Tornado Watch 151

Issued

Apr 13, 2009, 12:58 PM CDT (17:58 UTC)

Expired

Apr 13, 2009, 8:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Nashville radar (KOHX), 51 km from the middle of the area, began a volume at 17:59 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

30%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

70%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 466Apr 13, 12:09 PM CDT
• Mesoscale Discussion 468Apr 13, 2:27 PM CDT
• Mesoscale Discussion 470Apr 13, 3:22 PM CDT
• Mesoscale Discussion 472Apr 13, 5:52 PM CDT

529 
WWUS20 KWNS 131757
SEL1  
SPC WW 131757
ALZ000-INZ000-KYZ000-TNZ000-140100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 151
NWS STORM PREDICTION CENTER NORMAN OK
100 PM CDT MON APR 13 2009

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

       NORTHERN ALABAMA
       SOUTHERN INDIANA
       CENTRAL KENTUCKY
       MIDDLE TENNESSEE

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 100 PM UNTIL 800
PM 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 70 STATUTE
MILES EAST AND WEST OF A LINE FROM 35 MILES SOUTHWEST OF
HUNTSVILLE ALABAMA TO 20 MILES NORTHWEST OF LOUISVILLE KENTUCKY. 
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU1).

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 149...WW 150...

DISCUSSION...BROKEN LINES OF THUNDERSTORMS WILL CONTINUE
DEVELOPING/INTENSIFYING ACROSS WW THIS AFTERNOON AHEAD OF SURFACE
COLD FRONT AND STRONG UPPER LOW.  SHEAR REMAINS SUFFICIENT FOR
SUPERCELLS...AND ISOLATED TORNADO THREAT WITH MORE DISCRETE STORMS. 
OTHERWISE...LARGE HAIL AND ISOLATED DAMAGING WINDS WILL ACCOMPANY
MORE INTENSE CORES THROUGH THE EVENING.

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
400. MEAN STORM MOTION VECTOR 20025.


...EVANS

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