Tornado Watch 64

Issued

Mar 25, 2009, 5:40 PM CDT (22:40 UTC)

Expired

Mar 25, 2009, 11:39 PM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Shreveport radar (KSHV), 71 km from the middle of the area, began a volume at 22:42 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

50%

One or more EF2 to EF5 tornadoes

40%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

40%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 261Mar 25, 2:42 PM CDT
• Mesoscale Discussion 264Mar 25, 5:29 PM CDT
• Mesoscale Discussion 266Mar 25, 8:32 PM CDT

526 
WWUS20 KWNS 252240
SEL4  
SPC WW 252240
LAZ000-TXZ000-260600-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 64
NWS STORM PREDICTION CENTER NORMAN OK
540 PM CDT WED MAR 25 2009

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

       NORTHERN AND CENTRAL LOUISIANA
       EASTERN TEXAS

EFFECTIVE THIS WEDNESDAY AFTERNOON AND THURSDAY MORNING FROM 540
PM UNTIL 100 AM CDT.

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 70 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 35 MILES WEST OF LUFKIN
TEXAS TO 60 MILES NORTH NORTHEAST OF ALEXANDRIA LOUISIANA.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU4).

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 62...WW 63...

DISCUSSION...THREAT FOR SEVERE THUNDERSTORMS...INCLUDING LONG-LIVED
SUPERCELLS/BOW ECHOES...WILL INCREASE ACROSS WW THROUGH THE EVENING.
 SURFACE FRONT WILL LIKELY SHIFT SLOWLY NWD INTO NRN LA AS STRONG
SSWLY LLJ DEVELOPS AND SHIFTS TOWARDS THE LOWER MS RIVER VALLEY...
ALLOWING SUFFICIENT SURFACE-BASED INSTABILITY TO OVERSPREAD MUCH OF
THE WATCH.  VERY STRONG LOW LEVEL SHEAR WILL REMAIN SUPPORTIVE OF
TORNADOES...ALTHOUGH DAMAGING WINDS AND LARGE HAIL ARE ALSO LIKELY
WITH THE STRONGER CORES.

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
500. MEAN STORM MOTION VECTOR 27035.


...EVANS

Tornado Watches in Louisiana, 2009Tornado Watches in Texas, 2009Every tornado watch in 2009

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.