MESOSCALE DISCUSSION 0019
   NWS STORM PREDICTION CENTER NORMAN OK
   1222 PM CST SAT JAN 17 2004
   
   AREAS AFFECTED...ERN IND...CENTRAL/SRN OHIO...NRN WV...SWRN PA
   
   CONCERNING...PRECIPITATION TRENDS...WINTER PRECIPITATION 
   
   VALID 171822Z - 172345Z
   
   FREEZING RAIN AND SLEET WILL CONTINUE TO OVERSPREAD THE AREA AND
   SHOULD INCREASE IN INTENSITY OVER THE NEXT 2-4 HOURS. HOURLY LIQUID
   ACCUMULATION RATES AROUND 0.05 IN. WILL BE POSSIBLE FOR A SEVERAL
   HOUR PERIOD ALONG A 30-50 MILE WIDE AXIS FROM ROUGHLY MUNCIE IND EWD
   INTO FAR SWRN PA/WV PANHANDLE THROUGH 18/00Z. 
   
   SATELLITE/RADAR IMAGERY INDICATES A SHEARED SHORTWAVE TROUGH OVER
   CENTRAL IL MOVING EWD. TIGHTENING MID/UPPER LEVEL GRADIENT BETWEEN
   THIS SHORTWAVE AND THE UPPER LOW OVER THE NRN GREAT LAKES WILL AID
   IN A STRENGTHENING UPPER LEVEL JET OVER THE REGION AND INCREASING
   UPPER DIVERGENCE IN THE RIGHT ENTRANCE REGION THROUGH THE AFTERNOON.
   THIS SHOULD MAINTAIN/OR STRENGTHEN AN AREA OF MODERATE PRECIPITATION
   AS IT MOVES EWD ACROSS ECENTRAL/SERN IND INTO SRN/CENTRAL OHIO AND
   FAR NRN WV/SWRN PA. LOW LEVEL WARM ADVECTION WILL CONTINUE TO AID IN
   A GRADUAL NWD SHIFT OF THE SURFACE FREEZING LINE EXTENDING FROM
   BLOOMINGTON IND SEWD TO NEAR CINCINNATI AT 18Z.  LOW LEVEL WARM
   ADVECTION WILL ALSO AID IN A CONTINUED NEWD SHIFT OF THE FREEZING
   RAIN/SLEET/SNOW LINE. BY 00Z...THE FREEZING RAIN/SLEET/SNOW LINE
   SHOULD EXTEND FROM COLUMBUS ESEWD TO MORGANTOWN WV WITH THE
   RAIN/FREEZING RAIN LINE EXTENDING FROM MUNCIE TO NEAR ELKINS.
   
   ..CROSBIE.. 01/17/2004
   
   
   ATTN...WFO...PBZ...RLX...CLE...ILN...IWX...IND...
   
   38878382 39318553 41078556 40508273 39908006 38758035