Tornado Watch 764

Issued

Oct 9, 2009, 12:24 PM CDT (17:24 UTC)

Expired

Oct 9, 2009, 7:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

60 kt

The Nashville radar (KOHX), 90 km from the middle of the area, began a volume at 17:26 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

30%

One or more EF2 to EF5 tornadoes

40%

Ten or more severe wind reports

40%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

10%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 2095Oct 9, 12:08 PM CDT
• Mesoscale Discussion 2096Oct 9, 1:41 PM CDT
• Mesoscale Discussion 2097Oct 9, 2:39 PM CDT
• Mesoscale Discussion 2098Oct 9, 4:52 PM CDT

293 
WWUS20 KWNS 091723
SEL4  
SPC WW 091723
ALZ000-KYZ000-TNZ000-092200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 764
NWS STORM PREDICTION CENTER NORMAN OK
1225 PM CDT FRI OCT 9 2009

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

       NORTHWEST ALABAMA
       SOUTH CENTRAL INTO SOUTHEAST KENTUCKY
       MIDDLE TENNESSEE

EFFECTIVE THIS FRIDAY AFTERNOON FROM 1225 PM UNTIL 500 PM CDT.

TORNADOES...HAIL TO 1 INCH 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 40 MILES SOUTHWEST OF MUSCLE
SHOALS ALABAMA TO 50 MILES WEST NORTHWEST OF LONDON KENTUCKY. 
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...CONTINUE...WW 762...WW 763...

DISCUSSION...POTENTIAL FOR SUPERCELLS AND SMALL BOW ECHOES WILL
INCREASE ACROSS WW THIS AFTERNOON INVOF EJECTING MID LEVEL IMPULSE
AND ASSOCIATED SWLY LLJ.  WIND DAMAGE WILL LIKELY BE PRIMARY THREAT
WITH THIS ACTIVITY...ALTHOUGH VERY STRONG SHEAR SHOULD SUPPORT
ISOLATED TORNADO POTENTIAL AS WELL.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400.
MEAN STORM MOTION VECTOR 24040.


...EVANS

Tornado Watches in Tennessee, 2009Tornado Watches in Kentucky, 2009Tornado Watches in Alabama, 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.