Tornado Watch 46

Issued

Feb 29, 2012, 5:39 AM EST (10:39 UTC)

Expired

Feb 29, 2012, 1:00 PM EST

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

65 kt

The Louisville radar (KLVX), 22 km from the middle of the area, began a volume at 10:42 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

30%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 176Feb 29, 1:49 AM EST
• Mesoscale Discussion 177Feb 29, 3:40 AM EST
• Mesoscale Discussion 179Feb 29, 8:38 AM EST
• Mesoscale Discussion 182Feb 29, 12:11 PM EST

908 
WWUS20 KWNS 291044
SEL6
SPC WW 291044
INZ000-KYZ000-TNZ000-291800-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 46
NWS STORM PREDICTION CENTER NORMAN OK
440 AM CST WED FEB 29 2012

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

       SOUTHERN INDIANA
       CENTRAL AND EASTERN KENTUCKY
       NORTHERN MIDDLE TENNESSEE

EFFECTIVE THIS WEDNESDAY MORNING FROM 440 AM UNTIL NOON CST.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 75 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE
MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH NORTHEAST OF
LOUISVILLE KENTUCKY TO 55 MILES SOUTH OF BOWLING GREEN 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.

OTHER WATCH INFORMATION...CONTINUE...WW 43...WW 44...WW 45...

DISCUSSION...SRN IL/FAR SE MO SQLN WITH EMBEDDED...LONG-LIVED
SUPERCELLS EXPECTED TO CONTINUE E AT 50 KTS.  SUBSTANTIAL LOW LVL
AIR MASS RECOVERY WILL PERSIST AHEAD OF SQLN ACROSS CNTRL KY...WITH
SFC DEWPOINTS IN THE UPR 50S TO LOW 60S F EXPECTED OVER WW AREA BY
12-15Z.  LARGE SCALE FORCING FOR ASCENT WILL BE WEAK.  BUT PRESENCE
OF EXISTING LONG-LIVED STORMS...STRENGTH OF WIND FIELD...AND
POTENTIAL FOR ISOLD WAA STORMS TO BECOME ROOTED IN THE BOUNDARY
LAYER AHEAD OF SQLN SUGGEST THE POSSIBILITY FOR TORNADOES IN
ADDITION TO LOCALLY DMGG WIND.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 26050.


...CORFIDI

Tornado Watches in Kentucky, 2012Tornado Watches in Tennessee, 2012Tornado Watches in Indiana, 2012Every tornado watch in 2012

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.