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
   
   
   ATTN...WFO...ILX...LSX...DVN...DMX...EAX...
   
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