

092 

WWUS20 KWNS 211939

SEL7

SPC WW 211939

LAZ000-TXZ000-220100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 37

NWS STORM PREDICTION CENTER NORMAN OK

140 PM CST THU FEB 21 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHWEST LOUISIANA

       PORTIONS OF SOUTHEAST TEXAS



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 140 PM UNTIL

700 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 65 STATUTE

MILES EAST AND WEST OF A LINE FROM 5 MILES EAST SOUTHEAST OF LAKE

CHARLES LOUISIANA TO 25 MILES NORTHEAST OF NATCHITOCHES

LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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.



DISCUSSION...THUNDERSTORMS CONTINUE TO INTENSIFY ALONG AND IN

ADVANCE OF A COLD FRONT AND NORTHWARD-MOVING WARM FRONT. MOISTENING

BOUNDARY LAYER AND SUFFICIENT DEEP-LAYER SHEAR EXISTS FOR SUPERCELLS

AS WELL AS BOWING SEGMENTS. TORNADO POTENTIAL WILL BE RELATIVELY

HIGHEST FOR STORMS IN THE VICINITY OF THE WARM FRONT AND POSSIBLY

WITH MESOVORTICES ASSOCIATED WITH STRONGER BOWING SEGMENTS.



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

400. MEAN STORM MOTION VECTOR 25035.





...HART



530 

WWUS20 KWNS 211939

SEL7

SPC WW 211939

LAZ000-TXZ000-220100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 37

NWS STORM PREDICTION CENTER NORMAN OK

140 PM CST THU FEB 21 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHWEST LOUISIANA

       PORTIONS OF SOUTHEAST TEXAS



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 140 PM UNTIL

700 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 65 STATUTE

MILES EAST AND WEST OF A LINE FROM 5 MILES EAST SOUTHEAST OF LAKE

CHARLES LOUISIANA TO 25 MILES NORTHEAST OF NATCHITOCHES

LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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.



DISCUSSION...THUNDERSTORMS CONTINUE TO INTENSIFY ALONG AND IN

ADVANCE OF A COLD FRONT AND NORTHWARD-MOVING WARM FRONT. MOISTENING

BOUNDARY LAYER AND SUFFICIENT DEEP-LAYER SHEAR EXISTS FOR SUPERCELLS

AS WELL AS BOWING SEGMENTS. TORNADO POTENTIAL WILL BE RELATIVELY

HIGHEST FOR STORMS IN THE VICINITY OF THE WARM FRONT AND POSSIBLY

WITH MESOVORTICES ASSOCIATED WITH STRONGER BOWING SEGMENTS.



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

400. MEAN STORM MOTION VECTOR 25035.





...HART

