Alert archive / Kentucky / Mesoscale Discussions in 2015

Mesoscale Discussion 1408

July 14, 2015Lawrence County, Illinois; 4 counties in Indiana; 18 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at Jul 14, 2015, 4:35 AM CDT for Lawrence County, Illinois; 4 counties in Indiana; 18 counties in Kentucky. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued
Jul 14, 2015, 4:35 AM CDT (09:35 UTC)
Expired
Jul 14, 2015, 6:00 AM CDT
In force
85 min
Issued by
the Storm Prediction Center
All 23 counties

Lawrence County, IL, Dubois County, IN, Knox County, IN, Perry County, IN, Pike County, IN, Adair County, KY, Boyle County, KY, Casey County, KY, Garrard County, KY, Green County, KY, Hardin County, KY, Jessamine County, KY, Larue County, KY, Lincoln County, KY, Marion County, KY, Meade County, KY, Mercer County, KY, Nelson County, KY, Pulaski County, KY, Rockcastle County, KY, Russell County, KY, Taylor County, KY, Washington County, KY

The radar

The Louisville radar (KLVX), 12 km from the middle of the area, began a volume at 09:38 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.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 9.6 hours before the alert went out and 207 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 00:00Z on 2015-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1428 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 2015-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 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
1428 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
1559 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
105 m²/s²
Significant tornado parameter
0.2
Supercell composite
4.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 13, 7:22 PM CDTTornado WatchSPCClark, Clay, Crawford, Cumberland, Effingham, Jasper and 2 more7 hr
Jul 13, 8:31 PM CDTMesoscale DiscussionSPCEdwards, Franklin, Gallatin, Hamilton, Hardin, Jackson and 11 more59 min
Jul 13, 9:19 PM CDTSevere Thunderstorm WatchSPCEdwards, Franklin, Gallatin, Hamilton, Hardin, Jefferson and 9 more7 hr
Jul 13, 10:22 PM CDTMesoscale DiscussionSPCBoone, Champaign, Cook, DeKalb, DuPage, Edgar and 11 more53 min
Jul 14, 12:56 AM CDTMesoscale DiscussionSPCClark, Clay, Coles, Crawford, Cumberland, Edwards and 8 more64 min
Jul 14, 2:06 AM CDTSevere Thunderstorm WatchSPCClark, Coles, Crawford, Cumberland, Jasper, Lawrence and 2 more5 hr
Jul 13, 11:47 PM CDTMesoscale DiscussionSPCBartholomew, Boone, Brown, Clark, Dearborn, Decatur and 24 more58 min
Jul 14, 11:40 AM CDTSevere Thunderstorm WatchSPCDearborn, Fayette, Franklin, Ohio, Ripley, Switzerland and 2 more7 hr
Jul 14, 2:12 PM CDTMesoscale DiscussionSPCBlackford, Dearborn, Fayette, Franklin, Jay, Ohio and 5 more93 min
Jul 14, 3:37 PM CDTMesoscale DiscussionSPCBlackford, Dearborn, Fayette, Franklin, Jay, Ohio and 5 more83 min
Jul 14, 5:35 AM CDTMesoscale DiscussionSPCBell, Clay, Jackson, Knox, Laurel, McCreary and 3 more55 min
Jul 14, 12:14 PM CDTMesoscale DiscussionSPCAllen, Clinton, Cumberland, McCreary, Monroe, Simpson91 min
Jul 14, 2:41 PM CDTMesoscale DiscussionSPCAllen, Calloway, Carlisle, Clinton, Fulton, Graves and 6 more94 min
Jul 14, 4:10 PM CDTSevere Thunderstorm WatchSPCAnderson, Bath, Bell, Bourbon, Boyle, Breathitt and 52 more6 hr

Nearby

Mesoscale Discussions in Kentucky, 2015Mesoscale Discussions in Indiana, 2015Mesoscale Discussions in Illinois, 2015Every mesoscale discussion in 2015

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.