MESOSCALE DISCUSSION 1334
   NWS STORM PREDICTION CENTER NORMAN OK
   1022 PM CDT MON JUN 20 2011
   
   AREAS AFFECTED...PARTS OF SRN MN...IA...W CNTRL AND NRN MO
   
   CONCERNING...TORNADO WATCH 526...528...
   
   VALID 210322Z - 210445Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 526...528...CONTINUES.
   
   A NEW WW MAY BE NEEDED TO INCLUDE AREAS EAST OF WW 526 WITHIN THE
   NEXT COUPLE OF HOURS.
   
   DAMAGING WIND GUSTS REMAIN POSSIBLE ALONG SQUALL LINE GUST
   FRONT...ISOLATED TORNADOES ARE NOT OUT OF THE QUESTION...
   PARTICULARLY NEAR THE GUST FRONT/WARM FRONT INTERSECTION.
   
   ALTHOUGH THE ONGOING SQUALL LINE APPEARS PAST PEAK INTENSITY...
   VIGOROUS NEW CONVECTIVE DEVELOPMENT PERSISTS ALONG ITS EASTWARD
   ADVANCING COLD POOL.  SOUTHERLY MID-LEVEL FLOW TO THE EAST OF THE
   CENTRAL PLAINS UPPER LOW IS CERTAINLY NOT MAXIMIZING FORWARD
   PROPAGATION...BUT NEAR SURFACE EASTERLY SYSTEM-RELATIVE FLOW IS AT
   LEAST MODESTLY STRONG /ON THE ORDER OF 30 KT/...EITHER SIDE OF A
   WARM FRONT EXTENDING ACROSS CENTRAL IOWA.  WITH INFLOW FROM THE VERY
   MOIST WARM SECTOR REMAINING MODERATELY UNSTABLE...IT APPEARS THAT
   THE SQUALL LINE MAY MAINTAIN AT LEAST ITS CURRENT INTENSITY INTO THE
   VICINITY OF A KIRKSVILLE MO/WATERLOO IA...PERHAPS ROCHESTER
   MN...LINE BY 06-08Z.
   
   ..KERR.. 06/21/2011
   
   
   ATTN...WFO...DVN...ARX...MPX...DMX...EAX...FSD...
   
   LAT...LON   42949553 43579549 44099410 43899233 42649161 41509172
               40279241 39299312 38929385 38999478 40659437 41989442
               42949553