MESOSCALE DISCUSSION 1650
   NWS STORM PREDICTION CENTER NORMAN OK
   0922 PM CDT SAT AUG 04 2007
   
   AREAS AFFECTED...PORTIONS OF WRN AND CENTRAL IA
   
   CONCERNING...TORNADO WATCH 564...
   
   VALID 050222Z - 050315Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 564 CONTINUES.
   
   SURFACE LOW WAS LOCATED IN EXTREME SERN SD...WITH A WARM FRONT
   STRETCHING SEWD ACROSS IA...FROM NORTH OF SUX TO NEAR OTM. A BAND OF
   STRONG STORMS WERE LOCATED EAST OF THE LOW AND NEAR THE WARM FRONT
   EAST OF SUX TO FOD. ALTHOUGH THE LOW/MID LEVEL SHEAR REMAINS
   FAVORABLE FOR SUPERCELLS AND POSSIBLY EVEN A TORNADO...BOUNDARY
   LAYER COOLING HAS RESULTED IN THE STORMS TO BE SLIGHTLY DECOUPLED
   FROM THE BOUNDARY LAYER. A LOW THREAT OF SEVERE STORMS WILL EXIST
   WITH ANY STORMS THAT DEVELOP IN THE STRONGLY SHEARED ENVIRONMENT...
   THOUGH THE THREAT WILL BE LOW UNLESS A STORM IS ABLE TO TAP INTO THE
   MOIST BOUNDARY LAYER.
   
   ..IMY.. 08/05/2007
   
   
   ATTN...WFO...DMX...FSD...OAX...
   
   41479242 41459504 42819611 42969599 43259459 42439337