MESOSCALE DISCUSSION 1999
   NWS STORM PREDICTION CENTER NORMAN OK
   0600 AM CDT TUE OCT 26 2010
   
   AREAS AFFECTED...SRN WI/SRN LOWER MI/ERN IL/INDIANA/WRN OH/SERN
   MO/ERN AR/WRN AND CENTRAL KY/NRN MS/WRN AND MIDDLE TN/NWRN AL
   
   CONCERNING...TORNADO WATCH 719...720...721...
   
   VALID 261100Z - 261300Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH
   719...720...721...CONTINUES.
   
   ARCING BAND OF STRONG/SEVERE STORMS CONTINUES MOVING RAPIDLY
   EWD/ENEWD ACROSS THE MID AND UPPER MS VALLEY REGION AND
   VICINITY...ALONG THE SURFACE COLD FRONT ASSOCIATED WITH A VERY
   STRONG UPPER SYSTEM CENTERED OVER MN/IA/MO ATTM.  A MOIST
   PRE-FRONTAL BOUNDARY LAYER IS SUPPORTING MODEST INSTABILITY --
   FUELING THE ONGOING STORMS...WHILE VERY STRONG FLOW FIELD THROUGH
   THE ENTIRE TROPOSPHERE IS AIDING IN STORM ORGANIZATION/INTENSITY. 
   CONVECTION HAS REMAINED LARGELY CONFINED TO THE FRONTAL BAND -- AND
   THUS MAIN SEVERE THREAT REMAINS DAMAGING WINDS.  HOWEVER...WITH
   SHEAR SUPPORTIVE OF UPDRAFT ROTATION...THREAT FOR ISOLATED TORNADOES
   WILL PERSIST EARLY THIS MORNING -- AND MAY INCREASE THROUGH MIDDAY
   AS POTENTIAL FOR MORE WIDESPREAD PRE-FRONTAL CELLULAR CONVECTION
   INCREASES.
   
   WITH THE MOST EWD PORTION OF THE ARCING BAND OF STORMS -- NOW MOVING
   INTO THE LOWER OH VALLEY REGION -- SHIFTING EWD AT 40 KT...STORMS
   WILL NEAR THE ERN FRINGE OF TORNADO WATCHES 720 AND 721 AROUND 13Z. 
   THIS WILL REQUIRE NEW WATCH ISSUANCE WITHIN THE NEXT 1-2 HOURS.
   
   ..GOSS.. 10/26/2010
   
   
   ATTN...WFO...CLE...JKL...ILN...DTX...LMK...IWX...GRR...OHX...
   IND...BMX...HUN...PAH...GRB...LOT...ILX...MKX...MEG...LSX...DVN...
   ARX...LZK...
   
   LAT...LON   42649050 43589116 43978821 43758474 43028432 41748331
               40128282 38608324 36688476 34228723 34119261 35179151
               37678949 39778900 41608982 42649050