A quick early morning perusal of the op runs as well as the ensembles continues to show discontinuity between the GFS and King Euro. Are we surprised?! Of course not.
These two images are from the 0z ensemble runs, first showing the GFS and then King Euro. The keys next week for wintry weather for us in Texas, I think, will be where exactly does that West Coast ridging set up and how deep does that trough dig?? Very important to watch.

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ImageShack.usAnd by the way, there are good reasons why some of us are saying that we can't trust the operational model runs for either the GFS or King Euro (oh it pains me to include him in this category!). Read below from HPC and it will explain why.EXTENDED FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER COLLEGE PARK MD
107 AM EST THU JAN 24 2013
VALID 12Z SUN JAN 27 2013 - 12Z THU JAN 31 2013
THE MODELS AND ENSEMBLES SEEM TO REASONABLY SHOW THAT MID-UPPER
LEVEL TROUGHING WORKING INTO THE WRN US THIS WEEKEND WILL AMPLIFY
AS IT PROGRESSES INTO THE WRN-CNTRL CONUS WHILE A RIDGE BUILDS
OVER THE ERN PACIFIC. TELECONNECTIONS RELATIVE TO THE UPSTREAM
RIDGE SUGGESTS SOME ENERGY WITHIN THIS TROUGH MAY BE PULLED SWWD
OVER THE SW US. THIS MAY BRING A BROAD AREA OF MOISTURE AND BELOW
NORMAL DAYTIME TEMPS TO THE WEST AND ULTIMATELY LEAD TO A
SIGNIFICANT WARMING DOWNSTREAM. BY MID-LATE NEXT WEEK THE STEADY
PROGRESSION OF THE WRN TROUGH ENERGIES OUT ACROSS THE CENTRAL AND
ASSOCIATED LEAD FAVORABLE THETA-E ADVECTION INTO/AHEAD OF A WAVY
FRONTAL SYSTEM WILL OFFER POTENTIAL FOR ORGANIZED HEAVIER PCPN
CENTERED OVER THE E-CENTRAL US/SERN US AND EVENTUALLY THE NERN US
WITH A DRIER TREND OVER THE WEST.
WHILE ENSEMBLE MEANS HAVE HELD ONTO A FAIRLY CONSISTENT EVOLUTION
OVER THE CONUS AND VICINITY DURING THE PAST DAY OR SO...
OPERATIONAL MODELS CONTINUE TO DIFFER FROM RUN TO RUN AND AMONG
EACH OTHER WITH RESPECT TO THE DISTRIBUTION OF ENERGY WITHIN THE
MODERATELY PROGRESSIVE AND POSITIVELY TILTED MEAN TROUGH AND WITH
THE SUBSEQUENT SYSTEM/STREAM DOWNSTREAM RESPONSE.
ACCORDINGLY...HPC MEDIUM RANGE SURFACE FRONTS/PRESSURES AND 500 MB
PROGS HAVE BEEN PRIMARILY DERIVED FROM AN ENSEMBLE MEAN
BLEND...LEANING A BIT MORE ON THE SLIGHTLY MORE AMPLIFIED ECMWF
MEAN. THE GFS AND ECMWF ENSEMBLE MEANS ARE COMPATABLE ENOUGH
THOUGH THAT A BLEND STILL MAINTAINS REASONABLE EMBEDDED SYSTEM
DEFINITION THAT SEEMS FAIRLY CONSISTENT WITH LINGERING UNCERTAINTY.
SCHICHTEL