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December 2023 Mid/Long Term Pattern Discussion: Let it Snow!


John1122
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First full SPV split I've seen in the long range this season on the 0z GFS

giphy.gif

Sadly the 6z wasn't as enthusiastic, but it is still way out there. GFS was trying to get to the above a couple times yesterday, but didn't quite make it. 

Here is the same evolution at 50 mb:

giphy.gif

 

Should be a fun 3D vortex tomorrow AM. It only runs the previous days 0z data to make that visual, so we won't have tonight's 0z for the 3D images until tomorrow. 

 

 

 

 

 

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46 minutes ago, Carvers Gap said:

Blizzard warnings have been raised over the Plains.  That, in turn, sets the stage for a colder pattern over our area to be ushered in later this week..

I had a similar thought yesterday. Seasoned weather weenies know to root for snow in other locations. I can't recall the last time I was so stoked to see Nebraska getting a foot of snow. It's like we're watching Mother Nature line up the dominoes...

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General ob in passing as I read today's updates: It sure seems whatever transpires in the short to mid-term pattern-wise will be fluid with a decent ceiling for amplification. I will not speak to any specific system timing; however, it sure seems like there's a better chance of local winter weather mischief as opposed to a grinch-like torchy pattern locking in. The latest weather vids I've watched from DT and BamWx have been encouraging. Even when you talk about MJO progression into mild phases, it seems we have half the primary NA teleconnections cooperating at any given time. Not seeing much evidence to unfavorable stalls anywhere. I'll take it two days into calendar winter. 

Could you link those videos please so I can follow their pages? Thanks


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5 minutes ago, tnweathernut said:

The system that follows around day 9-10 missing the TN Valley to the south interests me….  

Yeah, lots of energy flying around on modeling the next ten days.  It Will be interesting to see if we can get some cold air to cooperate with us on one of these upcoming storm systems.  Gotta love the recent trends on storm tracks though!

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'Twas a night before the solstice, when all through the land, Not a snowflake was found to help us in hand. The elves had worked hard with no reprieve, And while Santa made plans there was too much to grieve.

To have true Christmas bliss we'd need some white fluff, But like every year our sees of powder were rough. No sleigh rides across town and no skiing nearby, Not even from far away could snow be spied!                

But we held firm hope and wished real loud: Please let this change for our holiday crowd!             

We sure really knew that it wouldn't work out- We never get rewarded with frozen clout!          

In other places kids put on their boots; Ours just sit by sadly who use many reproofs !      

Will the reindeer ever soar 'cross the sky? Will there ever come transformation or is it goodbye?

For all those whose joy will likely prove fleeting- To you I give lots of comfort greetings!

 

Merry Christmas to all!

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Merry Christmas (Eve....24th run) from your favorite ext global ensembles....2x 46day and 1x35day snow maps.  Euro control is picking up on two storms - Jan 12th and Jan 22nd.  When snow gets to the Panhandle....usually a good thing on modeling.  Modeling definitely is keying on an inland runner Miller A primary track with likely some Miller B thrown in as well.  Snow pack to our north means cold air could return in a hurry if the MJO will allow it or the NAO locks.  No idea if correct, but enjoy!

Screen_Shot_2023-12-25_at_9.53.40_AM.pngScreen_Shot_2023-12-25_at_9.53.56_AM.pngScreen_Shot_2023-12-25_at_9.54.19_AM.png

 

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Merry Christmas (Eve....24th run) from your favorite ext global ensembles....2x 46day and 1x35day snow maps.  Euro control is picking up on two storms - Jan 12th and Jan 22nd.  When snow gets to the Panhandle....usually a good thing on modeling.  Modeling definitely is keying on an inland runner Miller A primary track with likely some Miller B thrown in as well.  Snow pack to our north means cold air could return in a hurry if the MJO will allow it or the NAO locks.  No idea if correct, but enjoy!
Screen_Shot_2023-12-25_at_9.53.40_AM.pngScreen_Shot_2023-12-25_at_9.53.56_AM.pngScreen_Shot_2023-12-25_at_9.54.19_AM.png
 

Miller B’s are not friendly to us west of 40/81. Seems like we always end up getting dry slotted during the handoff but NE Tennessee and the plateau seems to do well.


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51 minutes ago, PowellVolz said:


Miller B’s are not friendly to us west of 40/81. Seems like we always end up getting dry slotted during the handoff but NE Tennessee and the plateau seems to do well.


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I don't think Miller Bs help any of us....I was just explaining the snowpack over the Midwest.  Hybrids work up here though.

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12z ensembles(CMC and GFS) are rolling currently, and many members do show chances for light accumulations later this week.  There are a wide range of solutions ranging from west to middle to eastern forum areas or some combo thereof.  Good luck to modeling as it tries to figure that one out.  I do think the pattern after next weekend looks really good FWIW.

edit:  To clarify, modeling looks good through maybe the 12th before taking a 10-20 day break.  

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hopefully we see our

first snow of the year here

.LONG TERM...
(Wednesday through next Monday)
Issued at 1240 PM CST Mon Dec 25 2023

A slow-moving closed upper-level low will be the main feature to
watch through the extended. On Wednesday, this low slowly tracks
southeastward through Missouri, and by late Wednesday night,
shower activity may begin to develop across far northwest portions
of our area. Showers spread eastward through Middle TN through the
day on Thursday, and then likely become focused across the east
by early Friday. This is a cold system so temperatures will fall
with its arrival which of course has an impact on our
precipitation type. With temperatures in the low to mid-30`s to
start the day Thursday, precipitation will likely begin as a rain-
snow mix before changing to primarily rain as temperatures warm
into the 40`s. A changeover back to snow or a rain-snow mix would
then be favored Thursday night and into Friday morning as
temperatures fall again.

As far as accumulations go, at this time it`s still not looking
like anything to get too excited about. Model guidance is in
disagreement about how far south the upper-level low will manage
to track. The GFS and its ensembles in particular track a
stronger, colder closed low directly overhead, and as such, have
greater probabilities of accumulating snow. It`s definitely
something to watch to see if that trend persists, but for now, am
leaning towards the majority of guidance which doesn`t dig the low
quite as far south.

Rain and snow showers come to an end Friday as the closed low
finally exits. By the end, best probabilities of accumulating snow
will be along the Cumberland Plateau. Some locations in
Fentress/Cumberland counties may receive accumulations near a half
inch.
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