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WWUS20 KWNS 162204

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ARZ000-LAZ000-MSZ000-TNZ000-170200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 177

NWS STORM PREDICTION CENTER NORMAN OK

505 PM CDT SUN MAY 16 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN AND SOUTHERN ARKANSAS

       NORTHEAST LOUISIANA

       WESTERN MISSISSIPPI

       SOUTHWEST TENNESSEE



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 505 PM UNTIL 900

PM CDT.



HAIL TO 2 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 65

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES EAST

NORTHEAST OF JONESBORO ARKANSAS TO 75 MILES SOUTH SOUTHWEST OF

GREENVILLE MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH

SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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 176...



DISCUSSION...CLUSTERS AND LINES OF THUNDERSTORMS CURRENTLY OVER AR

WILL TRACK EAST-SOUTHEASTWARD ACROSS WATCH AREA THROUGH THE

REMAINDER OF THE AFTERNOON AND EARLY EVENING.  MODERATE INSTABILITY

COUPLED WITH FAVORABLE DEEP LAYER EFFECTIVE SHEAR WILL PROMOTE THE

RISK OF LARGE HAIL AND DAMAGING WINDS IN THE STRONGER CELLS.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 28025.





...HART

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