Tornado Watch 784

Issued

Sep 21, 2006, 9:30 PM CDT (02:30 UTC)

Expired

Sep 22, 2006, 5:00 AM CDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Western Arkansas radar (KSRX), 15 km from the middle of the area, began a volume at 02:30 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

30%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 1996Sep 21, 5:51 PM CDT
• Mesoscale Discussion 1997Sep 21, 7:50 PM CDT
• Mesoscale Discussion 1998Sep 21, 7:58 PM CDT
• Mesoscale Discussion 1999Sep 21, 11:25 PM CDT
• Mesoscale Discussion 2000Sep 22, 4:08 AM CDT

000 
WWUS20 KWNS 220231
SEL4  
SPC WW 220231
ARZ000-OKZ000-221000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 784
NWS STORM PREDICTION CENTER NORMAN OK
930 PM CDT THU SEP 21 2006

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

       WESTERN ARKANSAS
       SOUTHEAST OKLAHOMA

EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 930 PM
UNTIL 500 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 65 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES EAST NORTHEAST OF
FAYETTEVILLE ARKANSAS TO 10 MILES SOUTHEAST OF DE QUEEN ARKANSAS.
 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU4).

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 782...TORNADO WATCH NUMBER 783. WATCH NUMBER 782 783
WILL NOT BE IN EFFECT AFTER 930 PM CDT. 

DISCUSSION...INTENSE SUPERCELL APPROACHING NRN MCCURTAIN COUNTY OK
WILL LIKELY PERSIST FOR ANOTHER FEW HOURS WHILE MOVING EWD INTO
AR...WHILE OTHER STORMS WITH SUPERCELL STRUCTURES SHOULD ALSO SPREAD
EWD FROM E CENTRAL OK INTO W CENTRAL AR.  LOW-LEVEL MOISTURE WILL
INCREASE FROM THE S IN ADVANCE OF THESE STORMS...HELPING TO MAINTAIN
SURFACE-BASED CONVECTION...AND VERTICAL SHEAR PROFILES WILL REMAIN
QUITE FAVORABLE FOR SUPERCELLS WITH TORNADOES.

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 27035.


...THOMPSON

Tornado Watches in Arkansas, 2006Tornado Watches in Oklahoma, 2006Every tornado watch in 2006

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.