Tornado Watch 129

Issued

Mar 18, 2008, 1:52 AM CDT (06:52 UTC)

Expired

Mar 18, 2008, 9:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Laughlin AFB radar (KDFX), 101 km from the middle of the area, began a volume at 06:54 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

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 448Mar 17, 11:06 PM CDT
• Mesoscale Discussion 450Mar 18, 1:32 AM CDT
• Mesoscale Discussion 451Mar 18, 1:43 AM CDT
• Mesoscale Discussion 454Mar 18, 4:57 AM CDT
• Mesoscale Discussion 456Mar 18, 7:22 AM CDT
• Mesoscale Discussion 457Mar 18, 7:50 AM CDT

000
WWUS20 KWNS 180656
SEL9  
SPC WW 180656
TXZ000-181400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 129
NWS STORM PREDICTION CENTER NORMAN OK
150 AM CDT TUE MAR 18 2008

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

       CENTRAL AND SOUTH CENTRAL TEXAS

EFFECTIVE THIS TUESDAY MORNING FROM 150 AM UNTIL 900 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 EAST AND WEST OF A LINE FROM 45 MILES SOUTH SOUTHEAST OF
DEL RIO TEXAS TO 40 MILES NORTHEAST OF BROWNWOOD TEXAS.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU9).

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 126. WATCH NUMBER 126 WILL NOT BE IN EFFECT AFTER
150 AM CDT. CONTINUE...WW 127...WW 128...

DISCUSSION...STRONG/SEVERE STORMS ARE CONTINUING TO LIFT NNEWD FROM
NEAR DRT TO NE OF ABI...WITH NORTHERN-MOST STORMS BECOMING
INCREASINGLY ELEVATED AS THE FRONTAL BOUNDARY MOVES SEWD ACROSS THE
NRN PART OF TX.  INTENSE UPPER LOW APPROACHING SWRN TX IS EXPECTED
TO CONTINUE MOVING SLOWLY EWD DURING THE OVERNIGHT HOURS WITH
PRIMARY DYNAMIC FORCING FOR LARGE SCALE ASCENT PROGRESSING EWD
TOWARD CENTRAL TX.  ALTHOUGH DEEP LAYER WINDS ALOFT ARE LARGELY
MERIDIONAL AS INDICATED BY AREA VWP AND WIND PROFILERS...SELY LOW
LEVEL WINDS ARE RESULTING IN STRONG LOW- AND DEEP-LAYER SHEAR
SUPPORTIVE OF SEVERE STORMS INCLUDING SUPERCELLS.  THREAT FOR
DAMAGING WINDS...HAIL...AND ISOLATED TORNADOES IS EXPECTED TO
PERSIST THROUGH THE PRE-DAWN HOURS.

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 20035.


...WEISS

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.