

666 

WWUS20 KWNS 271343

SEL1

SPC WW 271343

ARZ000-LAZ000-TXZ000-272000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 961

NWS STORM PREDICTION CENTER NORMAN OK

740 AM CST SAT DEC 27 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHWEST ARKANSAS

       NORTHWEST LOUISIANA

       NORTH CENTRAL AND NORTHEAST TEXAS



EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 740 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 105 STATUTE

MILES EAST AND WEST OF A LINE FROM 15 MILES EAST NORTHEAST OF

PARIS TEXAS TO 10 MILES EAST SOUTHEAST OF TEMPLE TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU1).



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 957...WW 958...WW

959...WW 960...



DISCUSSION...TSTMS EXPECTED TO INCREASE ALONG AND AHEAD OF

EWD-MOVING COLD FRONT IN N TX AS ASSOCIATED UPR VORT...NOW ENTERING

W TX...CONTINUES ENEWD.  ALTHOUGH STRONGEST FORCING FOR ASCENT MAY

PASS N OF THE RED RIVER...COMBINATION OF WEAK SFC HEATING AND WEAKLY

CONFLUENT FLOW EXPECTED TO FOSTER DEVELOPMENT.  STRENGTH OF SHEAR

/0-1 KM VALUES AOA 40 KT/ AND RICH MOISTURE INFLOW SUGGEST POTENTIAL

FOR TORNADOES...DESPITE MODEST MID LVL LAPSE RATES AND LIKELY

QUASI-LINEAR PREDOMINANT CONVECTIVE MODE.



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

450. MEAN STORM MOTION VECTOR 24050.





...CORFIDI



666 

WWUS20 KWNS 271343

SEL1

SPC WW 271343

ARZ000-LAZ000-TXZ000-272000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 961

NWS STORM PREDICTION CENTER NORMAN OK

740 AM CST SAT DEC 27 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHWEST ARKANSAS

       NORTHWEST LOUISIANA

       NORTH CENTRAL AND NORTHEAST TEXAS



EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 740 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 105 STATUTE

MILES EAST AND WEST OF A LINE FROM 15 MILES EAST NORTHEAST OF

PARIS TEXAS TO 10 MILES EAST SOUTHEAST OF TEMPLE TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU1).



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 957...WW 958...WW

959...WW 960...



DISCUSSION...TSTMS EXPECTED TO INCREASE ALONG AND AHEAD OF

EWD-MOVING COLD FRONT IN N TX AS ASSOCIATED UPR VORT...NOW ENTERING

W TX...CONTINUES ENEWD.  ALTHOUGH STRONGEST FORCING FOR ASCENT MAY

PASS N OF THE RED RIVER...COMBINATION OF WEAK SFC HEATING AND WEAKLY

CONFLUENT FLOW EXPECTED TO FOSTER DEVELOPMENT.  STRENGTH OF SHEAR

/0-1 KM VALUES AOA 40 KT/ AND RICH MOISTURE INFLOW SUGGEST POTENTIAL

FOR TORNADOES...DESPITE MODEST MID LVL LAPSE RATES AND LIKELY

QUASI-LINEAR PREDOMINANT CONVECTIVE MODE.



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

450. MEAN STORM MOTION VECTOR 24050.





...CORFIDI

