Alert archive / Kentucky / Mesoscale Discussions in 2014

Mesoscale Discussion 1485

July 27, 201459 counties in Kentucky; 28 counties in Tennessee; 7 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Jul 27, 2014, 2:14 PM CDT for 59 counties in Kentucky; 28 counties in Tennessee; 7 counties in Virginia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 27, 2014, 2:14 PM CDT (19:14 UTC)
Expired
Jul 27, 2014, 4:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 94 counties

Adair County, KY, Allen County, KY, Barren County, KY, Bath County, KY, Bell County, KY, Bourbon County, KY, Boyle County, KY, Breathitt County, KY, Casey County, KY, Clark County, KY, Clay County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Estill County, KY, Fayette County, KY, Floyd County, KY, Garrard County, KY, Green County, KY, Harlan County, KY, Hart County, KY, Jackson County, KY, Jessamine County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Larue County, KY, Laurel County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Lincoln County, KY, Logan County, KY, Madison County, KY, Magoffin County, KY, Marion County, KY, McCreary County, KY, Menifee County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Montgomery County, KY, Morgan County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Powell County, KY, Pulaski County, KY, Rockcastle County, KY, Russell County, KY, Simpson County, KY, Taylor County, KY, Todd County, KY, Warren County, KY, Washington County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Woodford County, KY, Anderson County, TN, Campbell County, TN, Carter County, TN, Claiborne County, TN, Clay County, TN, Fentress County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hancock County, TN, Hawkins County, TN, Jackson County, TN, Jefferson County, TN, Knox County, TN, Macon County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Scott County, TN, Smith County, TN, Sullivan County, TN, Sumner County, TN, Trousdale County, TN, Unicoi County, TN, Union County, TN, Washington County, TN, City of Bristol, VA, City of Norton, VA, Dickenson County, VA, Lee County, VA, Russell County, VA, Scott County, VA, Wise County, VA

The radar

The Jackson,KY radar (KJKL), 145 km from the middle of the area, began a volume at 19:17 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 7.2 hours before the alert went out and 190 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 2014-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1964 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 2014-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 117 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
1964 J/kg
Mixed-layer CIN
-89 J/kg
Mixed-layer LCL
768 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
117 m²/s²
0-3 km storm-relative helicity
132 m²/s²
Significant tornado parameter
0.7
Supercell composite
2.3

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 26, 8:11 PM CDTMesoscale DiscussionSPCAnderson, Breckinridge, Bullitt, Butler, Carroll, Crittenden and 25 more64 min
Jul 26, 8:41 PM CDTSevere Thunderstorm WatchSPCAdair, Allen, Anderson, Barren, Bourbon, Boyle and 50 more3 hr
Jul 26, 10:29 PM CDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bourbon, Boyle and 54 more61 min
Jul 27, 3:34 AM CDTMesoscale DiscussionSPCAnderson, Boyle, Bullitt, Casey, Garrard, Green and 14 more116 min
Jul 27, 10:19 AM CDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Boyle, Breckinridge and 61 more116 min
Jul 27, 12:00 PM CDTTornado WatchSPCAdair, Allen, Anderson, Barren, Bath, Bell and 65 more11 hr
Jul 27, 12:44 PM CDTTornado WatchSPCBoone, Boyd, Bracken, Campbell, Carroll, Carter and 10 more9 hr
Jul 27, 6:28 PM CDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bath, Bell and 56 more92 min
Jul 27, 9:08 AM CDTMesoscale DiscussionSPCGreensville, Southampton, City of Emporia, City of Franklin, City of Suffolk67 min
Jul 27, 3:49 PM CDTMesoscale DiscussionSPCCarroll, Floyd, Franklin, Grayson, Henry, Patrick and 7 more116 min
Jul 27, 5:32 PM CDTTornado WatchSPCGrayson, Smyth6 hr
Jul 27, 5:52 PM CDTSevere Thunderstorm WatchSPCClarke, Frederick, Shenandoah, Warren, City of Winchester7 hr

Nearby

Mesoscale Discussions in Kentucky, 2014Mesoscale Discussions in Tennessee, 2014Mesoscale Discussions in Virginia, 2014Every mesoscale discussion in 2014

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.