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Mesoscale Discussion 9
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   MESOSCALE DISCUSSION 0009
   NWS STORM PREDICTION CENTER NORMAN OK
   0958 AM CST TUE JAN 07 2014

   AREAS AFFECTED...E SHORE OF LAKE ONTARIO

   CONCERNING...HEAVY SNOW 

   VALID 071558Z - 072000Z

   SUMMARY...ONTARIO LAKE BAND WILL MOVE LITTLE TODAY...BUT INTENSITY
   SHOULD BEGIN TO WANE BY THIS EVENING/OVERNIGHT AS INVERSION HEIGHTS
   LOWER AND BAND DEPTH DECREASES.

   DISCUSSION...THE CORE OF THE COLDEST AIR IN THE LOW-MID TROPOSPHERE
   IS NOW OVER THE LOWER GREAT LAKES...WITH THE INVERSION HEIGHT NEAR
   700 MB PER 12Z BUF AND ALB SOUNDINGS.  INVERSION HEIGHTS ARE
   EXPECTED TO LOWER WITH TIME FROM SW-NE AS THE PRIMARY LOBE OF
   COLDEST AIR PIVOTS NEWD AND WARMING ALOFT COMMENCES.  THIS WILL
   BEGIN TO REDUCE THE DEPTH OF THE CONVECTIVE PLUME OFF ERN LAKE
   ONTARIO...AND SNOWFALL RATES WILL LIKEWISE BEGIN TO DECREASE BY THIS
   EVENING INTO TONIGHT.  UNTIL THEN...ONLY MINOR WOBBLES ARE EXPECTED
   WITH THE MAIN LAKE BAND...AND HOURLY SNOWFALL RATES SHOULD STILL
   EXCEED 2 INCHES PER HOUR ACROSS JEFFERSON COUNTY NY.  TEMPERATURES
   IN THE SINGLE DIGITS THIS AFTERNOON AND 20-35 KT WSWLY-WLY WINDS
   WILL PROMOTE SUBSTANTIAL BLOWING AND DRIFTING OF SNOW.

   ..THOMPSON.. 01/07/2014


   ATTN...WFO...BUF...

   LAT...LON   44037629 44107575 44107535 44027518 43817526 43757550
               43677624 43687674 43787685 43907681 44037629 

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Page last modified: January 07, 2014
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