STORM PREDICTION CENTER...NWS/NCEP...NORMAN OK
   DAY 3 CONVECTIVE OUTLOOK...REF AWIPS GRAPHIC PGWK48 KWNS.
    
   VALID 291200-301200
    
   A SLIGHT RISK OF SEVERE THUNDERSTORMS IS FORECAST ACROSS PORTIONS
   OF THE NRN ROCKIES AND ADJACENT HIGH PLAINS.
   
   
   STRONG SHORTWAVE TROUGH WILL BREAK-DOWN THE UPPER RIDGE OVER THE
   NRN INTERMOUNTAIN REGION INTO THE NRN ROCKIES ON DAY 3.  GFS IS
   BOTH STRONGER AND SLOWER WITH THIS FEATURE IN PLACING THE SHORTWAVE
   TROUGH AXIS OVER WRN ORE/NRN CA BY THURSDAY AFTERNOON...WHILE THE
   ETA SHIFTS THE TROUGH AXIS INTO WRN MT.  REGARDLESS...A SURFACE
   FRONT/WIND SHIFT WILL LIKELY EXTEND GENERALLY E-W ACROSS WY INTO
   CENTRAL ID WITH NORTH OR EASTERLY SURFACE WINDS ACROSS SRN MT.  IN
   ADDITION...MODELS ARE FORECASTING HIGH TEMPERATURES FROM 80-90F
   ACROSS LOWER ELEVATIONS OVER ERN ID/SRN MT/NRN WY DURING THE
   AFTERNOON WHILE SURFACE DEW POINTS HOLD IN THE MID 40S TO MID 50S. 
   THIS WILL SUPPORT MARGINAL TO MODERATE INSTABILITY DURING THE
   AFTERNOON...SUFFICIENT FOR THUNDERSTORM DEVELOPMENT AHEAD OF
   APPROACHING SHORTWAVE TROUGH FROM ERN ID ACROSS SRN MT/NRN WY. 
   DEEP LAYER SHEAR WILL REMAIN STRONG...AND SHOULD SUPPORT HIGH BASED
   SUPERCELLS/ORGANIZED SEVERE CLUSTERS SPREADING EWD THROUGH THE
   EVENING.  ISOLATED STRONG TO SEVERE THUNDERSTORMS MAY ALSO DEVELOP
   BY LATE IN THE DAY ALONG LEE TROUGH FROM SRN MT INTO NERN CO. 
    
   ..EVANS.. 05/27/03
    
   NOTE: THE NEXT DAY 3 OUTLOOK IS SCHEDULED FOR 1200Z