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000 

WWUS20 KWNS 162022

SEL5

SPC WW 162022

MOZ000-170300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 605

NWS STORM PREDICTION CENTER NORMAN OK

325 PM CDT THU AUG 16 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL MISSOURI



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 325 PM UNTIL

1000 PM CDT.



HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 35

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTH

NORTHWEST OF KNOB NOSTER MISSOURI TO 55 MILES EAST OF JEFFERSON

CITY MISSOURI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 603...



DISCUSSION...THUNDERSTORMS HAVE DEVELOPED ALONG THE STALLED

FRONT/OUTFLOW BOUNDARY BETWEEN SAINT LOUIS AND KANSAS CITY...AND

CONVECTION WILL LIKELY INCREASE IN COVERAGE THROUGH THE

AFTERNOON/EVENING.  STRONG INSTABILITY AND DEEP LAYER BULK SHEAR N

OF THE BOUNDARY ARE SUFFICIENT FOR SUPERCELLS...THOUGH ANY TORNADO

THREAT SHOULD BE LIMITED BY WEAK LOW-LEVEL FLOW.

OTHERWISE...CONVECTION MAY TEND TO GROW UPSCALE INTO A SMALL

MCS...WITH DAMAGING WINDS AND LARGE HAIL THE MAIN SEVERE THREATS.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 30020.





...THOMPSON

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