding...ridiculous cold considering it's 1PM in the afternoon:

http://www.americanwx.com/bb/index.php?/topic/1752-december-2010/page__view__findpost__p__77688

[SBUWX23]

That's impressive for sure but look at this post I made with a 18z GFS sounding...ridiculous cold considering it's 1PM in the afternoon:

http://www.americanw...dpost__p__77688

Wow! I missed that post. I need to check out RDU at the same time on the 00z run.

Using BUFKIT, I see similar on the 00z run. Impressive indeed!

[rduwx]

25.3 imby....Slight breeze is keeping temps up.

[FoothillsNC]

the cold shoots down south to cover the Fl. peninsula, which is a devastating freeze for the citrus crops. Most of Ga and the Carolinas spend atleast one day not getting out of the 20's which is amazing, with no higher than 15 in the mountains of Georgia and NC, and thats the 2500 foot elevations...staying in single digits up higher. Winds are also a factor in this outbreak. Upslope snow would be pure powder with almost unheard of ratios. The ridging in Canada looks nice, but we have limited time after day 10 to take advantage of a southern system...but by then we're at our shortest days of the year. Plenty of options for wintry precip somewhere in the South if the 50/50 holds like that, which given the severity of the vortex shown on both models, looks pretty likely. All in all, the coldest outbreak probably since 1996 atleast in NC and probably SC and GA as well. Its not quite as cold or for as long the further west you get into w. Tenn and Arkansas due to the block being where it is, and the atmosphere so blocked up at a standstill.

[DCMetroWinston]

Wow... 23ish here. It's interesting.... Charlotte got down to 13, I think, while Chapel Hill could barely manage 23 last night.

For the record, Charlotte got down to 12 degrees.

[Marion_NC_WX]

18 degrees already, we got down at 15.2 Tuesday Morning...

[FoothillsNC]

Down to 17 . Time for 3 covers, 1 dog and a cat. Good night all.

[DCMetroWinston]

Greensboro is at 19 at midnight.

[POWERSTROKE]

a brisk 19 here now

[POWERSTROKE]

for those of you that like JB he just posted that he is not sure when the cold leaves. He says could last until after holidays and now even up to after the bowl games. Last bowl game is January 10th. He did say when the blocking moves look out, I guess we shall see

[Lookout]

the cold shoots down south to cover the Fl. peninsula, which is a devastating freeze for the citrus crops. Most of Ga and the Carolinas spend atleast one day not getting out of the 20's which is amazing, with no higher than 15 in the mountains of Georgia and NC, and thats the 2500 foot elevations...staying in single digits up higher. Winds are also a factor in this outbreak. Upslope snow would be pure powder with almost unheard of ratios. The ridging in Canada looks nice, but we have limited time after day 10 to take advantage of a southern system...but by then we're at our shortest days of the year. Plenty of options for wintry precip somewhere in the South if the 50/50 holds like that, which given the severity of the vortex shown on both models, looks pretty likely. All in all, the coldest outbreak probably since 1996 atleast in NC and probably SC and GA as well. Its not quite as cold or for as long the further west you get into w. Tenn and Arkansas due to the block being where it is, and the atmosphere so blocked up at a standstill.

It probably won't just be 20s but low 20s in the west and mid 20s at best even in the downslope heat sink here. What is even more astonishing is the 18z gfs (and the 0z gfs should be colder but haven't looked yet) showed savannah below freezing at 18z on that day as well..and that's under mostly sunny skies. Don't know when the last time they stayed below freezing under sunny conditions.

18z gfs was devistating for florida, showing freezing temps all the way to the very southern tip. the 0z gfs doesn't look quite as cold with more wind. BUT the 0z gfs implies ocean effect snow showers on the west coast. Soundings at tampa bay support flurries monday/monday evening!

When was the last time we saw the -10c isotherm that far south into florida?

[Lookout]

588dm heights in greenland at hour 192

oh and about south florida. How about 30 with a dewpoint of 2 in miami! Yes TWO.

And check out the winds. Those folks would think the end of the world was coming. I know in the florida thread they said the all time record low in miami is 30 but I would love to know what their all time record low dewpoint was. That has to be close.

Of course this is 6.5 days away mind you so take it for what it's worth but that is damn impressive numbers regardless.

Date: 6.5 day AVN valid 12Z TUE 14 DEC 10
Station: KMIA
Latitude:   25.82
Longitude: -80.28
-------------------------------------------------------------------------------
LEV PRES  HGHT  TEMP  DEWP  RH  DD   WETB DIR SPD THETA THE-V THE-W THE-E   W
    mb     m     C     C    %   C     C  deg knt   K     K     K     K    g/kg
-------------------------------------------------------------------------------
SFC 1025     2  -1.1 -16.7  29 15.6  -5.1 318  14 270.1 270.3 266.7 273.0  1.01
 1 1000   196  -2.9 -22.8  20 20.0  -7.1 324  21 270.3 270.4 266.1 272.1  0.61
 2  950   603  -0.6 -28.6  10 28.0  -6.2 332  31 276.6 276.6 269.8 277.7  0.38
 3  900  1036   1.2 -36.9   4 38.1  -5.7 331  31 282.8 282.8 273.1 283.4  0.18
 4  850  1496   2.3 -42.6   2 44.9  -5.4 329  31 288.6 288.6 276.1 288.9  0.11

[weatherheels]

Just sitting here thinking about what could have been. Normally seeing a radar like this knowing it's plenty cold enough to support frozen precip would have me pumped. Too bad this cold is dominating us right now, and its just round 1.

[dsaur]

Just sitting here thinking about what could have been. Normally seeing a radar like this knowing it's plenty cold enough to support frozen precip would have me pumped. Too bad this cold is dominating us right now, and its just round 1.

It does look interesting. I'm at 26 with RH at 57.2, dpt at 12.8 and wet bulb 22.6 according to the Experiment Station. Wondering if those numbers can come up in this cold I'm betting a few pellets will make it down...if I'm under the right cloud. T

[dsaur]

Well, they are giving me a slight chance of sprinkles/flurries and a high of 38. Maybe sleet sprinkles...it would take something hard to make it down thru all that dry. T

[John1122]

Well good luck with squeezing out anything. This was modelled as a Havana Express a few days ago.

[dsaur]

Well good luck with squeezing out anything. This was modelled as a Havana Express a few days ago.

Even this one with all this cold air seems to be headed across the deep south, and not the ocean. I've come to always be suspicious of the called suppression with goofy.

Now if the next one would just come through Fla. I'd be stoked, and would forgive the gfs its vagaries. T

[Buckethead]

Starting out the day at 16.4 currently, may drop another degree or two, with a dewpoint of 10.4.

[Cheeznado]

Parting shot before hitting the sack- 06Z GFS has backed off on the cold air by a fair amount......

[Poimen]

17.0 in Youngsville this morning.