Alert archive / Kentucky / Severe Thunderstorm Watches in 2011

Severe Thunderstorm Watch 480

June 15, 201114 counties in Indiana; 27 counties in Kentucky

The Storm Prediction Center issued this severe thunderstorm watch at Jun 15, 2011, 6:04 PM EDT for 14 counties in Indiana; 27 counties in Kentucky. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Jun 15, 2011, 6:04 PM EDT (22:04 UTC)
Expired
Jun 15, 2011, 10:00 PM EDT
In force
4 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 41 counties

Clark County, IN, Crawford County, IN, Daviess County, IN, Dubois County, IN, Floyd County, IN, Greene County, IN, Harrison County, IN, Knox County, IN, Martin County, IN, Orange County, IN, Perry County, IN, Scott County, IN, Sullivan County, IN, Washington County, IN, Adair County, KY, Allen County, KY, Barren County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hardin County, KY, Hart County, KY, Jefferson County, KY, Larue County, KY, Logan County, KY, Marion County, KY, Meade County, KY, Metcalfe County, KY, Monroe County, KY, Nelson County, KY, Ohio County, KY, Oldham County, KY, Simpson County, KY, Taylor County, KY, Warren County, KY

The radar

The Louisville radar (KLVX), 66 km from the middle of the area, began a volume at 22:06 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
5%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
50%
One or more hailstones of 2 inches or more
20%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jun 15, 6:16 PM EDTSevere Thunderstorm WarningLMKButler29 min
Jun 15, 6:23 PM EDTSevere Thunderstorm WarningINDDaviess, Knox, Sullivan40 min
Jun 15, 6:44 PM EDTSevere Thunderstorm WarningLMKButler, Edmonson, Warren31 min
Jun 15, 7:04 PM EDTSevere Thunderstorm WarningLMKButler, Logan, Warren26 min
Jun 15, 7:09 PM EDTSevere Thunderstorm WarningLMKDubois19 min
Jun 15, 7:15 PM EDTSevere Thunderstorm WarningLMKBarren, Butler, Edmonson, Warren30 min
Jun 15, 7:42 PM EDTSevere Thunderstorm WarningLMKBarren, Edmonson, Warren18 min
Jun 15, 8:02 PM EDTSevere Thunderstorm WarningLMKEdmonson, Grayson, Hart15 min
Jun 15, 8:06 PM EDTSevere Thunderstorm WarningLMKPerry39 min
Jun 15, 8:16 PM EDTSevere Thunderstorm WarningLMKAllen, Simpson29 min
Jun 15, 8:38 PM EDTSevere Thunderstorm WarningLMKBarren, Monroe21 min
Jun 15, 8:53 PM EDTSevere Thunderstorm WarningLMKBreckinridge, Grayson37 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 10.1 hours before the alert went out and 293 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2011-06-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2011-06-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
983 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
175 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 15, 5:24 AM EDTMesoscale DiscussionSPCClay, Daviess, Dubois, Gibson, Greene, Knox and 10 more96 min
Jun 15, 3:13 PM EDTMesoscale DiscussionSPCGibson, Posey, Spencer, Vanderburgh, Warrick2 hr
Jun 15, 11:54 AM EDTMesoscale DiscussionSPCAllen, Calloway, Christian, Fulton, Graves, Hickman and 7 more2 hr

Nearby

Severe Thunderstorm Watches in Kentucky, 2011Severe Thunderstorm Watches in Indiana, 2011Every severe thunderstorm watch in 2011

Sources

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.