Severe Thunderstorm Watch 482

Issued

Jul 8, 2012, 2:48 PM EDT (18:48 UTC)

Expired

Jul 8, 2012, 8:27 PM EDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Cincinnati radar (KILN), 130 km from the middle of the area, began a volume at 18:50 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

10%

One or more EF2 to EF5 tornadoes

5%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 1434Jul 8, 1:14 PM EDT
• Mesoscale Discussion 1435Jul 8, 1:29 PM EDT
• Mesoscale Discussion 1437Jul 8, 4:41 PM EDT
• Mesoscale Discussion 1440Jul 8, 7:08 PM EDT

244 
WWUS20 KWNS 081850
SEL2  
SPC WW 081850
INZ000-KYZ000-OHZ000-090200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 482
NWS STORM PREDICTION CENTER NORMAN OK
250 PM EDT SUN JUL 8 2012

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

       SOUTHERN INDIANA
       NORTHERN AND CENTRAL KENTUCKY
       SOUTHERN OHIO

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 250 PM UNTIL
1000 PM EDT.

HAIL TO 2 INCHES 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 NORTH AND SOUTH OF A LINE FROM 50 MILES NORTHEAST
OF JACKSON KENTUCKY TO 55 MILES SOUTH SOUTHWEST OF BLOOMINGTON
INDIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).

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 481...

DISCUSSION...STORMS CONTINUE TO DEVELOP NEAR THE FRONT FROM SRN
INDIANA INTO EXTREME SRN OH AND NRN KY WITHIN A VERY WARM AND
UNSTABLE ENVIRONMENT /MLCAPE OF 3000-3500 J PER KG/.  ALTHOUGH FLOW
ALOFT IS MODEST AT BEST...CONVECTIVE SCALE ORGANIZATION IS APPARENT
WITH COMPLEX OVER SRN INDIANA WHICH IS PROPAGATING EWD.  OUTFLOW
BOUNDARY INTERACTIONS WILL ALSO RESULT IN ADDITIONAL STORMS...WITH
STRONGER CELLS CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS.

AVIATION...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 550. MEAN STORM
MOTION VECTOR 28015.


...WEISS

Severe Thunderstorm Watches in Kentucky, 2012Severe Thunderstorm Watches in Indiana, 2012Severe Thunderstorm Watches in Ohio, 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.