SWOMCD
SPC MCD 080129
SDZ000-080300-
MESOSCALE DISCUSSION 1816
NWS STORM PREDICTION CENTER NORMAN OK
0829 PM CDT FRI AUG 07 2009
AREAS AFFECTED...CNTRL SD
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 080129Z - 080300Z
SEVERE WEATHER THREAT MAY DEVELOP E OF WW 673 PRIOR TO 03Z AND AN
ADDITIONAL WW MAY BE REQUIRED.
SUPERCELL COMPLEX WHICH INITIATED EARLIER OVER LAWRENCE COUNTY WAS
OBSERVED NEAR THE MEADE/PENNINGTON COUNTY LINE AS OF 0118Z. THIS
COMPLEX IS EXHIBITING DISCRETE UPDRAFT PROPAGATION ALONG IMMEDIATE
COOL SIDE OF SECONDARY FRONTAL BOUNDARY SAGGING SWD THROUGH NERN
PENNINGTON INTO HAAKON COUNTIES. CURRENT RUC OBJECTIVE FIELDS AND
SURFACE OBSERVATIONAL DATA INDICATE THAT STORM COMPLEX IS BEGINNING
TO MOVE INTO LOW-LEVEL THETA-E AXIS WHICH EXTENDS FROM NEAR PIR SEWD
THROUGH YKN AND SUX. WHILE REGION WILL REMAIN TO THE W OF NOCTURNAL
LLJ FOCUSED OVER THE MID MO VALLEY...AIR MASS SHOULD SUPPORT A
CONTINUED EWD/SEWD MOTION OF STORMS INTO WRN SD.
00Z RAP SOUNDING INDICATED THE PRESENCE OF RELATIVELY STRONG MID AND
HIGH-LEVEL WIND FIELDS WHICH SHOULD SERVE TO MAINTAIN
SUPERCELLS...PERHAPS TRANSITIONING TO A BOWING SYSTEM CAPABLE OF
HAIL AND DAMAGING WINDS.
..MEAD.. 08/08/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...FSD...ABR...UNR...
LAT...LON 44360251 44720228 45000152 44950088 44870007 44639919
44269904 43919920 43579973 43640090 43700211 44360251
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