SWOMCD
SPC MCD 060240
SDZ000-NEZ000-MTZ000-WYZ000-060445-
MESOSCALE DISCUSSION 2039
NWS STORM PREDICTION CENTER NORMAN OK
0940 PM CDT TUE AUG 05 2008
AREAS AFFECTED...SERN MT...NERN WY...WRN SD
CONCERNING...SEVERE THUNDERSTORM WATCH 811...
VALID 060240Z - 060445Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 811
CONTINUES.
THE THREAT FOR LARGE HAIL AND SEVERE WIND GUSTS WILL LIKELY PERSIST
FOR SEVERAL MORE HOURS. MOST OF WW 811 SHOULD REMAIN IN EFFECT
THROUGH EXPIRATION TIME AT 05Z.
INITIAL CONVECTION HAS CREATED A VERY STRONG GUSTY FRONT WITH SEVERE
WINDS NOTED ACROSS WRN SD RECENTLY. WRN PORTIONS OF THIS LINE HAS
REMAINED MORE CELLULAR WITH A HAIL THREAT...LIKELY DUE TO PROXIMITY
OF A STRONGER LOW LEVEL JET AND THE INSTABILITY AXIS. THE SEVERE
THREAT WITH THESE STORMS MAY EXTEND A COUNTY ROW OR TWO E OF THE
WW...WITH LOCAL EXTENSION POSSIBLE. THIS LOW LEVEL JET WILL
STRENGTHEN AND VEER FROM SELY TO SLY WITH TIME...WHICH WILL CONTINUE
A FEED OF UNSTABLE AND RELATIVELY MOIST AIR NWD BENEATH MODERATE
NWLY FLOW ALOFT.
ALTHOUGH SURFACE STABILIZATION HAS OCCURRED IMMEDIATELY BEHIND THE
WRN SD LINE...REDEVELOPMENT CANNOT BE RULED OUT LATER THIS EVENING.
IN ADDITION...STORMS OVER SERN MT MAY PERSIST FOR SOME TIME.
..JEWELL.. 08/06/2008
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ABR...UNR...CYS...BYZ...GGW...RIW...
44650256 43830044 43410031 43090081 43010158 43000296
42980395 43090484 43570542 45030650 46250771 47010802
47280764 46960601 45660394
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