Tornado Watch 95

Issued

Apr 11, 2013, 8:00 AM CDT (13:00 UTC)

Expired

Apr 11, 2013, 4:00 PM CDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 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

30%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

5%

One or more hailstones of 2 inches or more

10%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 441Apr 11, 6:55 AM CDT
• Mesoscale Discussion 442Apr 11, 10:41 AM CDT
• Mesoscale Discussion 443Apr 11, 12:53 PM CDT

760 
WWUS20 KWNS 111301
SEL5  
SPC WW 111301
LAZ000-MSZ000-CWZ000-112000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 95
NWS STORM PREDICTION CENTER NORMAN OK
800 AM CDT THU APR 11 2013

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

       SOUTHEAST LOUISIANA
       SOUTHERN MISSISSIPPI
       COASTAL WATERS

EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 800 AM UNTIL
300 PM CDT.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE
MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH NORTHWEST OF
PINE BELT MISSISSIPPI TO 35 MILES WEST SOUTHWEST OF HOUMA
LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

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...TSTMS ARE EXPECTED TO GRADUALLY INCREASE ACROSS THE
WATCH AREA THIS MORNING AS FORCING FOR ASCENT STRENGTHENS AHEAD OF
SHORT-WAVE TROUGH APPROACHING FROM SRN TX.  CONTINUED
HEATING/MOISTENING OF THE PRE-FRONTAL BOUNDARY LAYER SHOULD
GRADUALLY REMOVE THE CAP OBSERVED BY THE 12Z REGIONAL
SOUNDINGS...YIELDING MLCAPE OF 1000-2000 J/KG.  WHEN COUPLED WITH
MODERATELY STRONG LOW-LEVEL AND DEEP-LAYER SHEAR /SEE 12Z JAN
SOUNDING/...THE SETUP WILL SUPPORT A MIXTURE OF BOWING AND SUPERCELL
STRUCTURES CAPABLE OF DAMAGING WINDS AND A FEW TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 24030.


...MEAD

Tornado Watches in Mississippi, 2013Tornado Watches in Louisiana, 2013Every tornado watch in 2013

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.