

181 

WWUS20 KWNS 251832

SEL2

SPC WW 251832

ARZ000-LAZ000-MSZ000-TXZ000-CWZ000-260200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 42

NWS STORM PREDICTION CENTER NORMAN OK

1230 PM CST MON FEB 25 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHERN ARKANSAS

       LOUISIANA

       WESTERN MISSISSIPPI

       FAR EASTERN TEXAS

       COASTAL WATERS



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 1230 PM UNTIL

800 PM CST.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 75 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 115 STATUTE

MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH NORTHWEST OF

MONROE LOUISIANA TO 50 MILES SOUTHEAST OF INTRACOASTAL CITY

LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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 41...



DISCUSSION...TSTMS EXPECTED TO INCREASE IN COVERAGE AND STRENGTH

THROUGH EARLY EVE OVER WW AREA AS PRESSURE FALLS AND UPR DIVERGENCE

ASSOCIATED WITH THE CONTINUED ENE ADVANCE OF TX UPR LOW...AND SFC

HEATING...DESTABILIZE AREA ALONG AND N OF DIFFUSE WNW-ESE WARM FRONT

NOW OVER SRN LA. SSW TO SWLY DEEP SHEAR..ALREADY ADEQUATE FOR

SUPERCELLS...SHOULD FURTHER STRENGTHEN TO AOA 60 KTS...WHILE SFC

DEWPOINTS RISE WELL INTO THE 60S F NWD TO NEAR THE LA-AR BORDER.

TORNADO THREAT SHOULD INCREASE WITH TIME AS EXISTING SLIGHTLY

ELEVATED WAA STORMS BECOME ROOTED IN THE BOUNDARY LAYER ACROSS

SRN/CNTRL LA...AND OTHER STORMS ARISE FROM PRE-COLD-FRONTAL

CONFLUENCE ZONE OVER FAR E TX/NW LA. THE STORMS FORMING IN THE

LATTER AREA MAY MERGE INTO A BKN SQLN LATER THIS AFTN...WITH RISK OF

BOWING STRUCTURES/HIGH WIND IN ADDITION TO SVR HAIL/ISOLD TORNADOES.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 22040.





...CORFIDI



568 

WWUS20 KWNS 251832

SEL2

SPC WW 251832

ARZ000-LAZ000-MSZ000-TXZ000-CWZ000-260200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 42

NWS STORM PREDICTION CENTER NORMAN OK

1230 PM CST MON FEB 25 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHERN ARKANSAS

       LOUISIANA

       WESTERN MISSISSIPPI

       FAR EASTERN TEXAS

       COASTAL WATERS



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 1230 PM UNTIL

800 PM CST.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 75 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 115 STATUTE

MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH NORTHWEST OF

MONROE LOUISIANA TO 50 MILES SOUTHEAST OF INTRACOASTAL CITY

LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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 41...



DISCUSSION...TSTMS EXPECTED TO INCREASE IN COVERAGE AND STRENGTH

THROUGH EARLY EVE OVER WW AREA AS PRESSURE FALLS AND UPR DIVERGENCE

ASSOCIATED WITH THE CONTINUED ENE ADVANCE OF TX UPR LOW...AND SFC

HEATING...DESTABILIZE AREA ALONG AND N OF DIFFUSE WNW-ESE WARM FRONT

NOW OVER SRN LA. SSW TO SWLY DEEP SHEAR..ALREADY ADEQUATE FOR

SUPERCELLS...SHOULD FURTHER STRENGTHEN TO AOA 60 KTS...WHILE SFC

DEWPOINTS RISE WELL INTO THE 60S F NWD TO NEAR THE LA-AR BORDER.

TORNADO THREAT SHOULD INCREASE WITH TIME AS EXISTING SLIGHTLY

ELEVATED WAA STORMS BECOME ROOTED IN THE BOUNDARY LAYER ACROSS

SRN/CNTRL LA...AND OTHER STORMS ARISE FROM PRE-COLD-FRONTAL

CONFLUENCE ZONE OVER FAR E TX/NW LA. THE STORMS FORMING IN THE

LATTER AREA MAY MERGE INTO A BKN SQLN LATER THIS AFTN...WITH RISK OF

BOWING STRUCTURES/HIGH WIND IN ADDITION TO SVR HAIL/ISOLD TORNADOES.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 22040.





...CORFIDI

