Tornado Watch 186

Issued

Apr 23, 2011, 2:30 PM CDT (19:30 UTC)

Expired

Apr 23, 2011, 7:00 PM CDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

Two or more tornadoes

60%

One or more EF2 to EF5 tornadoes

30%

Ten or more severe wind reports

70%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 534Apr 23, 10:51 AM CDT
• Mesoscale Discussion 536Apr 23, 1:04 PM CDT
• Mesoscale Discussion 537Apr 23, 2:56 PM CDT
• Mesoscale Discussion 539Apr 23, 5:09 PM CDT
• Mesoscale Discussion 540Apr 23, 6:35 PM CDT

468 
WWUS20 KWNS 231930
SEL6  
SPC WW 231930
ILZ000-INZ000-KYZ000-240000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 186
NWS STORM PREDICTION CENTER NORMAN OK
230 PM CDT SAT APR 23 2011

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

       EXTREME SOUTHERN ILLINOIS
       EXTREME SOUTHERN INDIANA
       WESTERN AND CENTRAL KENTUCKY

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 230 PM UNTIL
700 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 40 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 10 MILES SOUTH OF PADUCAH
KENTUCKY TO 105 MILES EAST OF OWENSBORO KENTUCKY.  FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU6).

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.

DISCUSSION...A PERSISTENT MCS HAS BECOME MORE ORGANIZED EARLY THIS
AFTERNOON...AND WILL TRACK EAST-NORTHEASTWARD ALONG REMNANT OUTFLOW
BOUNDARY.  THIS SETUP SUGGESTS THE POTENTIAL FOR BOW ECHO
DEVELOPMENT WITH DAMAGING WINDS AND LARGE HAIL POSSIBLE. 
ALSO...FAVORABLE LOW LEVEL SHEAR AND CONVERGENCE ALONG BOUNDARY WILL
POSE THE RISK OF A FEW TORNADOES ON THE LEADING EDGE OF THE
MCS...AND WITH ISOLATED CELLS AHEAD OF THE MAIN LINE.

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
450. MEAN STORM MOTION VECTOR 25040.


...HART

Tornado Watches in Kentucky, 2011Tornado Watches in Illinois, 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.