

000 

WWUS20 KWNS 060748

SEL8

SPC WW 060748

ARZ000-MOZ000-061400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 928

NWS STORM PREDICTION CENTER NORMAN OK

145 AM CST THU NOV 6 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN ARKANSAS

       SOUTH CENTRAL MISSOURI



EFFECTIVE THIS THURSDAY MORNING FROM 145 AM UNTIL 800 AM CST.



HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 40

STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES EAST OF VICHY

MISSOURI TO 30 MILES SOUTHWEST OF FLIPPIN ARKANSAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU8).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 927...



DISCUSSION...BROKEN SQLN EXTENDING FROM SW MO INTO E CNTRL OK

EXPECTED TO CONTINUE ENE AT 25-30 KTS...WHILE INDIVIDUAL STORMS

WITHIN IT MOVE NE AT 45 KTS.  ALTHOUGH LINE WILL ENCOUNTER

DIMINISHING LOW LVL MOISTURE WITH EWD EXTENT...LARGE SCALE FORCING

FOR ASCENT WILL INCREASE AS POTENT /90+ KT/ MID LVL SPEED MAX OVER

KS/OK BORDER CONTINUES EWD.  IN ADDITION...OTHER STORMS EXPECTED TO

CONTINUE FORMING AHEAD OF SQLN IN NW AR.  GIVEN STRONG WIND

FIELD...POTENTIAL MAY CONTINUE FOR DMGG WIND GUSTS EWD BEYOND

EXISTING WW 927.  STRONG LOW LVL SHEAR MAY ALSO SUPPORT AN ISOLD

TORNADO.



AVIATION...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 400. MEAN STORM MOTION

VECTOR 23045.





...CORFIDI

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