Tornado Watch 744

Issued

Jul 24, 2008, 7:00 AM CDT (12:00 UTC)

Expired

Jul 24, 2008, 7:00 PM CDT

In force

12 hr

Issued by

the Storm Prediction Center

Largest hail expected

0.5 in

Strongest gust expected

60 kt

The Austin/San Antonio radar (KEWX), 83 km from the middle of the area, began a volume at 12:01 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

10%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

50%

• Mesoscale Discussion 1890Jul 24, 6:24 AM CDT
• Mesoscale Discussion 1894Jul 24, 12:22 PM CDT
• Mesoscale Discussion 1900Jul 24, 4:00 PM CDT

000
WWUS20 KWNS 241203
SEL4  
SPC WW 241203
TXZ000-CWZ000-242300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 744
NWS STORM PREDICTION CENTER NORMAN OK
700 AM CDT THU JUL 24 2008

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

       SOUTH TEXAS
       COASTAL WATERS

EFFECTIVE THIS THURSDAY MORNING AND EVENING FROM 700 AM UNTIL 600
PM CDT.

TORNADOES...HAIL TO 0.5 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 65 STATUTE
MILES EITHER SIDE OF A LINE FROM 45 MILES NORTH OF PALACIOS TEXAS
TO 40 MILES NORTHWEST OF LAREDO TEXAS.  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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 741. WATCH NUMBER 741 WILL NOT BE IN EFFECT AFTER
700 AM CDT. 

DISCUSSION...VERY MOIST AND MODERATE TO STRONGLY-SHEARED LOW-LVL
ENVIRONMENT IN NRN QUADRANT OF T.D. DOLLY WILL REMAIN FAVORABLE FOR
UPDRAFTS/STORMS WITH LOW-LVL ROTATION/POSSIBLE TORNADOES.  SFC
HEATING AND WEAK CONVERGENCE ALONG ARC OF CONFLUENCE EXTENDING N/NE
FROM CIRCULATION CENTER MAY FOSTER EXPANSION OF EXISTING
SHOWER/STORM COVERAGE IN OUTER FRINGE OF CIRCULATION LATER TODAY.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 15035.


...CORFIDI

Tornado Watches in Texas, 2008Every tornado watch in 2008

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.