Tornado Watch 239

Issued

Apr 27, 2011, 5:44 PM EDT (21:44 UTC)

Expired

Apr 28, 2011, 1:00 AM EDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

60 kt

The Louisville radar (KLVX), 85 km from the middle of the area, began a volume at 21:44 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

5%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 627Apr 27, 3:22 PM EDT
• Mesoscale Discussion 630Apr 27, 4:06 PM EDT
• Mesoscale Discussion 632Apr 27, 5:38 PM EDT
• Mesoscale Discussion 635Apr 27, 6:27 PM EDT
• Mesoscale Discussion 644Apr 27, 9:22 PM EDT
• Mesoscale Discussion 645Apr 27, 10:12 PM EDT
• Mesoscale Discussion 649Apr 28, 12:27 AM EDT
• Mesoscale Discussion 650Apr 28, 12:34 AM EDT

324 
WWUS20 KWNS 272146
SEL9
SPC WW 272146
INZ000-KYZ000-OHZ000-VAZ000-WVZ000-280500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 239
NWS STORM PREDICTION CENTER NORMAN OK
545 PM EDT WED APR 27 2011

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

       SOUTHERN INDIANA
       CENTRAL AND EASTERN KENTUCKY
       SOUTHERN OHIO
       WESTERN VIRGINIA
       WESTERN WEST VIRGINIA

EFFECTIVE THIS WEDNESDAY AFTERNOON AND THURSDAY MORNING FROM 545
PM UNTIL 100 AM EDT.

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 75 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 10 MILES SOUTH OF OWENSBORO
KENTUCKY TO 65 MILES SOUTHEAST OF HUNTINGTON WEST VIRGINIA.  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 232...WW 233...WW
234...WW 235...WW 236...WW 237...WW 238...

DISCUSSION...TSTMS ARE EXPECTED TO INTENSIFY THIS EVENING E OF
MIGRATORY SURFACE LOW DEVELOPING NEWD FROM NW OF PAH TOWARD WRN LAKE
ERIE.  FOCUSED MOISTURE AND HEAT FLUXES OCCURRING ALONG
STRENGTHENING LLJ AXIS SHOULD SUPPORT SUFFICIENT DESTABILIZATION TO
SUSTAIN LONG-LIVED UPDRAFTS WITHIN NWD-EXPANDING WARM SECTOR.  GIVEN
THE STRONG AMBIENT VERTICAL SHEAR IN PLACE...THE POTENTIAL WILL
EXIST FOR SUPERCELLS AND BOWING STRUCTURES CAPABLE OF TORNADOES AND
DAMAGING WINDS.

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 350.
MEAN STORM MOTION VECTOR 22045.


...MEAD

Tornado Watches in Kentucky, 2011Tornado Watches in West Virginia, 2011Tornado Watches in Indiana, 2011Every tornado watch in 2011

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.