Tornado Watch 210

Issued

Apr 29, 2009, 12:36 PM CDT (17:36 UTC)

Expired

Apr 29, 2009, 10:00 PM CDT

In force

9 hr

Issued by

the Storm Prediction Center

Largest hail expected

3 in

Strongest gust expected

70 kt

The Dyess AFB radar (KDYX), 118 km from the middle of the area, began a volume at 17:38 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

20%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

70%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 627Apr 29, 9:16 AM CDT
• Mesoscale Discussion 628Apr 29, 12:07 PM CDT
• Mesoscale Discussion 633Apr 29, 3:34 PM CDT
• Mesoscale Discussion 635Apr 29, 5:19 PM CDT
• Mesoscale Discussion 636Apr 29, 5:53 PM CDT
• Mesoscale Discussion 637Apr 29, 6:21 PM CDT

504 
WWUS20 KWNS 291737
SEL0  
SPC WW 291737
TXZ000-300100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 210
NWS STORM PREDICTION CENTER NORMAN OK
1240 PM CDT WED APR 29 2009

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

       PARTS OF NORTHWEST TEXAS

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 1240 PM UNTIL
800 PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 50 MILES NORTH OF MIDLAND
TEXAS TO 45 MILES NORTHEAST OF MINERAL WELLS TEXAS.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU0).

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 209...

DISCUSSION...THUNDERSTORMS REDEVELOPING IN A VERY UNSTABLE AIR MASS
ALONG RESIDUAL OUTFLOW BOUNDARIES. WITH MLCAPES RISING TO 3000 J/KG
THIS AFTERNOON AND 35-45KT OF DEEP LAYER SHEAR...SUPERCELLS ARE THE
MOST LIKELY MODE.  IN ADDITION TO VERY LARGE HAIL...TORNADOES WILL
BECOME INCREASINGLY A THREAT DURING THE AFTERNOON.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 24020.


...HALES

Tornado 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.