Tornado Watch 9

Issued

Feb 10, 2009, 2:42 PM CST (20:42 UTC)

Expired

Feb 10, 2009, 10:00 PM CST

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Norman radar (KTLX), 118 km from the middle of the area, began a volume at 20:43 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

60%

One or more EF2 to EF5 tornadoes

30%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

40%

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 83Feb 10, 1:29 PM CST
• Mesoscale Discussion 84Feb 10, 2:16 PM CST
• Mesoscale Discussion 87Feb 10, 4:50 PM CST
• Mesoscale Discussion 89Feb 10, 6:13 PM CST
• Mesoscale Discussion 91Feb 10, 8:34 PM CST

156 
WWUS20 KWNS 102042
SEL9  
SPC WW 102042
ARZ000-OKZ000-110400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 9
NWS STORM PREDICTION CENTER NORMAN OK
245 PM CST TUE FEB 10 2009

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

       NORTHWEST ARKANSAS
       EASTERN OKLAHOMA

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 245 PM UNTIL
1000 PM CST.

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 80 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES EAST OF DURANT
OKLAHOMA TO 40 MILES EAST NORTHEAST OF BARTLESVILLE OKLAHOMA. 
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...CONTINUE...WW 8...

DISCUSSION...THUNDERSTORMS ARE SLOWLY INCREASING IN WARM ADVECTION
REGIME ACROSS SOUTHEAST OK.  MEANWHILE...LINE OF SUPERCELLS IS
INTENSIFYING OVER CENTRAL OK.  BOTH AREAS OF STORMS WILL SPREAD
ACROSS THE WATCH AREA THIS AFTERNOON AND EVENING.  LOW LEVEL WIND
FIELDS ARE FORECAST TO STRENGTHEN AND BECOME QUITE FAVORABLE FOR
SUPERCELLS AND TORNADOES THIS AFTERNOON AND EVENING.  DAMAGING WINDS
AND LARGE HAIL WILL ALSO BE POSSIBLE.

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
450. MEAN STORM MOTION VECTOR 23035.


...HART

Tornado Watches in Oklahoma, 2009Tornado Watches in Arkansas, 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.