MESOSCALE DISCUSSION 0055
   NWS STORM PREDICTION CENTER NORMAN OK
   1122 PM CST SUN JAN 27 2013
   
   AREAS AFFECTED...PARTS OF THE CNTRL APPALACHIANS TO LK ERIE
   
   CONCERNING...FREEZING RAIN 
   
   VALID 280522Z - 280945Z
   
   SUMMARY...LIGHT SNOW/SLEET WILL TRANSITION TO FREEZING RAIN WITH
   RATES OF 0.02 TO 0.07 IN/HR EXPECTED OVERNIGHT.
   
   DISCUSSION...BROAD SWATH OF LIGHT MIXED PRECIPITATION SHOULD
   CONTINUE TO PROGRESS EWD OVERNIGHT WITHIN A FAVORABLE CORRIDOR OF
   LOW-LEVEL WARM THETA-E ADVECTION DOWNSTREAM OF A 60 KT LLJ OVER THE
   MIDWEST. THIS JET WILL AID IN THE TRANSPORT OF A PRONOUNCED
   ABOVE-FREEZING WARM NOSE SAMPLED BY EVENING RAOBS/AMDAR ATOP A
   NEAR-SURFACE COLD DOME AS WET-BULB EFFECTS HELP MAINTAIN SURFACE
   TEMPERATURES HOLDING STEADY TO SLOWLY RISING JUST BELOW FREEZING. AS
   FULL-COLUMN SATURATION OCCURS...INITIAL LIGHT SNOW/SLEET WILL
   TRANSITION OVER TO A PERIOD OF PREDOMINANTLY FREEZING RAIN BY
   08-10Z.
   
   ..GRAMS.. 01/28/2013
   
   
   ATTN...WFO...BUF...CTP...LWX...RNK...PBZ...RLX...CLE...
   
   LAT...LON   39007877 37997952 37587993 37628043 37808061 38358018
               38937987 39717980 40488008 41928050 42088030 42237975
               42027930 41277880 40287849 39007877