

550 

WWUS20 KWNS 100347

SEL7

SPC WW 100347

ARZ000-LAZ000-MOZ000-MSZ000-TNZ000-101000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 127

NWS STORM PREDICTION CENTER NORMAN OK

1050 PM CDT THU APR 9 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHEAST ARKANSAS

       NORTHEAST LOUISIANA

       EXTREME SOUTHEAST MISSOURI

       NORTHWEST MISSISSIPPI

       WESTERN TENNESSEE



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 1050 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 60 STATUTE

MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHWEST OF

DYERSBURG TENNESSEE TO 55 MILES EAST SOUTHEAST OF MONROE

LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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 125...WW 126...



DISCUSSION...LINE OF SEVERE STORMS IN CENTRAL/NRN AR WILL LIKELY

PERSIST AND SPREAD E OF THE MS RIVER OVERNIGHT...IN CONJUNCTION WITH

THE EWD PROGRESS OF THE STRONG MID LEVEL TROUGH NOW MOVING OVER WRN

AR.  FARTHER S...MORE DISCRETE STORMS HAVE BEEN THE PRIMARY

CONVECTIVE MODE FROM CENTRAL/SRN AR INTO NRN LA.  THE ENVIRONMENT

WILL STILL BE FAVORABLE FOR SUPERCELLS OVERNIGHT AS LOW-LEVEL

MOISTURE INCREASES SLOWLY AND STEEP LAPSE RATES WITH THE MID LEVEL

TROUGH SPREAD EWD.  DAMAGING WINDS AND LARGE HAIL SHOULD BE THE MOST

COMMON THREATS...THOUGH AN ISOLATED TORNADO OR TWO WILL STILL BE

POSSIBLE GIVEN 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

450. MEAN STORM MOTION VECTOR 27035.





...THOMPSON

