MESOSCALE DISCUSSION 0394
   NWS STORM PREDICTION CENTER NORMAN OK
   1043 PM CDT SAT APR 09 2011
   
   AREAS AFFECTED...NRN IA/SERN MN
   
   CONCERNING...TORNADO WATCH 116...
   
   VALID 100343Z - 100445Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 116 CONTINUES.
   
   NUMEROUS SUPERCELLS...A FEW TORNADIC...CONTINUE ACROSS NRN IA WITHIN
   STRONG WARM ADVECTION ZONE ALONG WARM FRONT.  THIS ACTIVITY IS
   BEGINNING TO APPROACH THE ERN-MOST EDGE OF WW116 AND WILL SOON
   SPREAD INTO NERN IA WHERE SHEAR PROFILES AND MOISTENING AIRMASS
   SHOULD PROVE ADEQUATE IN MAINTAINING SUPERCELL STRUCTURES AND
   ATTENDANT TORNADO THREAT.  AS A RESULT IT SEEMS REASONABLE TO EXTEND
   THE TORNADO WATCH DOWNSTREAM TO INCLUDE SERN PORTIONS OF SEVERE
   WATCH 118.
   
   ..DARROW.. 04/10/2011
   
   
   ATTN...WFO...DVN...ARX...MPX...DMX...FSD...
   
   LAT...LON   43349620 43789121 42529140 42329348 42479612 43349620