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WWUS20 KWNS 110741

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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 28

NWS STORM PREDICTION CENTER NORMAN OK

140 AM CST THU MAR 11 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL...NORTHERN AND EASTERN MISSISSIPPI

       WESTERN TENNESSEE



EFFECTIVE THIS THURSDAY MORNING FROM 140 AM UNTIL 900 AM CST.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

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



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE

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

DYERSBURG TENNESSEE TO 50 MILES SOUTHEAST OF JACKSON MISSISSIPPI.

 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU8).



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...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 25. WATCH NUMBER 25 WILL NOT BE IN EFFECT AFTER 140

AM CST. CONTINUE...WW 27...



DISCUSSION...BROKEN BANDS OF STORMS WITH EMBEDDED SUPERCELLS/LEWPS

EXPECTED TO PERSIST OVER PARTS OF MS AND W TN FOR SEVERAL MORE HOURS

/REF MCD 179/.  LOW-LVL WIND PROFILES AND MOISTURE AVAILABILITY WILL

BE MOST FAVORABLE FOR TORNADOES OVER CNTRL/ERN MS...BUT LARGE SCALE

FORCING FOR ASCENT ALSO MAY MAINTAIN A SVR THREAT FARTHER N INTO

MORE STABLE BOUNDARY LAYER ENVIRONMENT IN W TN.



AVIATION...TORNADOES AND 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 450.

MEAN STORM MOTION VECTOR 25045.





...CORFIDI

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