SWOMCD
SPC MCD 130130
ILZ000-MOZ000-IAZ000-130300-
MESOSCALE DISCUSSION 1739
NWS STORM PREDICTION CENTER NORMAN OK
0830 PM CDT SUN AUG 12 2007
AREAS AFFECTED...S-CNTRL IA / N-CNTRL INTO NERN MO
CONCERNING...SEVERE THUNDERSTORM WATCH 589...
VALID 130130Z - 130300Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 589
CONTINUES.
POTENTIAL FOR DAMAGING WINDS WILL CONTINUE OVER SERN PORTION WW 589
THROUGH 02-03Z...WITH SEVERE THREAT EVENTUALLY DEVELOPING E/SE OF WW
AREA. SHOULD CURRENT CONVECTIVE TRENDS CONTINUE...AN ADDITIONAL WW
WILL BE REQUIRED.
AS OF 0115Z...REGIONAL RADAR IMAGERY INDICATED A MATURE BOW
ECHO...THE LEADING EDGE OF WHICH EXTENDED FROM LUCAS COUNTY IA SWWD
TO GENTRY COUNTY IN NWRN MO. SYSTEM MOTION WAS GENERALLY 300/35-40
KT. INFLOW AIR MASS ACROSS NRN MO REMAINS WARM AND EXTREMELY MOIST
THIS EVENING WITH DEWPOINTS IN THE MID 70S WHICH WHEN COUPLED WITH
MODESTLY STEEP MID-LEVEL LAPSE RATES...IS RESULTING IN A STRONGLY
UNSTABLE AIR MASS WITH MLCAPES OF 3000-4000 J/KG.
PRESENCE OF MATURE STRATIFORM PRECIPITATION REGION AND SAMPLING OF
50KT REAR INFLOW JET AROUND 4 KM AGL EARLIER UPSTREAM AT OMA SUGGEST
THAT COLD POOL SHOULD BE MAINTAINED...EFFECTIVELY ALLOWING SYSTEM TO
CONTINUE FORWARD PROPAGATING SEWD FOR AT LEAST THE NEXT FEW HOURS.
CORRIDORS OF DAMAGING WINDS WILL REMAIN POSSIBLE...ESPECIALLY WITH
BOWING PORTIONS OF MCS.
.MEAD.. 08/13/2007
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ILX...LSX...DVN...DMX...EAX...
41119330 41129301 40409085 40019080 39549121 39339213
39659323 39859388 40199443
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