MESOSCALE DISCUSSION 0033
   NWS STORM PREDICTION CENTER NORMAN OK
   0118 PM CST THU JAN 30 2003
   
   AREAS AFFECTED...ERN MD/ERN VA DE AND DISTRICT OF COLUMBIA
   
   CONCERNING...PRECIPITATION TRENDS...WINTER PRECIPITATION 
   
   VALID 301918Z - 302315Z
   
   LATEST WATER VAPOR IMAGERY SHOWED A VORT MAX ROTATING AROUND THE
   BASE OF A TROUGH ACROSS TN/KY. AS THIS FEATURE MOVES E/NE...LIFT
   WILL INCREASE ACROSS THE DISCUSSION AREA WITH MODERATE
   PRECIPITATION DEVELOPING. SFC FREEZING LINE CURRENTLY EXTENDS
   FROM AROUND BWI INTO CNTRL VA  THEN EAST TO AROUND WAKEFIELD.
   AREA OF PRECIPITATION WILL MOVE INTO THIS COOLER WEDGE OF
   AIR...RESULTING IN AREAS OF FZRA AND SNOW. 15Z RUC MODEL
   INDICATED AROUND A QUARTER INCH OF PRECIPITATION THROUGH
   00Z...WITH PCPN CONTINUING AFTER 31/00Z. RUC PTYPE ALGORITHM
   SUGGESTS MUCH OF THIS WILL FALL AS SNOW...ALTHOUGH A NARROW BAND
   OF FZRA IS POSSIBLE AS WELL. SNOWFALL RATES MAY OCCASIONALLY
   APPROACH 1"/HR THOUGH THE AFTN/EARLY EVENING.  
   
   ..TAYLOR.. 01/30/2003
   
   
   37197851 38187779 39467636 38607505 37177717 36837798