http://www.spc.noaa.gov/products/md/md0075.html
MESOSCALE DISCUSSION 0075
   NWS STORM PREDICTION CENTER NORMAN OK
   0641 PM CST TUE JAN 16 2007
   
   AREAS AFFECTED...SOUTH CNTRL AND SERN TX
   
   CONCERNING...FREEZING RAIN 
   
   VALID 170041Z - 170545Z
   
   AREAS OF LIGHT TO OCCASIONALLY MDT FREEZING RAIN WILL PERSIST
   THROUGH THE EVENING. PORTIONS OF SERN TX WILL CHANGE FROM -RA TO
   -FZRA WITH MAXIMUM HRLY ACCUMULATION NEAR 0.05".
   
   SURFACE ANALYSIS INDICATES FREEZING LINE IS PROGRESSING SLOWLY SWD
   ACROSS SRN TX. AREAS OF SERN TX FROM LA WARD TO BUNA COUNTIES WILL
   SEE A CHANGEOVER FROM RAIN TO FREEZING RAIN AS BOTH WEAK COLD
   ADVECTION AND EVAPORATIVE COOLING CONTINUE.  THE HEAVIEST
   PRECIPITATION RATES SHOULD REMAIN IN MUCH THE SAME AREAS AS THEY ARE
   AT 00Z...FROM THE NEW BRAUNFELS AREA ENEWD TO NEAR CUT AND SHOOT.
   
   ..JEWELL.. 01/17/2007
   
   
   ...NOTICE...
   SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A
   SCHEDULED BASIS FROM DECEMBER 1 THROUGH FEBRUARY 28...FOUR
   TIMES A DAY...AROUND 00 UTC...06 UTC...12 UTC...AND 18 UTC
   FOR SIGNIFICANT SHORT RANGE WINTER WEATHER EVENTS.
   
   ATTN...WFO...LCH...HGX...FWD...CRP...EWX...