Tornado Watch 15

Issued

Jan 25, 2012, 7:56 AM CST (13:56 UTC)

Expired

Jan 25, 2012, 3:00 PM CST

In force

7 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

40%

One or more gusts of 65 knots or more

5%

Ten or more severe hail reports

10%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 67Jan 25, 7:13 AM CST
• Mesoscale Discussion 69Jan 25, 11:24 AM CST
• Mesoscale Discussion 70Jan 25, 1:41 PM CST

235 
WWUS20 KWNS 251358
SEL5
SPC WW 251358
LAZ000-TXZ000-CWZ000-252100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 15
NWS STORM PREDICTION CENTER NORMAN OK
755 AM CST WED JAN 25 2012

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

       WESTERN AND SOUTHERN LOUISIANA
       SOUTHEAST TEXAS
       COASTAL WATERS

EFFECTIVE THIS WEDNESDAY MORNING AND AFTERNOON FROM 755 AM UNTIL
300 PM CST.

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 95 STATUTE
MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH OF NATCHITOCHES
LOUISIANA TO 30 MILES SOUTH SOUTHWEST OF PORT ARTHUR TEXAS.  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.

OTHER WATCH INFORMATION...CONTINUE...WW 14...

DISCUSSION...NRN PARTS OF E TX SQLN EXPECTED TO CONTINUE ENEWD INTO
RECOVERING BOUNDARY LAYER ENVIRONMENT NEAR DIFFUSE WNW-ESE WARM
FRONT NOW EXTENDING FROM N OF LUFKIN TX TO NEAR BATON ROUGE LA.
AREA VWP DATA SHOW 50+ KT SSWLY LLJ SHIFTING EWD IN TANDEM WITH
SQLN...ENHANCING LOW LVL SHEAR AND STRENGTHENING LOW LVL MOISTURE
TRANSPORT.  WHILE MID LVL LAPSE RATES WILL REMAIN WEAK...COMBINATION
OF INCREASING LOW LVL MOISTURE/SHEAR AND MODEST SFC HEATING MAY
YIELD AN ENVIRONMENT FAVORABLE FOR LEWPS WITH LOCALLY DMGG WIND AND
ISOLD TORNADOES.  OTHER STORMS MAY ARISE LATER THIS MORNING OR EARLY
THIS AFTN WITHIN CONFLUENCE BAND NOW OVER THE HOUSTON AREA AHEAD OF
SQLN. ANY SUSTAINED STORMS FORMING WITH THIS ACTIVITY MAY POSE A
TORNADO THREAT LATER TODAY OVER SW LA.

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 21035.


...CORFIDI

Tornado Watches in Louisiana, 2012Tornado Watches in Texas, 2012Every tornado watch in 2012

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.