Tornado Watch 159

Issued

Apr 19, 2011, 10:13 PM EDT (02:13 UTC)

Expired

Apr 20, 2011, 4:29 AM EDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

60 kt

The Cincinnati radar (KILN), 111 km from the middle of the area, began a volume at 02:13 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

80%

One or more gusts of 65 knots or more

50%

Ten or more severe hail reports

20%

One or more hailstones of 2 inches or more

10%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 480Apr 19, 9:47 PM EDT
• Mesoscale Discussion 485Apr 20, 12:56 AM EDT
• Mesoscale Discussion 486Apr 20, 3:20 AM EDT

355 
WWUS20 KWNS 200213
SEL9
SPC WW 200213
INZ000-KYZ000-OHZ000-200900-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 159
NWS STORM PREDICTION CENTER NORMAN OK
1015 PM EDT TUE APR 19 2011

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

       EXTREME SOUTHEAST INDIANA
       CENTRAL KENTUCKY
       SOUTHWEST OHIO

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1015 PM
UNTIL 500 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 EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHWEST OF
COLUMBUS OHIO TO 30 MILES EAST OF FORT CAMPBELL KENTUCKY.  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 155...WW 156...WW
157...WW 158...

DISCUSSION...FAST-MOVING BOW ECHOES IN INDIANA NEAR THE SURFACE
LOW/WARM FRONT...AND ANOTHER APPROACHING SW INDIANA/WRN KY...WILL
LIKELY PERSIST FOR SEVERAL MORE HOURS WILL MOVING EWD THROUGH A
MODERATELY UNSTABLE WARM SECTOR.  STRONG LOW-LEVEL FLOW/SHEAR WILL
MAINTAIN A RISK FOR DAMAGING WINDS...AS WELL AS A FEW QLCS
MESOVORTEX-TYPE TORNADOES.

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 27050.


...THOMPSON

Tornado Watches in Kentucky, 2011Tornado Watches in Ohio, 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.