

014 

WWUS20 KWNS 271244

SEL0

SPC WW 271244

ARZ000-OKZ000-272000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 960

NWS STORM PREDICTION CENTER NORMAN OK

635 AM CST SAT DEC 27 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN AND CENTRAL ARKANSAS

       EASTERN OKLAHOMA



EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 635 AM UNTIL

200 PM CST.



TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND

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

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 120 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH NORTHEAST OF

HARRISON ARKANSAS TO 60 MILES WEST SOUTHWEST OF DE QUEEN

ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 956. WATCH NUMBER 956 WILL NOT BE IN EFFECT AFTER

635 AM CST. CONTINUE...WW 957...WW 958...WW 959...



DISCUSSION...BAND OF SUSTAINED TSTMS ALONG CNTRL OK COLD FRONT

EXPECTED TO CONTINUE E INTO WRN AR BY LATE MORNING...AND INTO CNTRL

AR BY EARLY AFTERNOON...AS ASSOCIATED UPR VORT NOW ENTERING W TX

CONTINUES STEADILY EWD.  STRENGTHENING UVV/WIND FIELD AHEAD OF

VORT...AND MODEST SFC HEATING...SHOULD MAINTAIN/ENHANCE ENVIRONMENT

FAVORABLE FOR A FEW EMBEDDED SUPERCELLS.  WEAKLY CONFLUENT LOW LVL

FLOW MAY ALSO SPAWN SEMI-DISCRETE STORMS E OF THE FRONTAL BAND.

STRENGTH OF LOW LVL SHEAR AND QUALITY OF MOISTURE INFLOW WILL

SUPPORT TORNADOES...IN ADDITION TO SMALL BOWS WITH HIGH

WIND/HAIL...GIVEN FAVORABLE STORM MODE AND EVEN MODEST SFC HEATING.



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

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 23050.





...CORFIDI



014 

WWUS20 KWNS 271244

SEL0

SPC WW 271244

ARZ000-OKZ000-272000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 960

NWS STORM PREDICTION CENTER NORMAN OK

635 AM CST SAT DEC 27 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN AND CENTRAL ARKANSAS

       EASTERN OKLAHOMA



EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 635 AM UNTIL

200 PM CST.



TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND

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

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 120 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH NORTHEAST OF

HARRISON ARKANSAS TO 60 MILES WEST SOUTHWEST OF DE QUEEN

ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 956. WATCH NUMBER 956 WILL NOT BE IN EFFECT AFTER

635 AM CST. CONTINUE...WW 957...WW 958...WW 959...



DISCUSSION...BAND OF SUSTAINED TSTMS ALONG CNTRL OK COLD FRONT

EXPECTED TO CONTINUE E INTO WRN AR BY LATE MORNING...AND INTO CNTRL

AR BY EARLY AFTERNOON...AS ASSOCIATED UPR VORT NOW ENTERING W TX

CONTINUES STEADILY EWD.  STRENGTHENING UVV/WIND FIELD AHEAD OF

VORT...AND MODEST SFC HEATING...SHOULD MAINTAIN/ENHANCE ENVIRONMENT

FAVORABLE FOR A FEW EMBEDDED SUPERCELLS.  WEAKLY CONFLUENT LOW LVL

FLOW MAY ALSO SPAWN SEMI-DISCRETE STORMS E OF THE FRONTAL BAND.

STRENGTH OF LOW LVL SHEAR AND QUALITY OF MOISTURE INFLOW WILL

SUPPORT TORNADOES...IN ADDITION TO SMALL BOWS WITH HIGH

WIND/HAIL...GIVEN FAVORABLE STORM MODE AND EVEN MODEST SFC HEATING.



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

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 23050.





...CORFIDI

