Tornado Watch 39

Issued

Mar 5, 2011, 8:54 AM CST (14:54 UTC)

Expired

Mar 5, 2011, 4:00 PM CST

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

Two or more tornadoes

40%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

10%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 189Mar 5, 8:40 AM CST
• Mesoscale Discussion 190Mar 5, 11:12 AM CST
• Mesoscale Discussion 191Mar 5, 1:31 PM CST

676 
WWUS20 KWNS 051456
SEL9
SPC WW 051456
ALZ000-LAZ000-MSZ000-CWZ000-052200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 39
NWS STORM PREDICTION CENTER NORMAN OK
855 AM CST SAT MAR 5 2011

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

       PARTS OF SOUTHWEST ALABAMA
       LARGE PART OF SOUTHERN LOUISIANA
       PARTS OF SOUTHEAST MISSISSIPPI
       COASTAL WATERS

EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 855 AM UNTIL
400 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 75 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 35 MILES WEST OF
INTRACOASTAL CITY LOUISIANA TO 35 MILES EAST OF MOBILE ALABAMA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU9).

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 ARE INTENSIFYING ACROSS SCENTRAL LA AHEAD
OF TROUGH MOVING EWD ACROSS TX.  AIR MASS EWD ACROSS THE WATCH AREA
IS MOIST AND MDTLY UNSTABLE WITH MLCAPES TO 1000 J/KG.  SHEAR
PROFILES WILL BE INCREASING WITH TIME AS THE TROUGH APPROACHES AND
CONDITIONS ARE ALREADY FAVORABLE FOR SUPERCELLS AS EVIDENT BY THE
STORMS E OF LCH CURRENTLY.  TORNADOES WILL BE POSSIBLE ASSOCIATED
WITH ANY SUPERCELL WITH ACTIVITY DEVELOPING UPSCALE INTO A QLCS BY
THIS AFTERNOON TOWARD SERN MS/SWRN AL.

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 24030.


...HALES

Tornado Watches in Louisiana, 2011Tornado Watches in Mississippi, 2011Tornado Watches in Alabama, 2011Every tornado watch in 2011

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.