SPC MD 2068

MD 2068 CONCERNING TORNADO WATCH 569... FOR NORTH-CENTRAL AND NORTHEAST TX/SOUTH-CENTRAL INTO SOUTHEAST AND EAST-CENTRAL OK/WEST-CENTRAL AR

MESOSCALE DISCUSSION 2068
NWS STORM PREDICTION CENTER NORMAN OK
0351 PM CST SAT DEC 26 2015

AREAS AFFECTED...NORTH-CENTRAL AND NORTHEAST TX/SOUTH-CENTRAL INTO
SOUTHEAST AND EAST-CENTRAL OK/WEST-CENTRAL AR

CONCERNING...TORNADO WATCH 569...

VALID 262151Z - 262345Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 569 CONTINUES.

SUMMARY...THE THREAT FOR ADDITIONAL TORNADOES CONTINUES ACROSS MUCH
OF WW 569 LATE THIS AFTERNOON INTO THE EARLY EVENING.  MEANWHILE...
THE COLD FRONT HAS BEGUN TO MOVE INTO THE FAR WESTERN PART OF THE
TORNADO WATCH UNDERCUTTING THE STORMS FROM JEFFERSON COUNTY OK TO
STEPHENS COUNTY TX.  HAIL WILL BECOME THE PRIMARY THREAT WITH STORMS
AS THEY ARE UNDERCUT BY THE EAST-SOUTHEASTWARD-ADVANCING COLD FRONT.

DISCUSSION...HEIGHT FALLS INTO THE EARLY EVENING AHEAD OF THE
DEEPENING SOUTHWEST STATES/NORTHERN MEXICO UPPER TROUGH WILL PROVIDE
SUFFICIENT UPWARD VERTICAL MOTION FOR ADDITIONAL STORMS DEVELOPING
ACROSS THE WARM SECTOR.

THE 20Z SURFACE ANALYSIS INDICATED THE COLD FRONT HAS CONTINUED
ADVANCING TO THE EAST/SOUTHEAST THIS AFTERNOON AND EXTENDED FROM
NORTHEAST OK TO EAST AND SOUTH OF THE OKC METRO THROUGH GARVIN TO
JEFFERSON COUNTIES OK...AND THROUGH MUCH OF WESTERN NORTH TX
COUNTIES.  MEANWHILE...THE WARM SECTOR REMAINS QUITE MOIST AND
MODERATELY UNSTABLE WITH SOME BREAKS IN THE CLOUDS HAVING FURTHER
ENHANCED THE DEGREE OF INSTABILITY.  THIS DESTABILIZATION HAS EXPAND
EAST ACROSS MORE OF EAST TX TOWARD THE ARKLATEX...RESULTING IN SOME
EASTWARD EXPANSION OF WW 569 IN NORTHEAST TX.  TRENDS IN THE VWP
DATA FROM CENTRAL TX TO EASTERN OK SHOWED STRENGTHENING SOUTHERLY
WINDS OF 50-KT ATOP SOUTH-SOUTHEAST SURFACE WINDS...MAINTAINING
STRONG LOW-LEVEL SHEAR FOR A CONTINUED TORNADO THREAT.

..PETERS.. 12/26/2015

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...LZK...SHV...TSA...HGX...FWD...OUN...EWX...SJT...

LAT...LON   31489908 32339917 32979890 34179792 34449739 34869703
            35479647 35859611 35809490 35769318 35279336 34129414
            33259463 32359482 31529542 31129582 30419702 30779766
            30949843 31489908 

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