Tornado Watch 17

Issued

Feb 12, 2007, 2:13 PM CST (20:13 UTC)

Expired

Feb 12, 2007, 10:39 PM CST

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Lake Charles radar (KLCH), 67 km from the middle of the area, began a volume at 20:15 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

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

5%

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

70%

• Mesoscale Discussion 131Feb 12, 10:19 AM CST
• Mesoscale Discussion 134Feb 12, 1:43 PM CST
• Mesoscale Discussion 138Feb 12, 6:27 PM CST
• Mesoscale Discussion 140Feb 12, 9:38 PM CST

000
WWUS20 KWNS 122013
SEL7  
SPC WW 122013
LAZ000-TXZ000-CWZ000-130500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 17
NWS STORM PREDICTION CENTER NORMAN OK
210 PM CST MON FEB 12 2007

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

       SOUTHERN AND CENTRAL LOUISIANA
       SOUTHEAST TEXAS
       COASTAL WATERS

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 210 PM UNTIL
1100 PM CST.

TORNADOES...HAIL TO 2 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 60 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 10 MILES NORTH OF HOUSTON
TEXAS TO 25 MILES NORTH NORTHEAST OF LAFAYETTE 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.

OTHER WATCH INFORMATION...CONTINUE...WW 16...

DISCUSSION...TSTMS HAVE BECOME SLIGHTLY MORE DISCRETE IN THE PAST
1-2 HRS ALONG SRN END OF CONVECTIVE BAND OVER E TX/FAR WRN LA. 
POTENTIAL FOR DISCRETE OR NEAR-DISCRETE SFC-BASED STORMS SHOULD
CONTINUE TO SLOWLY INCREASE OVER FAR SE TX/SRN LA OVER THROUGH MID
EVENING AS /1/ BOUNDARY LAYER CONTINUES TO MOISTEN AND /2/ REGION IS
GLANCED BY 50 KT MID LEVEL WSWLY SPEED MAX ASSOCIATED WITH NW TX UPR
TROUGH.  GIVEN BACKED LOW LEVEL FLOW INVOF CONVECTIVE BAND AND
INCREASING MOISTURE AVAILABILITY...A THREAT MAY DEVELOP FOR
TORNADOES THROUGH LATE TONIGHT.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
400. MEAN STORM MOTION VECTOR 24030.


...CORFIDI

Tornado Watches in Louisiana, 2007Tornado Watches in Texas, 2007Every tornado watch in 2007

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; radar from the NEXRAD Level II archive.