

982 

WWUS20 KWNS 102344

SEL8

SPC WW 102344

ARZ000-LAZ000-OKZ000-TXZ000-110700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 368

NWS STORM PREDICTION CENTER NORMAN OK

640 PM CDT WED JUN 10 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN...CENTRAL AND SOUTHWESTERN ARKANSAS

       NORTHWEST LOUISIANA

       FAR SOUTHEAST OKLAHOMA

       NORTHEAST TEXAS



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 640 PM

UNTIL 200 AM CDT.



HAIL TO 2 INCHES 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 100

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

NORTHEAST OF FLIPPIN ARKANSAS TO 80 MILES SOUTH SOUTHEAST OF

PARIS TEXAS.  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 365...WW 366...WW 367...



DISCUSSION...TWO SEPARATE FORWARD-PROPAGATING/BOW MCS...ONE IN E

CNTRL OK AND THE OTHER NOW OVER THE DFW AREA...EXPECTED TO CONTINUE

GENERALLY ENE AT 40-50 KTS...SUPPORTED IN PART BY ASCENT AHEAD OF

EJECTING SRN STREAM SHORTWAVE TROUGH.  PATTERN OF SFC-BASED

INSTABILITY ACROSS REGION...AND PRESENCE OF EXISTING INDEPENDENT

STORMS IN WAA AREA AHEAD OF BOW...SUGGEST THAT STRONGEST PART OF DFW

COMPLEX SHOULD AFFECT NE TX/FAR SE OK.  PART OF OK BOW LIKELY TO SEE

STRONGEST DEVELOPMENT IS MORE NEBULOUS...GIVEN PASSAGE OF WEAKENING

MCSS IN NRN/NERN AR EARLIER IN THE DAY.



AVIATION...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 25040.





...CORFIDI

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