Tornado Watch 181

Issued

Apr 22, 2011, 5:49 PM CDT (22:49 UTC)

Expired

Apr 23, 2011, 1:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

3 in

Strongest gust expected

70 kt

The Louisville radar (KLVX), 48 km from the middle of the area, began a volume at 22:50 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

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

40%

Ten or more severe hail reports

90%

One or more hailstones of 2 inches or more

60%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 519Apr 22, 3:48 PM CDT
• Mesoscale Discussion 521Apr 22, 5:27 PM CDT
• Mesoscale Discussion 523Apr 22, 7:29 PM CDT
• Mesoscale Discussion 526Apr 22, 9:20 PM CDT

050 
WWUS20 KWNS 222250
SEL1  
SPC WW 222250
ILZ000-INZ000-KYZ000-MOZ000-230600-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 181
NWS STORM PREDICTION CENTER NORMAN OK
550 PM CDT FRI APR 22 2011

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

       PARTS OF SOUTHERN ILLINOIS
       PARTS OF SOUTHERN INDIANA
       A LARGE PART OF KENTUCKY
       PARTS OF SOUTHEAST MISSOURI

EFFECTIVE THIS FRIDAY AFTERNOON AND SATURDAY MORNING FROM 550 PM
UNTIL 100 AM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 40 MILES NORTHEAST OF LONDON
KENTUCKY TO 25 MILES WEST NORTHWEST OF FARMINGTON MISSOURI.  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...THIS TORNADO WATCH REPLACES SEVERE
THUNDERSTORM WATCH NUMBER 178. WATCH NUMBER 178 WILL NOT BE IN
EFFECT AFTER 550 PM CDT. CONTINUE...WW 179...WW 180...

DISCUSSION...E/W BOUNDARY ACROSS NRN KY INTO ERN MO WILL FOCUS
GREATEST POTENTIAL FOR SUPERCELLS AS THUNDERSTORMS DEVELOP ACROSS
THE WATCH THRU THE EVENING.  IN ADDITION TO LARGE HAIL...TORNADOS
WILL BE POSSIBLE WITH ANY SUPERCELL.  STORMS EXPECTED TO DEVELOP
UPSCALE INTO LINES/BOW ECHOES UNDER STRONG MID LEVEL WINDS
INCREASING THREAT OF DAMAGING WINDS DURING THE EVENING.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 26035.


...HALES

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