SPC MESOSCALE DISCUSSION 1521 FOR WRN NEB
CONCERNING...SEVERE THUNDERSTORM POTENTIAL...

VALID 152222Z - 160100Z

STORMS ARE EXPECTED TO DEVELOP AND INTENSIFY ACROSS WRN NEB NEXT
FEW HOURS. AREA WILL CONTINUE TO BE MONITORED FOR POSSIBLE WW.

ATMOSPHERE HAS DESTABILIZED IN A RELATIVELY NARROW CORRIDOR ACROSS
WRN NEB ALONG AND E OF LEE SURFACE TROUGH WHERE SURFACE HEATING...
DEWPOINTS IN THE UPPER 60S AND STEEP LAPSE RATES ARE CONTRIBUTING
TO MLCAPES FROM 1500 TO 2500 J/KG. VISIBLE SATELLITE SHOWS SEVERAL
SMALLER SCALE BOUNDARIES ACROSS WRN NEB WHICH IN ADDITION TO LEE
TROUGH WILL PROVIDE FOCI FOR CONVECTIVE DEVELOPMENT. WV IMAGERY
INDICATES UPPER SPEED MAX LIFTING NEWD THROUGH THE CNTRL ROCKIES
TOWARD THE HIGH PLAINS. THIS FEATURE MAY ENHANCE DEEP LAYER SHEAR
ENOUGH TO SUPPORT STORM ORGANIZATION...INCLUDING POTENTIAL FOR
ISOLATED SUPERCELLS WITH LARGE HAIL AND DAMAGING WIND THE PRIMARY
THREATS.

..DIAL.. 07/15/01