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Deep South Christmas COLD

Posted on 12/15/22 at 4:12 pm
Posted by bayoubengals88
LA
Member since Sep 2007
18997 posts
Posted on 12/15/22 at 4:12 pm
rds must be busy, but we've got to have a separate thread now.

After beginning the first half of December a whopping 13.2 degrees above average, it felt like a pattern switch had to happen. Well, it is!

A high pressure system is setting up around Greenland that will provide some classic blocking thus allowing the jet stream to dip well into the lower 48. This is known as -NAO or simply, Greenland blocking. Seen in the picture below, -NAO typically means a cold UK as well, which is also happening right now. London has recently experienced highs below freezing (pretty rare).

>

Additionally, cold weather fans are hoping for a ridge to develop near the Pacific Northwest, thus forcing cold air into the middle and eastern half of the US.

For a classic example of blocking, see January through March of 2010. Wow, what a cold year that was. Trees were bare halfway through April!
In January, Baton Rouge had twelve consecutive mornings below freezing, and the month of February was 10.1 degrees below average.

I make no promises for the rest of this winter, but it looks like we'll get a cold shot from 12/22 to 12/28.

This map from the latest GFS ensemble shows the cold entering the lower 48 on 22 December:



There is good agreement on the cold air between the GFS, Euro, and the Canadian, with the Canadian showing temps as low as 16 around Baton Rouge.

Will we get moisture for snow? I'll leave this thread to the experts at this point.

Lastly, I find this info to be quite helpful:
This post was edited on 12/19/22 at 9:31 am
Posted by Tbonepatron
Member since Aug 2013
8447 posts
Posted on 12/15/22 at 4:13 pm to
Somehow this will change and it’ll be 78 and muggy…
Posted by fallguy_1978
Best States #50
Member since Feb 2018
48793 posts
Posted on 12/15/22 at 4:14 pm to
Guess I better wrap my pipes this weekend but otherwise bring it on. I like it to be cold this time of year.
Posted by dawgfan24348
Member since Oct 2011
49340 posts
Posted on 12/15/22 at 4:15 pm to
34 degrees with freezing rain
Posted by bayoubengals88
LA
Member since Sep 2007
18997 posts
Posted on 12/15/22 at 4:16 pm to
quote:

Somehow this will change and it’ll be 78 and muggy…

I don't see that happening. rds dc has been sold on this cold for about a week, and Duke added this as early as 12/9:

quote:

Whats not to be sold on for the southern cold snap toward Christmas.

Ridge over Alaska. Still on a -NAO. -AO also inbound (look at dem titties on the image above ya). All lined up to uncork that Arctic air, pump it into the US, and keep it generally boxed in with the blocking.
Posted by Darth_Vader
A galaxy far, far away
Member since Dec 2011
64797 posts
Posted on 12/15/22 at 4:18 pm to
quote:

I make no promises for the rest of this winter, but it looks like we'll get a cold shot from 12/22 to 12/28.


Good. I’m off work starting on the 23 and I don’t go back until the 3rd. I hope to have some nice wintery views out the window in front of my model desk.
Posted by bayoubengals88
LA
Member since Sep 2007
18997 posts
Posted on 12/15/22 at 4:19 pm to
quote:

34 degrees with freezing rain

Is this a joke

The good thing about this system is sleet and freezing rain seems unlikely. With the deep column of cold air, it'll be rain, snow, or rain and snow.

It can snow at 34+ down here if that column of cold extends far enough to the surface. I've seen it (2002 and 2008)

By joke I meant that freezing rain is not possible at 34°. Only rain, sleet, and snow are.
This post was edited on 12/15/22 at 5:15 pm
Posted by TheFonz
Somewhere in Louisiana
Member since Jul 2016
20471 posts
Posted on 12/15/22 at 4:19 pm to
quote:

34 degrees with freezing rain


Freezing rain is the fricking worst. I want the sweet, sweet cocaine from the sky or nothing at all!
This post was edited on 12/16/22 at 6:59 am
Posted by BigPerm30
Member since Aug 2011
26051 posts
Posted on 12/15/22 at 4:21 pm to
Leave my 65 degree days and sunny alone. I don’t need southern winter of 45 degrees, 100% humidity, overcast with a 15 mph wind out of the north. frick all that shite.
Posted by dawgfan24348
Member since Oct 2011
49340 posts
Posted on 12/15/22 at 4:22 pm to
Yeah up here in north Georgia it looks like there’s a chance for snow the 22nd and after that it’s not getting over 32 until the day after Christmas. Also the windchill for the 22nd is supposed to be -13
Posted by sledgehammer
SWLA
Member since Oct 2020
3407 posts
Posted on 12/15/22 at 4:26 pm to
Many people will be out of town for Christmas when their pipes start bursting. Is it best to turn off your meter while you’re away and assess damages later?
This post was edited on 12/15/22 at 6:10 pm
Posted by junkfunky
Member since Jan 2011
33956 posts
Posted on 12/15/22 at 4:31 pm to
If you are gonna be gone for a week or more I would say yes. Make sure you drain all of the lines and the water heater as well.
Posted by Alt26
Member since Mar 2010
28472 posts
Posted on 12/15/22 at 4:35 pm to
quote:

temps as low as 16 around Baton Rouge.


last time it got that low in BR around Christmas THIS happened.....



The experience of hearing what sounded like an atomic bomb exploding while procrastinating to get ready for Christmas Eve mass will forever be etched in my mind.
Posted by CCT
LA
Member since Dec 2006
6234 posts
Posted on 12/15/22 at 4:51 pm to
Indeed! That rumble, the ground fricking shook as the lights flickered. Lived in Westminster at the time.
Posted by junkfunky
Member since Jan 2011
33956 posts
Posted on 12/15/22 at 4:54 pm to
We were in the living room of grandparent's camp near Killian. It was near the end wall of the 2nd story. We didn't hear anything but the camp started shaking and my cousins were freaking out. I was in the middle of playing Punch Out so I was too focused to worry if I was gonna die.
Posted by trussthetruzz
Marquette, MI
Member since Sep 2020
9236 posts
Posted on 12/15/22 at 4:57 pm to
Locking in my prediction on page 1

Christmas eve snow 2-7” for SELA

11°- Coldest temp we’ll see in SELA

2 days of below freezing (for highs)
Posted by LegendInMyMind
Member since Apr 2019
54840 posts
Posted on 12/15/22 at 4:58 pm to
quote:

last time it got that low in BR around Christmas THIS happened.....

A new Pope was selected?
Posted by GetCocky11
Calgary, AB
Member since Oct 2012
51387 posts
Posted on 12/15/22 at 4:58 pm to
I’m fine with the cold. Just want it to stay dry. Too much travel happening.
This post was edited on 12/15/22 at 5:00 pm
Posted by upgrade
Member since Jul 2011
13167 posts
Posted on 12/15/22 at 5:00 pm to
That’s not the last time it got to 16 degrees down here.
Posted by bayoubengals88
LA
Member since Sep 2007
18997 posts
Posted on 12/15/22 at 5:02 pm to
All that’s pretty bold!
Baton Rouge coldest temp: 20°
Somewhere below I-20 will get 2.5”
Lowest high temp for BR: 34°
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