MESOSCALE DISCUSSION 1801
   NWS STORM PREDICTION CENTER NORMAN OK
   0857 PM CDT SAT JUL 30 2011
   
   AREAS AFFECTED...FAR EASTERN SD/SOUTH-CENTRAL MN TO WESTERN WI
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 705...
   
   VALID 310157Z - 310330Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 705
   CONTINUES.
   
   SEVERE TSTM WATCH 705 CONTINUES UNTIL 06Z...WITH CONTINUED POTENTIAL
   FOR LARGE HAIL/DAMAGING WINDS AND PERHAPS A TORNADO ESPECIALLY
   ACROSS EAST-CENTRAL/SOUTHEAST MN AND EXTREME WEST-CENTRAL WI
   INCLUDING THE TWIN CITIES AREA.
   
   AS OF 0145Z...TWO PERSISTENT SUPERCELLS CONTINUE TO SPREAD
   SOUTHEASTWARD ACROSS SOUTH-CENTRAL/EAST-CENTRAL MN...ONE WEST OF ST
   CLOUD AND THE OTHER NEARING THE CAMBRIDGE AREA...WITH A NEIGHBORING
   CLUSTER OF STORMS OTHERWISE EXTENDING NORTHEASTWARD INTO NORTHWEST
   WI. ESPECIALLY THE AFOREMENTIONED SUPERCELLS WILL CONTINUE TO POSE A
   LARGE HAIL THREAT...WITH POTENTIAL FOR A TORNADO GIVEN THE RESIDUAL
   INFLUENCE OF AN OUTFLOW BOUNDARY AND THE PRESENCE OF A MOIST
   AIRMASS/STRONG INSTABILITY. OTHERWISE...GRADUAL STORM MERGERS/SOME
   DEGREE OF COLD POOL EXPANSION MAY ALSO CONTRIBUTE TO MORE OF A
   DAMAGING WIND THREAT OVER THE NEXT HOUR OR TWO TOWARD THE TWIN
   CITIES AREA/SOUTHEAST MN AND WEST-CENTRAL/NORTHWEST WI.
   
   FARTHER WEST...MODEST MASS CONVERGENCE AND SLIGHT CAPPING AS PER THE
   00Z ABERDEEN OBSERVED SOUNDING SUGGESTS PROSPECTS FOR ADDITIONAL
   DEEP CONVECTIVE DEVELOPMENT ARE LOW...OR AT LEAST REMAIN
   UNCERTAIN...ACROSS SOUTHWEST MN/EASTERN SD.
   
   ..GUYER.. 07/31/2011
   
   
   ATTN...WFO...DLH...ARX...MPX...FSD...ABR...
   
   LAT...LON   44459674 45309673 45909493 45849334 46329237 46599146
               46379046 45359063 45099204 44579269 44379614 44459674