Tornado Watch 29

Issued

Feb 23, 2007, 9:26 PM CST (03:26 UTC)

Expired

Feb 24, 2007, 6:00 AM CST

In force

9 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

70 kt

The Altus AFB radar (KFDR), 95 km from the middle of the area, began a volume at 03:28 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

80%

One or more gusts of 65 knots or more

40%

Ten or more severe hail reports

50%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 178Feb 23, 5:51 PM CST
• Mesoscale Discussion 179Feb 23, 6:15 PM CST
• Mesoscale Discussion 181Feb 23, 7:35 PM CST
• Mesoscale Discussion 183Feb 23, 9:01 PM CST
• Mesoscale Discussion 186Feb 23, 11:35 PM CST
• Mesoscale Discussion 188Feb 24, 3:38 AM CST
• Mesoscale Discussion 189Feb 24, 5:20 AM CST

000
WWUS20 KWNS 240333
SEL9  
SPC WW 240333
OKZ000-TXZ000-241200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 29
NWS STORM PREDICTION CENTER NORMAN OK
925 PM CST FRI FEB 23 2007

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

       WESTERN AND CENTRAL OKLAHOMA
       NORTHWEST TEXAS AND THE EASTERN TEXAS PANHANDLE

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 925 PM
UNTIL 600 AM CST.

TORNADOES...HAIL TO 2 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 95 STATUTE
MILES EAST AND WEST OF A LINE FROM 15 MILES NORTH NORTHEAST OF
ALVA OKLAHOMA TO 15 MILES WEST SOUTHWEST OF ABILENE 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 27. WATCH NUMBER 27 WILL NOT BE IN EFFECT AFTER 925
PM CST. CONTINUE...WW 28...

DISCUSSION...TSTMS/SUPERCELLS EXPECTED TO CONTINUE DEVELOPING E OF
DRY LINE OVER THE ERN TX PANHANDLE AND NW TX...WHILE EXISTING
DRY-LINE-INDUCED STORMS NOW IN NW OK CONTINUE NEWD AND BECOME
SLIGHTLY ELEVATED.  A BIT LATER TONIGHT...ADDITIONAL
STORMS/SCATTERED CLUSTERS MAY FORM IN WRN PART OF WATCH AS COLD
FRONT NOW CROSSING THE NM/TX LINE CONTINUES EWD INTO INCREASING LOW
LEVEL MOISTURE.
AMPLE SHEAR WILL BE PRESENT FOR SUPERCELLS AS 500 MB SW FLOW
INCREASES TO AROUND 70 KTS.  MID LEVEL COOLING AND LARGE SCALE
ASCENT AHEAD OF STRONG NM UPR TROUGH MAY COMPENSATE FOR NOCTURNAL
COOLING TO SUPPORT MODEST SFC-BASED DESTABILIZATION IN WW AREA. 
SOME OF THE STORMS LIKELY WILL EVOLVE INTO SHORT BANDS AFTER ABOUT
06-08Z.  THESE STRUCTURES MAY YIELD AN INCREASING THREAT FOR HIGH
WIND IN ADDITION TO ISOLATED TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 24045.


...CORFIDI

Tornado Watches in Oklahoma, 2007Tornado Watches in Texas, 2007Every tornado watch in 2007

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.