MESOSCALE DISCUSSION 0178
   NWS STORM PREDICTION CENTER NORMAN OK
   1248 PM CST WED FEB 20 2013
   
   AREAS AFFECTED...NW/CNTRL/S-CNTRL KS...NE CO...SE NE
   
   CONCERNING...HEAVY SNOW 
   
   VALID 201848Z - 202245Z
   
   SUMMARY...BAND OF HVY SNOW...WITH RATES AROUND 1 INCH PER
   HOUR...WILL CONTINUE MOVING NWD/NEWD ACROSS THE CNTRL PLAINS.
   
   DISCUSSION...SURFACE OBSERVATIONS...SNOWFALL REPORTS...AND RADAR
   IMAGERY INDICATE A BAND OF HVY SNOW CONTINUES FROM S-CNTRL KS NWWD
   INTO NW KS. MODEL GUIDANCE INDICATES WAA/FRONTOGENESIS WILL CONTINUE
   TO SUPPORT THIS BAND FOR THE NEXT SEVERAL HOURS. NRN PORTION OF THIS
   BAND /ACROSS NW KS/ IS MOVING NWD QUICKER THAN THE SRN PORTION OF
   THIS BAND /ACROSS S-CNTRL KS/ IS MOVING SEWD. AS A RESULT...DURATION
   OF HVY SNOW ACROSS S-CNTRL KS MAY BE LONGER THAN AREAS FURTHER
   NE...LEADING TO HIGHER SNOWFALL TOTALS. 
   
   HOWEVER...A DRYING TREND NOTED ON RADAR IMAGERY IS QUICKLY MOVING
   NEWD AND ENDING THE PRECIPITATION AS IT DOES SO. THIS IS LIKELY A
   RESULT OF SUBSIDENCE BEHIND THE SHORTWAVE TROUGH. AS SUCH...A
   DIMINISHING TREND WITHIN THE SNOW BAND IS EXPECTED LATER THIS
   AFTERNOON AS THE SHORTWAVE TROUGH PROGRESSES NEWD INTO THE UPPER MS
   VALLEY AND THE SNOW BAND MOVES NEWD INTO SRN NEB. AS A RESULT...THE
   SNOW BAND WILL LIKELY DIMINISH BEFORE REACHING CNTRL NEB.
   
   ..MOSIER.. 02/20/2013
   
   
   ATTN...WFO...ICT...GID...LBF...DDC...GLD...
   
   LAT...LON   39560220 39990241 40380190 40240052 39359848 38279700
               37869669 37669672 37249725 37859789 38619936 39110104
               39290193 39560220