MESOSCALE DISCUSSION 0479
   NWS STORM PREDICTION CENTER NORMAN OK
   0806 PM CDT WED APR 27 2016

   AREAS AFFECTED...PORTIONS OF NORTHEASTERN MISSOURI...SOUTHEASTERN
   IOWA...AND FAR WESTERN IL

   CONCERNING...TORNADO WATCH 116...

   VALID 280106Z - 280230Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 116 CONTINUES.

   SUMMARY...THE REMAINING TORNADO THREAT SHOULD GENERALLY BE CONFINED
   TO NORTHEASTERN PORTIONS OF WW 166. THE THREAT SHOULD CONTINUE TO
   DIMINISH THIS EVENING...AND NEW WW ISSUANCE IS NOT ANTICIPATED.

   DISCUSSION...THE REGIONAL RADAR MOSAIC DEPICTS A BAND OF
   STRONG/SEVERE CONVECTION PUSHING E/NE...IN TANDEM WITH FORCING FROM
   ASCENT AHEAD OF AN IMPULSE ROTATING AROUND THE PERIPHERY OF A
   MID/UPPER-LEVEL LOW OVER NEBRASKA. THE ORIENTATION OF SUCH ASCENT
   WILL GRADUALLY NARROW THE CORRIDOR BETWEEN THE SOUTHERN END OF
   ROBUST CONVECTION AND THE WARM FRONT. AS SUCH...THE WINDOW FOR
   POTENTIAL TORNADOGENESIS /AS WELL AS STRONG STRAIGHT-LINE WINDS/
   SHOULD CONTINUE TO CLOSE OVER THE NEXT FEW HOURS. THEREFORE...WW 166
   WILL LIKELY BE ALLOWED TO EXPIRE AT 02Z...AND ANY SEVERE THREAT
   SHOULD REMAIN LIMITED ENOUGH TO PRECLUDE NEW WATCH ISSUANCE.

   ..PICCA.. 04/28/2016


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

   LAT...LON   39269129 39609235 40199255 40729245 40729211 40149036
               39759020 39239041 39199090 39269129