MESOSCALE DISCUSSION 1633
   NWS STORM PREDICTION CENTER NORMAN OK
   0826 PM CDT MON JUL 20 2009
   
   AREAS AFFECTED...PARTS OF CNTRL/ERN KANSAS...NE OK
   
   CONCERNING...TORNADO WATCH 607...
   
   VALID 210126Z - 210300Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 607 CONTINUES.
   
   SCATTERED SEVERE STORMS...INCLUDING SUPERCELLS...ARE ONGOING WITHIN
   LOW-LEVEL WARM FRONTAL ZONE EXTENDING ACROSS WEST CENTRAL/SOUTH
   CENTRAL KANSAS INTO NORTHEAST OKLAHOMA.  WITH THE ONSET OF DIURNAL
   COOLING...THE TENDENCY PROBABLY WILL BE FOR ACTIVITY TO BECOME
   INCREASINGLY BASED IN ELEVATED WARM ADVECTION TO THE NORTH/EAST OF
   THE SURFACE FRONT.  BUT AN INCREASE IN COVERAGE APPEARS LIKELY
   THROUGH 03-05Z...ON THE NOSE OF A 30+ KT SOUTHERLY LOW-LEVEL JET. 
   FORCING ASSOCIATED WITH AN APPROACHING NORTHWESTERLY HIGH LEVEL JET
   STREAK IS EXPECTED TO AID STORM CONSOLIDATION AND UPSCALE GROWTH
   INTO A LARGE STORM CLUSTER.  AND...DEEP LAYER SHEAR ALREADY APPEARS
   SUPPORTIVE OF AN ORGANIZED MESOSCALE CONVECTIVE SYSTEM CAPABLE OF
   GENERATING STRONG SURFACE GUSTS.  IT MAY BE A WHILE YET BEFORE THIS
   OCCURS...ACCOMPANIED BY A SOUTHEASTWARD ACCELERATION INTO
   OKLAHOMA...BUT TRENDS OF THE ONGOING STORM APPROACHING THE CENTRAL
   KANSAS/OKLAHOMA BORDER AREA ARE ALREADY BEING MONITORED FOR
   ADDITIONAL WW OR WWS SOUTH OF WW 607.
   
   ..KERR.. 07/21/2009
   
   
   ATTN...WFO...SGF...TSA...TOP...ICT...OUN...GID...DDC...
   
   LAT...LON   38639895 39249871 39069651 37989565 37389484 36589442
               35959498 35939611 36139677 36679767 37369815 37619820
               38639895