

009 

WWUS20 KWNS 212005

SEL7

SPC WW 212005

ARZ000-LAZ000-MOZ000-MSZ000-TNZ000-220300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 207

NWS STORM PREDICTION CENTER NORMAN OK

300 PM CDT TUE MAY 21 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  EASTERN ARKANSAS

  NORTHEASTERN LOUISIANA

  MISSOURI BOOTHEEL

  NORTHERN MISSISSIPPI

  WESTERN TENNESSEE



* EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 300 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL TORNADOES POSSIBLE

  SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE

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

DYERSBURG TENNESSEE TO 35 MILES SOUTH SOUTHWEST OF GREENWOOD

MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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 201...WW 202...WW

203...WW 204...WW 205...WW 206...



DISCUSSION...THUNDERSTORM ACTIVITY CONTINUES TO SLOWLY INTENSIFY

ALONG AN OUTFLOW BOUNDARY ADVANCING TOWARD THE MISSISSIPPI RIVER.

THE INTERSECTION OF THIS OUTFLOW BOUNDARY...WITH ANOTHER OUTFLOW

BOUNDARY CURRENTLY STALLED/RETREATING NORTHWARD TOWARD THE

MISSISSIPPI/TENNESSEE BORDER COULD PROVIDE THE FOCUS FOR ADDITIONAL

DEVELOPMENT AND UPSCALE GROWTH DURING THE NEXT FEW HOURS.  AN

INCREASINGLY ORGANIZED SEVERE MESOSCALE CONVECTIVE SYSTEM APPEARS

POSSIBLE BY EARLY EVENING...PERHAPS PRECEDED BY ISOLATED DISCRETE

SUPERCELL DEVELOPMENT.



AVIATION...TORNADOES AND 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 24035.





...KERR

