Texas Winter 2012-2013

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Ntxw
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Re: Texas Winter 2012-2013

#2901 Postby Ntxw » Sun Jan 13, 2013 6:24 pm

Portastorm wrote:What do you mean by saying that "Phases 1/2 favors the east coast"? Are you speaking of temperature anomalies? Phases 8 and 2 of the MJO favor below normal to much below normal temps for the Southern Plains and Texas.


The temperature anomalies based on phases is very broad. While it is good, a strong moving wave has a sharp progressing trough/ridge (convection is one large trough and pumps ridge downstream/behind it). Phases 6/7 is western Pacific convection in turn pumping up ridging off the west coast (east Pacific). 8/1 you are moving through the continent and entering the Atlantic towards Africa (1/2 favors east coast based on this logic). That shifts everything a little further east and if the wave is strong you have a sharp ridge in the west that includes Texas (very +PNA).

http://cawcr.gov.au/staff/mwheeler/mapr ... /index.htm

It's not black and white that x phases is going to produce y-outcome. It's moving and not static so the anomalies is broad so saying 7/8/1 favors the eastern half of the country but reality is 7/8 is better for us. It's the same as saying +PNA is good, but to what magnitude and that relates to the MJO

Edit:

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Re: Texas Winter 2012-2013

#2902 Postby Portastorm » Sun Jan 13, 2013 7:03 pm

OK, I was a little confused by your initial statement. Yes, I understand that the MJO in phases 7-8-1 favors West Coast ridging (or near West Coast ridging) and a trough over the eastern half or third of the nation. It's also not a clear transition as the MJO moves more in lurches or bursts in terms of behavior in the Western Hemipshere.

By the way, if any of you really want to geek out about the MJO ... this link will take you to a great paper about it.

http://metofis.rsmas.miami.edu/~czhang/publications/MJOrev.pdf
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#2903 Postby Ntxw » Sun Jan 13, 2013 7:43 pm

Can also follow model forecasts for the MJO here!

http://www.cpc.ncep.noaa.gov/products/p ... r_wh.shtml
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#2904 Postby Ntxw » Sun Jan 13, 2013 9:50 pm

0z NAM is showing snowfall for the northeast quarter of Texas Thursday. Far NW parts of SE Texas and NW Louisiana as well. Still the long range NAM and should not be taken heavily at least until we see more support from the globals

Image

At least all models now generally agree a strong cutoff low will traverse the state
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Re: Texas Winter 2012-2013

#2905 Postby Stormlover2012 » Sun Jan 13, 2013 10:00 pm

yeah but it has started to trend little colder this week, models aren't good when it comes to a cold blast, I saw the nam and hey 4 days out is interesting
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Re: Texas Winter 2012-2013

#2906 Postby aggiecutter » Sun Jan 13, 2013 10:29 pm

0z NAM has 3 inches of snow for the Texarkana area on Thursday.
http://www.twisterdata.com/index.php?pr ... hive=false
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#2907 Postby Texas Snowman » Sun Jan 13, 2013 11:12 pm

From Joe B: "@BigJoeBastardi: May see it snow all the way into I-10 corridor of Texas Thur or Fri. Money in bank sw system will be heard from. to e coast."

"@BigJoeBastardi: Gotta love it! GFS has nice wintery surprise brewing out of money in the bank system for the deep south. Could even snow on Duck Dynasty."
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#2908 Postby BigB0882 » Sun Jan 13, 2013 11:17 pm

Money in the bank? What does that even mean?

The over night lows are not going to be cold enough to support snow in my area unless they begin trending colder. They've actually been going up, probably because of so much cloud cover.
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#2909 Postby Texas Snowman » Sun Jan 13, 2013 11:31 pm

Means he thinks its a sure bet to happen.
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#2910 Postby TeamPlayersBlue » Sun Jan 13, 2013 11:34 pm

I see what he is talking about from the new GFS run, but he is biased towards snow/cold weather for his anti-global warming rant. We will have to see. Like Ntx said earlier, a closed low crossing the state remaining starved of moisture is VERY rare. It will find some moisture.
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#2911 Postby Texas Snowman » Sun Jan 13, 2013 11:59 pm

I don't think the fact that he is AGW means he is biased enough to say it may snow as far south as I-10 out of this system.
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#2912 Postby BigB0882 » Mon Jan 14, 2013 12:06 am

The GFS run does bring the light snow totals awfully close to my area (I-10). This is still 80 or so hours out so maybe it can trend a little more south? We shall see! I am just glad to have stuff to watch this winter.
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Re: Texas Winter 2012-2013

#2913 Postby natlib » Mon Jan 14, 2013 2:07 am

Now isn't this interesting....

Image
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Re: Texas Winter 2012-2013

#2914 Postby TexasF6 » Mon Jan 14, 2013 4:08 am

LOUD SLEET @LONGHORN WX CENTER IN NW AUSTIN!
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Re: Texas Winter 2012-2013

#2915 Postby Portastorm » Mon Jan 14, 2013 5:12 am

I can confirm. It is sleeting at the Portastorm Weather Center. Good gawd where did this come from?!
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Re: Texas Winter 2012-2013

#2916 Postby SaskatchewanScreamer » Mon Jan 14, 2013 5:24 am

Portastorm wrote:I can confirm. It is sleeting at the Portastorm Weather Center. Good gawd where did this come from?!


:uarrow: :lol:

So nice, in this day and age, something slips by and surprises you fellows. :D
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Texas Winter 2012-2013

#2917 Postby BrokenGlassRepublicn » Mon Jan 14, 2013 5:30 am

DP
Last edited by BrokenGlassRepublicn on Mon Jan 14, 2013 6:36 am, edited 1 time in total.
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Texas Winter 2012-2013

#2918 Postby BrokenGlassRepublicn » Mon Jan 14, 2013 5:31 am

Congrats Porta. Just noticed radar returns showing bands of snow forming over Tarrant and Denton counties.
Last edited by BrokenGlassRepublicn on Mon Jan 14, 2013 6:37 am, edited 1 time in total.
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Re: Texas Winter 2012-2013

#2919 Postby ludosc » Mon Jan 14, 2013 5:50 am

Just walked outside...looks like some graupel/large sleet fell recently...

Image

Just west of downtown fort worth


Sent from my Samsung galaxy S3 via tapatalk
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Re: Texas Winter 2012-2013

#2920 Postby MSUDawg » Mon Jan 14, 2013 6:03 am

Same here with grapel/ sleet just south of DFW...(183/360 int)
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