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000 

WWUS20 KWNS 100346

SEL4

SPC WW 100346

ARZ000-OKZ000-TXZ000-101100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 184

NWS STORM PREDICTION CENTER NORMAN OK

1040 PM CDT WED APR 9 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN ARKANSAS

       SOUTHERN AND EASTERN OKLAHOMA

       NORTH-CENTRAL AND CENTRAL TEXAS



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 1040 PM

UNTIL 600 AM CDT.



TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 50 MILES WEST OF MINERAL

WELLS TEXAS TO 60 MILES EAST OF MCALESTER OKLAHOMA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU4).



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 179...WW 180...WW

181...WW 182...WW 183...



DISCUSSION...SURFACE LOW OVER THE PERMIAN BASIN WILL DEVELOP NEWD

ALONG RETREATING WARM FRONT INTO S-CNTRL OK OVERNIGHT IN ADVANCE OF

NEGATIVELY-TILTED SHORT WAVE TROUGH EJECTING ENEWD INTO THE SRN HIGH

PLAINS.  AIR MASS ALONG AND S OF RETREATING WARM FRONT IS MOIST AND

MODERATELY UNSTABLE AND VERTICAL WIND SHEAR IS QUITE STRONG INVOF OF

WARM FRONT SWD INTO THE WARM SECTOR.  ONGOING TSTMS OVER WRN TX WILL

RAPIDLY SPREAD EWD/NEWD OVERNIGHT IN ADVANCE OF UPPER TROUGH WITH

THE POTENTIAL FOR EMBEDDED SUPERCELLS CAPABLE OF TORNADOES...LARGE

HAIL AND HIGH WINDS.  ADDITIONAL TORNADIC STORMS MAY DEVELOP IN

ADVANCE OF THIS LARGER CONVECTIVE SYSTEM ALONG RETREATING WARM FRONT

OVER N-CNTRL TX INTO S-CNTRL AND ERN OK.



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

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 24040.





...MEAD/HART

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