MESOSCALE DISCUSSION 2573
   NWS STORM PREDICTION CENTER NORMAN OK
   0635 PM CST FRI DEC 24 2004
   
   AREAS AFFECTED...DEEP SOUTH TX
   
   CONCERNING...WINTER MIXED PRECIPITATION 
   
   VALID 250035Z - 250630Z
   
   A MIXTURE OF SLEET AND SNOW WILL CONTINUE TO INCREASE IN COVERAGE
   AND INTENSITY THROUGH THE EVENING HOURS.  HRLY SNOWFALL RATES AROUND
   0.50 IN/HR ARE EXPECTED.
   
   BROAD AREA OF ISENTROPIC LIFT CONTINUES WITH CONVECTIVE SHOWERS
   BREAKING OUT.  00Z CRP SOUNDING CONFIRMS CONVECTIVE INSTABILITY
   ROOTED NEAR 700 MB WITH SUB-ZERO TEMPERATURES BELOW SO THUNDER
   SLEET/SNOW WILL CONTINUE.
   
   00Z CRP AND BRO SOUNDINGS SHOW WARM LAYER ALOFT NEAR 700 MB...BUT
   THIS LAYER WILL COOL THROUGH THE EVENING AS TROUGH APPROACHES FROM
   WEST.  LOW TO MID LEVEL FRONTOGENETICAL FORCING WILL ALSO INCREASE
   THROUGH THE EVENING AND WILL HELP ORGANIZE PRECIPITATION INTO SW-NE
   ORIENTED BANDS. THE HEAVIEST RATES ARE EXPECTED TO BE FROM 02-05Z
   NRN AND WRN AREAS...AND FROM 05-09Z SERN AREAS INCLUDING BRO.
   
   ..JEWELL.. 12/25/2004
   
   
   ...NOTICE...
   SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A 
   SCHEDULED BASIS...FOUR TIMES A DAY...BETWEEN 00-01 UTC...
   06-07 UTC...12-13 UTC...AND 18-19 UTC AS SIGNIFICANT SHORT
   RANGE WINTER WEATHER EVENTS UNFOLD.  THIS SCHEDULE WILL BE
   USED FROM DECEMBER 1 THROUGH FEBRUARY 28.
   
   ATTN...WFO...CRP...EWX...BRO...
   
   27039927 27399917 28039903 28719825 28749728 28309661
   27429730 26769744 25939718 25969761 26079819 26389892