Tornado Watch 229

Issued

Apr 27, 2011, 8:34 AM EDT (12:34 UTC)

Expired

Apr 27, 2011, 12:21 PM EDT

In force

4 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

60 kt

The Jackson,KY radar (KJKL), 86 km from the middle of the area, began a volume at 12:34 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

20%

Ten or more severe wind reports

30%

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

60%

• Mesoscale Discussion 614Apr 27, 5:33 AM EDT

265 
WWUS20 KWNS 271227
SEL9
SPC WW 271227
KYZ000-NCZ000-TNZ000-VAZ000-271800-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 229
NWS STORM PREDICTION CENTER NORMAN OK
825 AM EDT WED APR 27 2011

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

       EASTERN KENTUCKY
       EXTREME SOUTHWESTERN NORTH CAROLINA
       EASTERN TENNESSEE
       EXTREME SOUTHWESTERN VIRGINIA

EFFECTIVE THIS WEDNESDAY MORNING AND AFTERNOON FROM 825 AM UNTIL
200 PM 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 55 STATUTE
MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH NORTHEAST OF
JACKSON KENTUCKY TO 65 MILES SOUTH SOUTHEAST OF CROSSVILLE
TENNESSEE.  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 225...WW 226...WW
227...WW 228...

DISCUSSION...LINE OF STORMS WILL CONTINUE EWD THROUGH ERN KY AND ERN
TN EARLY THIS MORNING. INSTABILITY IS MARGINAL...BUT STORMS ARE
WITHIN AN ENVIRONMENT CHARACTERIZED BY STRONG SHEAR PROFILES WITH
LARGE HODOGRAPHS SUPPORTIVE OF EMBEDDED MESOCYCLONES AND LEWP
STRUCTURES. DAMAGING WIND AND ISOLATED TORNADOES WILL REMAIN
POSSIBLE WITH THIS ACTIVITY NEXT FEW HOURS.

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 500.
MEAN STORM MOTION VECTOR 26040.


...DIAL

Tornado Watches in Kentucky, 2011Tornado Watches in Tennessee, 2011Tornado Watches in North Carolina, 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.