[MCD] SWOMCD

Mon Jul 24 23:23:33 UTC 2006

ACUS11 KWNS 242321
SWOMCD
SPC MCD 242320 
IAZ000-MNZ000-NEZ000-SDZ000-250045-

MESOSCALE DISCUSSION 1619
NWS STORM PREDICTION CENTER NORMAN OK
0620 PM CDT MON JUL 24 2006

AREAS AFFECTED...SERN SD THROUGH SWRN MN...NWRN IA AND NERN NEB

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 242320Z - 250045Z

THE THREAT FOR ISOLATED DAMAGING WIND AND LARGE HAIL IS EXPECTED TO
SPREAD SEWD THROUGH THE REMAINDER OF SD...SWRN MN INTO PARTS OF NWRN
IA AND NERN NEB. TRENDS ARE BEING MONITORED FOR A POSSIBLE WW.

EARLY THIS EVENING...ISOLATED STRONG TO SEVERE THUNDERSTORMS HAVE
DEVELOPED OVER SERN SD IN VICINITY OF A SURFACE FRONT THAT EXTENDS
FROM SRN MN SWWD THROUGH SRN SD. THE ATMOSPHERE IN THIS REGION HAS
BECOME MODERATELY UNSTABLE WITH MLCAPE FROM 1500 TO 2000 J/KG ALONG
WITH STEEP LAPSE RATES. A BELT OF 35 TO 40 KT NWLY MID LEVEL FLOW
EXISTS ABOVE THE SLY BOUNDARY LAYER FLOW...RESULTING IN SUFFICIENT
VERTICAL SHEAR FOR MID LEVEL UPDRAFT ROTATION. ONSET OF NOCTURNAL
COOLING AND STABILIZING BOUNDARY LAYER COULD SERVE AS A LIMITING
FACTOR. HOWEVER...INTENSIFYING LOW LEVEL JET ACROSS NEB MAY
CONTRIBUTE TO SUFFICIENT LIFT FOR STORMS TO CONTINUE DEVELOPING NEXT
FEW HOURS...ESPECIALLY N OF PRE-EXISTING OUTFLOW BOUNDARIES.

..DIAL.. 07/24/2006

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...MPX...DMX...FSD...OAX...LBF...

42479546 42089777 42999860 44019787 44149510 43489444 

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