MESOSCALE DISCUSSION 0102
   NWS STORM PREDICTION CENTER NORMAN OK
   0303 PM CST WED FEB 09 2011
   
   AREAS AFFECTED...NERN LA...ERN AR...CNTRL/NRN MS...SWRN TN...NWRN AL
   
   CONCERNING...HEAVY SNOW 
   
   VALID 092103Z - 100130Z
   
   SNOW WILL CONTINUE SHIFTING EWD ACROSS THE ARKLAMISS REGION AND
   MID-SOUTH THROUGH LATE AFTERNOON INTO EARLY EVENING...WITH RATES OF
   1 INCH PER HOUR EXPECTED.
   
   MOIST ISENTROPIC ASCENT ATOP AN ARCTIC AIR MASS ADVANCING INTO THE
   LOWER MISSISSIPPI VALLEY WILL CONTINUE TO SUPPORT THE EWD SHIFT OF
   PRECIPITATION INTO THIS EVENING. PRECIPITATION WILL CHANGE FROM RAIN
   TO SNOW ACROSS SERN PORTIONS OF THE DISCUSSION AREA AS WET-BULB
   SURFACE TEMPERATURE READINGS FALL AOB FREEZING...WITH THE RAIN-SNOW
   LINE LIKELY EXTENDING FROM 35 SW HSV TO 30 ENE JAN TO 35 ESE MLU BY
   00Z PER THE 18Z RUN OF THE EXPERIMENTAL HRRR. SNOWFALL RATES ARE
   EXPECTED TO INTENSIFY TO 1 INCH PER HOUR...AS AN AXIS OF DEEPER
   MOISTURE TRAVERSES THE AREA. THE HIGHEST SNOWFALL RATES WILL BE MOST
   LIKELY ALONG AND SOUTH OF THE HIGHWAY 82 CORRIDOR...WHERE THE NAM
   MODEL INDICATES 800-700-MB FRONTOGENESIS INCREASING AFTER 00Z IN
   CONJUNCTION WITH INCREASING SLANTWISE INSTABILITY AND PWAT VALUES OF
   0.70 TO 0.80 INCH.
   
   ..COHEN/BROYLES.. 02/09/2011
   
   
   ATTN...WFO...OHX...BMX...HUN...MEG...JAN...LZK...
   
   LAT...LON   34748708 33028851 32179089 32689161 34129099 35378933
               35518786 34748708