MESOSCALE DISCUSSION 0712
   NWS STORM PREDICTION CENTER NORMAN OK
   0726 PM CDT SAT MAY 05 2007
   
   AREAS AFFECTED...NORTH CENTRAL/NORTHEAST NEB AND CENTRAL/EASTERN SD
   INTO FAR SOUTHWEST MN/NORTHWEST IA
   
   CONCERNING...TORNADO WATCH 236...
   
   VALID 060026Z - 060200Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 236 CONTINUES.
   
   PARTICULARLY DANGEROUS TORNADO WATCH 236 CONTINUES ACROSS NORTH
   CENTRAL/NORTHEAST NEB AND CENTRAL/EASTERN SD INTO FAR SOUTHWEST
   MN/NORTHWEST IA THROUGH 04Z. THREAT FOR LARGE HAIL AND TORNADOES
   CONTINUES...INCLUDING THE POSSIBILITY FOR A STRONG TORNADO OR TWO
   THROUGH MID EVENING...ESPECIALLY ACROSS SOUTHEAST/EAST CENTRAL SD.
   
   SURFACE MESOANALYSIS FEATURES SURFACE LOW ALONG THE SOUTH CENTRAL
   SD/NORTH CENTRAL NEB BORDER...WITH A WARM FRONT GRADUALLY LIFTING
   NORTHWARD ACROSS FAR SOUTHEAST SD INTO WEST CENTRAL IA...WITH
   RELATIVELY STRONG PRESSURE FALLS MAXIMIZED ALONG/NORTH OF THE FRONT.
   A NUMBER OF TORNADOES HAVE ALREADY BEEN REPORTED OVER THE PAST
   SEVERAL HOURS FROM FAR NORTHEAST NEB INTO SOUTHEAST SD...AND
   CONDITIONS WILL REMAIN RIPE FOR TORNADOES/LARGE HAIL OVER THE NEXT
   SEVERAL HOURS...INCLUDING THE POSSIBILITY FOR A STRONG TORNADO OR
   TWO. PRIMARY CONCERN WILL REMAIN IN A GRADUALLY NORTHWARD-SHIFTING
   CORRIDOR ACROSS SOUTHEAST SD INTO EAST CENTRAL SD...IN LOCALES ALONG
   AND JUST NORTH OF THE WARM FRONT. VWP DATA FROM THE SIOUX FALLS
   WSR-88D CONTINUES TO SAMPLE THE STRONGLY VEERED LOW LEVEL WIND
   PROFILES THAT EXIST ACROSS MUCH OF TORNADO WATCH 236...WITH 0-1 KM
   SRH IN EXCESS 500 M2/S2 REMAINING EXTREMELY FAVORABLE FOR LOW LEVEL
   MESOCYCLONES/TORNADOES.
   
   ..GUYER.. 05/06/2007
   
   
   ATTN...WFO...MPX...FSD...OAX...ABR...LBF...UNR...
   
   44990159 45660042 45819906 45739735 45429678 44609607
   42539564 42209645 42369901 42710029 43580115