Alert archive / Kentucky / Mesoscale Discussions in 2015

Mesoscale Discussion 1338

July 9, 201543 counties in Kentucky; 5 counties in Virginia; 5 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Jul 9, 2015, 11:15 AM CDT for 43 counties in Kentucky; 5 counties in Virginia; 5 counties in West Virginia. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Jul 9, 2015, 11:15 AM CDT (16:15 UTC)
Expired
Jul 9, 2015, 1:45 PM CDT
In force
3 hr
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 53 counties

Adair County, KY, Allen County, KY, Barren County, KY, Bell County, KY, Boyle County, KY, Breathitt County, KY, Casey County, KY, Clay County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Estill County, KY, Floyd County, KY, Garrard County, KY, Green County, KY, Harlan County, KY, Hart County, KY, Jackson County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Lincoln County, KY, Magoffin County, KY, Marion County, KY, Martin County, KY, McCreary County, KY, Metcalfe County, KY, Monroe County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Pulaski County, KY, Rockcastle County, KY, Russell County, KY, Taylor County, KY, Warren County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Buchanan County, VA, City of Norton, VA, Dickenson County, VA, Lee County, VA, Wise County, VA, Boone County, WV, Logan County, WV, McDowell County, WV, Mingo County, WV, Wyoming County, WV

The radar

The Jackson,KY radar (KJKL), 116 km from the middle of the area, began a volume at 16:18 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 12:00Z, 4.3 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 2015-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 492 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 12:00Z on 2015-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 158 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
492 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
964 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
158 m²/s²
0-3 km storm-relative helicity
174 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

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, 4:11 AM CDTMesoscale DiscussionSPCAdair, Barren, Boyle, Butler, Casey, Christian and 19 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
Jul 9, 11:59 AM CDTMesoscale DiscussionSPCClarke, Frederick, Loudoun, City of Winchester2 hr
Jul 9, 12:27 PM CDTTornado WatchSPCFrederick, City of Winchester6 hr
Jul 9, 2:09 PM CDTMesoscale DiscussionSPCArlington, Clarke, Frederick, Loudoun, City of Falls Church, City of Winchester96 min
Jul 9, 3:55 PM CDTMesoscale DiscussionSPCFrederick, City of Winchester95 min
Jul 9, 6:04 PM CDTMesoscale DiscussionSPCCaroline, Essex, Hanover, King and Queen, King George, King William and 7 more86 min
Jul 9, 10:27 AM CDTMesoscale DiscussionSPCBarbour, Braxton, Brooke, Calhoun, Clay, Doddridge and 25 more2 hr

Nearby

Mesoscale Discussions in Kentucky, 2015Mesoscale Discussions in Virginia, 2015Mesoscale Discussions in West Virginia, 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.