Severe Thunderstorm Watch 8

Issued

Jan 23, 2012, 12:34 AM EST (05:34 UTC)

Expired

Jan 23, 2012, 3:45 AM EST

In force

3 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

60 kt

The Louisville radar (KLVX), 50 km from the middle of the area, began a volume at 05:37 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

20%

One or more EF2 to EF5 tornadoes

5%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

20%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 50Jan 22, 9:25 PM EST
• Mesoscale Discussion 53Jan 22, 11:49 PM EST
• Mesoscale Discussion 54Jan 23, 1:52 AM EST

385 
WWUS20 KWNS 230534
SEL8
SPC WW 230534
INZ000-KYZ000-231000-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 8
NWS STORM PREDICTION CENTER NORMAN OK
1235 AM EST MON JAN 23 2012

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

       SOUTHERN INDIANA
       CENTRAL KENTUCKY

EFFECTIVE THIS MONDAY MORNING FROM 1235 AM UNTIL 500 AM EST.

HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55
STATUTE MILES EAST AND WEST OF A LINE FROM 75 MILES NORTH
NORTHWEST OF LOUISVILLE KENTUCKY TO 25 MILES SOUTH SOUTHEAST OF
BOWLING GREEN KENTUCKY.  FOR A COMPLETE DEPICTION OF THE WATCH
SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 6...WW 7...

DISCUSSION...EXTENSIVE SQUALL LINE WILL CONTINUE TO SURGE EWD ACROSS
INDIANA AND KY OVERNIGHT...IN ADVANCE OF A STRONG SHORTWAVE TROUGH
EJECTING NEWD FROM AR/MO.  THE CONVECTION APPEARS TO BE SLIGHTLY
ELEVATED AT THIS POINT...AND THE NARROW SURFACE-BASED WARM SECTOR
WILL LIKELY REMAIN PINCHED OFF FARTHER TO THE SW ACROSS WRN KY/TN.
THUS...DAMAGING WINDS WILL BE THE PRIMARY SEVERE STORM THREAT GIVEN
VERY STRONG ENVIRONMENTAL FLOW AND THE POTENTIAL FOR MOMENTUM
TRANSFER DOWN THROUGH THE SHALLOW NEAR-SURFACE STABLE LAYER.

AVIATION...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 450. MEAN STORM MOTION
VECTOR 25045.


...THOMPSON

Severe Thunderstorm Watches in Kentucky, 2012Severe Thunderstorm Watches in Indiana, 2012Every severe thunderstorm 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.