

523 

WWUS20 KWNS 081935

SEL3

SPC WW 081935

ARZ000-OKZ000-TXZ000-090200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 43

NWS STORM PREDICTION CENTER NORMAN OK

135 PM CST TUE MAR 8 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF SOUTHWEST ARKANSAS

       SOUTHEAST OKLAHOMA

       PARTS OF NORTH CENTRAL AND NORTHEAST TEXAS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 135 PM UNTIL

800 PM CST.



TORNADOES...HAIL TO 2.5 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 60 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHEAST OF

MCALESTER OKLAHOMA TO 85 MILES SOUTH OF PARIS TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU3).



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 42...



DISCUSSION...AIR MASS ALONG AND E OF N/S DRY LINE HAS DESTABILIZED

WITH MLCAPES AOA 1500 J/KG WITH FAVORABLE SHEAR PROFILES IN PLACE

FOR SUPERCELLS.  THUNDERSTORMS ARE DEVELOPING ALONG DRY LINE AND

WILL INCREASE IN NUMBER AND INTENSITY THRU THE AFTERNOON AS THEY

MOVE EWD.  WHILE LARGE HAIL IS LIKELY WITH ANY SUPERCELL...A TORNADO

THREAT IS ALSO EXPECTED GIVEN THE STRONG MID/UPPER SHEAR ACROSS THE

AREA AHEAD OF UPPER TROUGH.



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

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 24030.





...HALES

