SPC MESOSCALE DISCUSSION 0992 FOR PORTIONS NWRN/NCENTRAL NEB...SWRN
   AND SCENTRAL SD
   CONCERNING...SEVERE THUNDERSTORM WATCH 373...
   
   VALID 030245Z - 030400Z
   
   CLUSTER OF SEVERE THUNDERSTORMS CURRENTLY OVER WRN PORTIONS OF WW
   373 MAY CONTINUE TO POSE A SEVERE THREAT BEYOND WW EXPIRATION TIME
   AND POSSIBLY MOVE EAST OF CURRENT WW INTO PORTIONS OF SCENTRAL SD
   AND NCENTRAL NEB AFTER 03/0400Z. THUS A NEW WW MAY BE NEEDED IN THE
   NEXT HOUR OVER SCENTRAL SD AND NCENTRAL NEB.
   
   LATEST RADAR IMAGERY INDICATES TWO SUPERCELLS...ONE OVER NRN FALL
   RIVER/SRN CUSTER COUNTY IN SWRN SD AND THE OTHER OVER DAWES COUNTY
   IN THE NWRN NEB PANHANDLE. BOTH OF THESE STORMS MAY CONTINUE TO
   POSE A THREAT FOR LARGE HAIL/DAMAGING WINDS OVER THE NEXT SEVERAL
   HOURS...AS AIRMASS DOWNSTREAM OF THESE STORMS REMAINS MODESTLY
   UNSTABLE. CURRENT STORM MOTIONS WOULD TAKE THE NRN STORM INTO
   SHANNON COUNTY SD AND THE SRN STORM INTO SHERIDAN COUNTY NEB BY
   03/0400Z. ADDITIONAL ELEVATED CONVECTION...POSSIBLY DEVELOPING DUE
   TO STORMSCALE ENHANCED LOW LEVEL FORCING AHEAD OF DEVELOPING MCS
   MAY BEGIN TO POSE AN ADDITIONAL LARGE HAIL THREAT OVER THE NEXT FEW
   HOURS AS MODEST ELEVATED INSTABILITY/STEEP LAPSE RATES ARE PRESENT
   ACROSS CENTRAL AND ERN SD PER 03/00Z ABR SOUNDING.
   
   ..CROSBIE.. 06/03/02