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225 

WWUS20 KWNS 041308

SEL6

SPC WW 041308

ARZ000-ILZ000-KYZ000-MOZ000-MSZ000-TNZ000-042000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 726

NWS STORM PREDICTION CENTER NORMAN OK

805 AM CDT THU AUG 4 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST ARKANSAS

       FAR SOUTHERN ILLINOIS

       FAR WESTERN KENTUCKY

       SOUTHEAST MISSOURI

       NORTHERN MISSISSIPPI

       WEST TENNESSEE



EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 805 AM UNTIL

300 PM CDT.



HAIL TO 1 INCH 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 90

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES NORTH OF

WEST PLAINS MISSOURI TO 45 MILES EAST OF JACKSON TENNESSEE.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 725...



DISCUSSION...S CNTRL MO MCS EXPECTED TO MOVE/DEVELOP ESE TO SE

THROUGH LATER THIS MORNING.  WHILE NRN PART OF SYSTEM HAS WEAKENED

SOME IN THE PAST HOUR...COMBINATION OF SFC HEATING TO ITS E/SE...AND

WHAT APPEARS TO BE A FAVORABLE WIND PROFILE FOR ADDITIONAL FORWARD

PROPAGATION /PER PAH VWP/ SUGGEST THAT SYSTEM MAY INTENSIFY LATER

THIS MORNING.  COMBINATION OF HI PWS AND 40+ KT DEEP SHEAR MAY

SUPPORT BOWING SEGMENTS WITH DMGG WIND AND POSSIBLY MARGINALLY SVR

HAIL.  OTHER MORE LOOSELY ORGANIZED STORMS MAY FORM A BIT LATER

ALONG STALLED OUTFLOW BOUNDARY IN W TN.  THESE TOO MAY YIELD LOCALLY

DMGG WIND FROM PRECIP LOADING.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

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

VECTOR 30025.





...CORFIDI

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