Alert archive / Kentucky / Mesoscale Discussions in 2015

Mesoscale Discussion 1336

July 9, 201525 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at Jul 9, 2015, 4:11 AM CDT for 25 counties in Kentucky. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Jul 9, 2015, 4:11 AM CDT (09:11 UTC)
Expired
Jul 9, 2015, 6:45 AM CDT
In force
3 hr
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 25 counties

Adair County, KY, Barren County, KY, Boyle County, KY, Butler County, KY, Casey County, KY, Christian County, KY, Edmonson County, KY, Grayson County, KY, Green County, KY, Hardin County, KY, Hart County, KY, Larue County, KY, Lincoln County, KY, Logan County, KY, Marion County, KY, Mercer County, KY, Metcalfe County, KY, Muhlenberg County, KY, Nelson County, KY, Ohio County, KY, Russell County, KY, Taylor County, KY, Todd County, KY, Warren County, KY, Washington County, KY

The radar

The Louisville radar (KLVX), 80 km from the middle of the area, began a volume at 09:13 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, 9.2 hours before the alert went out and 136 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 2015-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 226 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 2015-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 square meters per square second.1939Sfc1 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
226 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
1730 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
170 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 8, 9:01 PM CDTMesoscale DiscussionSPCBallard, Crittenden, Daviess, Henderson, Union, Webster89 min
Jul 8, 11:40 PM CDTMesoscale DiscussionSPCBreckinridge, Butler, Caldwell, Calloway, Christian, Crittenden and 19 more65 min
Jul 9, 11:15 AM CDTMesoscale DiscussionSPCAdair, Allen, Barren, Bell, Boyle, Breathitt and 37 more3 hr
Jul 9, 4:58 PM CDTMesoscale DiscussionSPCBreathitt, Clay, Floyd, Harlan, Jackson, Knott and 9 more2 hr
Jul 9, 6:10 PM CDTMesoscale DiscussionSPCBallard, Caldwell, Carlisle, Crittenden, Graves, Hickman and 8 more2 hr

Nearby

Mesoscale Discussions in Kentucky, 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.