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WWUS20 KWNS 090107

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SPC WW 090107

ARZ000-MOZ000-090700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 878

NWS STORM PREDICTION CENTER NORMAN OK

705 PM CST TUE NOV 8 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN ARKANSAS

       THE MISSOURI BOOTHEEL



EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 705 PM

UNTIL 100 AM CST.



TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES SOUTHEAST OF LITTLE

ROCK ARKANSAS TO 50 MILES EAST NORTHEAST OF WALNUT RIDGE

ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 876...WW 877...



DISCUSSION...THREAT FOR ISOLD TORNADOES AND LOCALLY DMGG WIND MAY

EXTEND NEWD FROM CNTRL AR INTO THE DELTA REGION AS EXISTING

SUSTAINED STORMS NOW W AND N OF LIT ENCOUNTER STRENGTHENING LLJ /

ASCENT ASSOCIATED WITH OK UPR TROUGH.  WEAK LOW LVL LAPSE RATES WILL

LIMIT COVERAGE...BUT OBSERVED AND FCST HODOGRAPHS SUGGEST POTENTIAL

FOR TORNADOES GIVEN A SUSTAINED STORM.



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

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

400. MEAN STORM MOTION VECTOR 23035.





...CORFIDI

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