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876 

WWUS20 KWNS 072149

SEL3

SPC WW 072149

ARZ000-ILZ000-INZ000-KYZ000-MOZ000-TNZ000-080500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 253

NWS STORM PREDICTION CENTER NORMAN OK

445 PM CDT SAT JUN 7 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  NORTHEAST ARKANSAS

  SOUTHERN AND CENTRAL ILLINOIS

  SOUTHWEST INDIANA

  WESTERN KENTUCKY

  EASTERN AND SOUTHEASTERN MISSOURI

  WESTERN AND MIDDLE TENNESSEE



* EFFECTIVE THIS SATURDAY AFTERNOON FROM 445 PM UNTIL MIDNIGHT

  CDT.



* PRIMARY THREATS INCLUDE...

  A FEW TORNADOES LIKELY

  SCATTERED LARGE HAIL LIKELY WITH ISOLATED VERY LARGE HAIL EVENTS

    TO 2 INCHES IN DIAMETER POSSIBLE

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH LIKELY



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE

MILES EAST AND WEST OF A LINE FROM 60 MILES WEST NORTHWEST OF

MATTOON ILLINOIS TO 60 MILES SOUTHEAST OF JACKSON TENNESSEE.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 252...



DISCUSSION...SCTD TSTMS FORMING LARGELY IN RESPONSE TO SFC HEATING

BENEATH EWD-MOVING MCV/UPR LOW NOW CROSSING THE MS RIVER N OF STL

SHOULD PERSIST THROUGH MID-LATE EVE. AMPLE DEEP SPEED AND

DIRECTIONAL SHEAR WILL BE PRESENT THROUGHOUT WW AREA TO SUPPORT

ASSUMPTION OF SUPERCELL STRUCTURE WITH ANY MORE SUSTAINED UPDRAFTS.

TWO AREAS APPEAR TO HAVE A SOMEWHAT ENHANCED RISK FOR LOW-LVL

MESOCYCLONES AND POSSIBLE TORNADOES: /1/ WITHIN MID-VLY SYSTEM DRY

SLOT FROM NEAR STL EWD INTO CNTRL/SRN IL...AND /2/ WITHIN ZONE OF

STRENGTHENING WAA/MOISTURE TRANSPORT ALONG DIFFUSE WARM FRONT FROM

SRN IL/WRN KY INTO W TN.



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 25030.





...CORFIDI

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