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Mesoscale Discussion 73
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   MESOSCALE DISCUSSION 0073
   NWS STORM PREDICTION CENTER NORMAN OK
   0253 PM CST MON FEB 16 2015

   AREAS AFFECTED...PORTIONS OF MIDDLE/ERN TN

   CONCERNING...WINTER MIXED PRECIPITATION 

   VALID 162053Z - 170000Z

   SUMMARY...A SUBSTANTIAL ICING EVENT IS ONGOING ACROSS PORTIONS OF
   MIDDLE/ERN TN...WITH THE BACK EDGE OF THE PRECIPITATION SHIELD
   SHIFTING EWD THROUGH LATE AFTERNOON AND EARLY EVENING.

   DISCUSSION...SFC OBSERVATIONS AND MOSAIC RADAR IMAGERY SUGGEST
   WIDESPREAD SUBSTANTIAL ICING CONTINUES...WITH FREEZING RAIN RATES OF
   0.05-0.10 INCH PER HOUR AND SLEET ACCUMULATION RATES LOCALLY
   REACHING ONE-QUARTER INCH PER HOUR. THIS ACTIVITY LIES ALONG A
   CORRIDOR OF ENHANCED WAA ALOFT ABOVE SUB-FREEZING SFC TEMPERATURES
   ACROSS THE MCD AREA. WITH THE ZONE OF STRONGER ASCENT SHIFTING
   EWD...THE BACK EDGE OF THE STEADIER/MORE WIDESPREAD PRECIPITATION IS
   ALSO SHIFTING EWD AROUND 35 KT...PRESENTLY APPROACHING THE NASHVILLE
   AREA. THIS BACK EDGE WILL CONTINUE PROGRESSING EWD INTO THE LATE
   AFTERNOON AND EARLY EVENING HOURS...WITH PRECIPITATION SUBSEQUENTLY
   DECREASING COVERAGE AND INTENSITY.

   ..COHEN.. 02/16/2015


   ATTN...WFO...MRX...OHX...HUN...

   LAT...LON   35888347 35288556 35208783 36498610 36508306 35888347 

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Page last modified: February 17, 2015
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