Alert archive / Kentucky / Severe Thunderstorm Watches in 2016

Severe Thunderstorm Watch 147

May 7, 201620 counties in Indiana; 43 counties in Kentucky

The Storm Prediction Center issued this severe thunderstorm watch at May 7, 2016, 7:08 PM EDT for 20 counties in Indiana; 43 counties in Kentucky. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 7, 2016, 7:08 PM EDT (23:08 UTC)
Expired
May 8, 2016, 12:38 AM EDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 63 counties

Clark County, IN, Crawford County, IN, Daviess County, IN, Dubois County, IN, Floyd County, IN, Gibson County, IN, Greene County, IN, Harrison County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Orange County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Spencer County, IN, Sullivan County, IN, Vanderburgh County, IN, Warrick County, IN, Washington County, IN, Adair County, KY, Anderson County, KY, Barren County, KY, Boyle County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Casey County, KY, Clinton County, KY, Cumberland County, KY, Daviess County, KY, Edmonson County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hardin County, KY, Hart County, KY, Henderson County, KY, Hopkins County, KY, Jefferson County, KY, Larue County, KY, Lincoln County, KY, Marion County, KY, McCreary County, KY, McLean County, KY, Meade County, KY, Mercer County, KY, Metcalfe County, KY, Muhlenberg County, KY, Nelson County, KY, Ohio County, KY, Oldham County, KY, Pulaski County, KY, Rockcastle County, KY, Russell County, KY, Shelby County, KY, Spencer County, KY, Taylor County, KY, Union County, KY, Warren County, KY, Washington County, KY, Wayne County, KY, Webster County, KY

The radar

The Louisville radar (KLVX), 45 km from the middle of the area, began a volume at 23:09 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
10%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
50%
One or more gusts of 65 knots or more
10%
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%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 7, 7:23 PM EDTSevere Thunderstorm WarningINDSullivan37 min
May 7, 7:33 PM EDTSevere Thunderstorm WarningINDDaviess, Knox42 min
May 7, 7:40 PM EDTSevere Thunderstorm WarningPAHGibson, Posey50 min
May 7, 7:46 PM EDTSevere Thunderstorm WarningLMKDubois44 min
May 7, 7:47 PM EDTSevere Thunderstorm WarningINDKnox43 min
May 7, 7:59 PM EDTSevere Thunderstorm WarningPAHPike, Vanderburgh, Warrick46 min
May 7, 8:10 PM EDTSevere Thunderstorm WarningPAHSpencer35 min
May 7, 8:22 PM EDTSevere Thunderstorm WarningLMKCrawford, Dubois, Orange, Perry38 min
May 7, 8:36 PM EDTSevere Thunderstorm WarningLMKClark, Floyd, Harrison24 min
May 7, 8:45 PM EDTSevere Thunderstorm WarningPAHPike, Spencer, Warrick45 min
May 7, 8:48 PM EDTSevere Thunderstorm WarningLMKCrawford, Harrison, Orange, Perry, Washington42 min
May 7, 8:56 PM EDTSevere Thunderstorm WarningLMKDubois, Orange, Perry34 min
May 7, 8:59 PM EDTSevere Thunderstorm WarningLMKClark, Floyd, Harrison31 min
May 7, 9:18 PM EDTSevere Thunderstorm WarningLMKClark, Crawford, Floyd, Harrison42 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

Nashville Metro, TN (KBNA), launched 12:00Z, 11.1 hours before the alert went out and 218 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, Nashville Metro, TN at 12:00Z on 2016-05-07Temperature 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, Nashville Metro, TN at 12:00Z on 2016-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 286 square meters per square second.19395878Sfc1 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
1936 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
286 m²/s²
0-3 km storm-relative helicity
334 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
May 7, 2:45 PM EDTMesoscale DiscussionSPCClark, Crawford, Daviess, Dubois, Floyd, Gibson and 17 more3 hr
May 7, 6:32 PM EDTMesoscale DiscussionSPCClark, Crawford, Daviess, Dubois, Floyd, Gibson and 19 more118 min

Nearby

Severe Thunderstorm Watches in Kentucky, 2016Severe Thunderstorm Watches in Indiana, 2016Every severe thunderstorm watch in 2016

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.