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Mesoscale Discussion 2255
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   MESOSCALE DISCUSSION 2255
   NWS STORM PREDICTION CENTER NORMAN OK
   0711 PM CDT FRI SEP 12 2008
   
   AREAS AFFECTED...EAST CENTRAL KS/WEST CENTRAL MO
   
   CONCERNING...TORNADO WATCH 899...
   
   VALID 130011Z - 130145Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 899 CONTINUES.
   
   TORNADO WATCH 899 CONTINUES UNTIL 03Z...WITH A CONTINUED RISK FOR
   TORNADOES AND PERHAPS ISOLATED WIND DAMAGE.
   
   SCATTERED SMALL SUPERCELLS...WITH HISTORY OF TORNADOES/FUNNEL
   CLOUDS...WILL CONTINUE TO POSE A TORNADO RISK ESPECIALLY FROM THE
   SOUTHERN/EASTERN KC METRO INTO WEST CENTRAL MO OVER THE NEXT FEW
   HOURS...GENERALLY EITHER SIDE OF THE I-70 CORRIDOR. THIS ACTIVITY IS
   OCCURRING WITHIN A WEST-EAST ORIENTED DIFFERENTIAL HEATING AIDED
   BAROCLINIC ZONE...WHERE A VERY MOIST TROPICAL AIRMASS /LOWER 70S F
   DEWPOINTS/ AND AMPLE LOW LEVEL SHEAR/SRH WILL REMAIN CONDUCIVE FOR
   LOW LEVEL MESOCYCLONES. LATEST WSR-88D DERIVED WINDS FROM KANSAS
   CITY IMPLY AROUND 200 M2/S2 OF 0-1 KM SRH. EVEN WITH A NOCTURNALLY
   INCREASING SOUTHERLY LOW LEVEL JET...CURRENT EXPECTATIONS ARE FOR
   THE TORNADO THREAT TO BEGIN TO GRADUALLY DECREASE THROUGH THE
   01Z-02Z TIMEFRAME. EVEN WITH A VERY MOIST BOUNDARY LAYER...MODEST
   COOLING WITH SUNSET SHOULD SUFFICIENTLY DECOUPLE THE BOUNDARY LAYER
   FOR A DIMINISHING TORNADO RISK THROUGH MID EVENING.
   
   ..GUYER.. 09/13/2008
   
   
   ATTN...WFO...SGF...EAX...TOP...ICT...
   
   38009600 38729559 39529358 39459269 39219248 38629297
   38129440 
   
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Page last modified: September 13, 2008
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