SPC MESOSCALE DISCUSSION 1692 FOR SWRN NEB NEWD INTO SERN SD 
CONCERNING...SEVERE THUNDERSTORM POTENTIAL...

VALID 292200Z - 302300Z

MONITORING PORTIONS OF CENTRAL NEB/SERN SD FOR A POSSIBLE WW.

HIGH BASED THUNDERSTORM THAT DEVELOPED EARLIER OVER THE WRN NEB
PANHANDLE HAS MOVED EWD AND INTERCEPTED DEEPER BOUNDARY MOISTURE
AND HAS BECOME SEVERE. CUMULUS CLOUDS HAVE ALSO BEGUN TO DEVELOP
ALONG THE FRONTAL BOUNDARY FROM NEAR MHN NEWD TO WEST OF MHE IN
SERN SD. AIR MASS TO THE SOUTH OF THE BOUNDARY IS EXTREMELY
UNSTABLE WITH MLCAPES FROM 3500-4500 J/KG. VAD WIND PROFILES
INDICATE THAT A SPEED MAX IS MOVING EWD OUT OF SERN WY AND THIS MAY
AID IN INITIATION NEAR SURFACE BOUNDARY WITHIN THE NEXT HOUR OR SO.
IF IT BECOMES MORE APPARENT THAT MORE STORMS ARE LIKELY TO DEVELOP
ALONG THE FRONT ACROSS CENTRAL NEB/SERN SD...A WW WILL BE REQUIRED.

..IMY.. 07/29/01