Severe Thunderstorm Watch 13

Issued

Feb 10, 2009, 9:57 PM CST (03:57 UTC)

Expired

Feb 11, 2009, 2:37 AM CST

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Austin/San Antonio radar (KEWX), 105 km from the middle of the area, began a volume at 03:58 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

20%

One or more EF2 to EF5 tornadoes

2%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

20%

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 92Feb 10, 9:46 PM CST

580 
WWUS20 KWNS 110357
SEL3  
SPC WW 110357
TXZ000-CWZ000-110900-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 13
NWS STORM PREDICTION CENTER NORMAN OK
1000 PM CST TUE FEB 10 2009

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

       PARTS OF SOUTH TEXAS
       COASTAL WATERS

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1000 PM
UNTIL 300 AM CST.

HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 95
STATUTE MILES EAST AND WEST OF A LINE FROM 85 MILES NORTHWEST OF
HOUSTON TEXAS TO 35 MILES EAST SOUTHEAST OF BEEVILLE TEXAS.  FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU3).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 11...WW 12...

DISCUSSION...SQUALL LINE HAS EXTENDED SWD ALONG STRONG COLD FRONT
MOVING EWD ACROSS CENTRAL AND SRN TX. THE STRONG SURFACE CONVERGENCE
WILL ALLOW STORMS TO CONTINUE TO DEVELOP THROUGH THE SIGNIFICANT
INHIBITION. DAMAGING WINDS AND MARGINAL HAIL WILL BE ASSOCIATED WITH
THE LINE AS IT MOVES E/SEWD TOWARD TX COAST.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
MOTION VECTOR 27030.


...HALES

Severe Thunderstorm Watches in Texas, 2009Every severe thunderstorm 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.