MESOSCALE DISCUSSION 2112
   NWS STORM PREDICTION CENTER NORMAN OK
   0337 PM CDT MON AUG 18 2008
   
   AREAS AFFECTED...MUCH OF CNTRL OREGON
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 182037Z - 182300Z
   
   STORMS ARE EXPECTED TO INCREASE IN COVERAGE AND INTENSITY THROUGH
   THE AFTERNOON WITH ISOLATED SEVERE HAIL LIKELY. 
   
   CU FIELDS CONTINUE TO INCREASE ACROSS OREGON AS DAYTIME HEATING AND
   UPPER LEVEL COOLING DESTABILIZE THE ATMOSPHERE. SATELLITE IMAGERY
   CLEARLY SHOWS THE LEADING EDGE OF THE UPPER SHORTWAVE TROUGH MOVING
   NEWD ACROSS NRN CA INTO OREGON. ALTHOUGH LOW LEVEL WINDS HAVE VEERED
   TO WLY BEHIND THE SURFACE FRONT...DEEP LAYER FLOW ALOFT IS STRONG
   ENOUGH FOR LONG LIVED CELLS. RELATIVELY COOL MID LEVEL TEMPERATURES
   AND SUFFICIENT MOISTURE WILL RESULT IN HAIL POTENTIAL...WITH MAXIMUM
   SIZES ON THE ORDER OF 1.00-1.75".
   
   ..JEWELL.. 08/18/2008
   
   
   ATTN...WFO...BOI...PDT...MFR...PQR...
   
   42521988 42362139 42082266 42092322 42412337 42972334
   43662295 44672265 45242236 45572155 45672054 45501985
   45131910 44581866 43891873 43401904 42791932