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310 

WWUS20 KWNS 181847

SEL6

SPC WW 181847

ARZ000-LAZ000-MSZ000-190400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 126

NWS STORM PREDICTION CENTER NORMAN OK

145 PM CDT THU APR 18 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  SOUTHEAST ARKANSAS

  NORTHERN LOUISIANA

  SOUTHWEST AND CENTRAL MISSISSIPPI



* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 145 PM UNTIL

  1100 PM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL TORNADOES POSSIBLE

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A FEW VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 95 STATUTE

MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH NORTHWEST OF

GREENWOOD MISSISSIPPI TO 15 MILES SOUTH SOUTHWEST OF NATCHEZ

MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 123...WW 124...WW 125...



DISCUSSION...THE SQUALL LINE ALONG A COLD FRONT APPROACHING THE

LOWER MISSISSIPPI VALLEY IS EXPECTED TO INTENSIFY IN THE PEAK

AFTERNOON HEATING.  AS SURFACE PRESSURE FALLS CONTINUE ACROSS

NORTHEASTERN LOUISIANA THROUGH SOUTHWEST AND CENTRAL

MISSISSIPPI...DISCRETE SUPERCELL DEVELOPMENT IS POSSIBLE AHEAD OF

THE LINE.  SIZABLE...CLOCKWISE CURVED LOW-LEVEL HODOGRAPHS WILL

CONTRIBUTE TO THE RISK FOR TORNADOES...IN ADDITION TO LARGE HAIL.



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

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