Tornado Watch 8

Issued

Feb 10, 2009, 12:49 PM CST (18:49 UTC)

Expired

Feb 10, 2009, 9:35 PM CST

In force

9 hr

Issued by

the Storm Prediction Center

Largest hail expected

3 in

Strongest gust expected

60 kt

The Altus AFB radar (KFDR), 57 km from the middle of the area, began a volume at 18:49 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

70%

One or more EF2 to EF5 tornadoes

40%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

95%

One or more hailstones of 2 inches or more

95%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 82Feb 10, 12:17 PM CST
• Mesoscale Discussion 85Feb 10, 2:33 PM CST
• Mesoscale Discussion 86Feb 10, 3:45 PM CST
• Mesoscale Discussion 89Feb 10, 6:13 PM CST
• Mesoscale Discussion 90Feb 10, 7:18 PM CST

841 
WWUS20 KWNS 101851
SEL8  
SPC WW 101851
OKZ000-TXZ000-110200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 8
NWS STORM PREDICTION CENTER NORMAN OK
1250 PM CST TUE FEB 10 2009

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

       CENTRAL AND SOUTHWEST OKLAHOMA
       NORTHWEST TEXAS

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 1250 PM UNTIL
800 PM CST.

TORNADOES...HAIL TO 3 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 65 STATUTE
MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHWEST OF CHANDLER
OKLAHOMA TO 35 MILES SOUTHEAST OF ABILENE TEXAS.  FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU8).

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.

DISCUSSION...CU FIELD CONTINUES TO INCREASE OVER NORTHWEST TX AND
SOUTHWEST OK...IN REGION OF RELATIVELY STRONG HEATING AND INCREASING
MOISTURE.  FORECAST SOUNDINGS SUGGEST THIS REGION IS NEAR CONVECTIVE
INITIATION.  STORMS ARE EXPECTED TO BECOME SUPERCELLULAR WITH VERY
LARGE HAIL AND ISOLATED TORNADOES POSSIBLE.  THREAT FOR STRONG
TORNADOES WILL INCREASE BY EARLY EVENING AS LOW LEVEL VERTICAL WIND
PROFILES STRENGTHEN.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 24035.


...HART

Tornado Watches in Texas, 2009Tornado Watches in Oklahoma, 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.