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312 

WWUS20 KWNS 181427

SEL5

SPC WW 181427

ARZ000-ILZ000-INZ000-KYZ000-MOZ000-182200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 125

NWS STORM PREDICTION CENTER NORMAN OK

925 AM CDT THU APR 18 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  CENTRAL AND EASTERN ARKANSAS

  SOUTHERN ILLINOIS

  SOUTHWESTERN INDIANA

  WESTERN KENTUCKY

  SOUTHEASTERN MISSOURI



* EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 925 AM UNTIL

  500 PM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL TORNADOES LIKELY WITH A FEW INTENSE TORNADOES POSSIBLE

  SEVERAL DAMAGING WIND GUSTS LIKELY WITH A FEW SIGNIFICANT GUSTS

    TO 75 MPH POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE

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

MOUNT VERNON ILLINOIS TO 40 MILES SOUTH SOUTHEAST OF HOT SPRINGS

ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 122...WW 123...WW 124...



DISCUSSION...QUASI-LINEAR BAND OF TSTMS WITH EMBEDDED LEWP/BOW

FORMATIONS IS EXPECTED TO PROCEED EWD 20-25 KT ACROSS WW AREA WITH

EMBEDDED ELEMENTS MOVING MORE RAPIDLY NEWD...ROUGHLY 40 KT.  GIVEN

LACK OF CINH EVIDENT IN 12Z LZK RAOB...DEVELOPMENT OF SUPERCELLS

AND/OR LINE SEGMENTS AHEAD OF INITIAL/PRIMARY CONVECTION CANNOT BE

RULED OUT AS WELL.  WARM SECTOR IS FCST TO DESTABILIZE STEADILY

THROUGHOUT DAYLIGHT HOURS IN PRESENCE OF FAVORABLE DEEP SHEAR.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 22040.





...EDWARDS

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