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WWUS20 KWNS 200315

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ARZ000-MSZ000-TNZ000-201000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 160

NWS STORM PREDICTION CENTER NORMAN OK

1015 PM CDT TUE APR 19 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EXTREME SOUTHEAST ARKANSAS

       NORTHERN MISSISSIPPI

       WESTERN AND MIDDLE TENNESSEE



EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1015 PM

UNTIL 500 AM CDT.



TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE

MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH NORTHWEST OF

NASHVILLE TENNESSEE TO 10 MILES WEST SOUTHWEST OF GREENWOOD

MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...CONTINUE...WW 157...WW 158...WW 159...



DISCUSSION...SCATTERED SEVERE STORMS IN AR ARE CONGEALING INTO

ANOTHER LINEAR CLUSTER...WITH A DEVELOPING BOW ECHO A LITTLE W OF

MEMPHIS.  THIS CONVECTION WILL CONTINUE TO SURGE EWD INTO NRN MS AND

WRN/MIDDLE TN OVERNIGHT...WITH STRONG ASCENT ALONG THE LEADING EDGE

OF THE GUST FRONTS MAINTAINING THE CONVECTION...DESPITE A GRADUAL

INCREASE IN CONVECTIVE INHIBITION.  DAMAGING WINDS CAN BE EXPECTED

WITH THE BOWING SEGMENTS...AND THE STRONGER UPDRAFTS WILL CONTINUE

TO POSE A RISK FOR LARGE HAIL.  A COUPLE OF TORNADOES WILL ALSO BE

POSSIBLE WITH EMBEDDED CIRCULATIONS IN THE LINE...GIVEN THE MOIST

BOUNDARY LAYER AND THE STRONG LOW-LEVEL SHEAR.



AVIATION...TORNADOES AND 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 27045.





...THOMPSON

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