Alert archive / Kentucky / Mesoscale Discussions in 2018

Mesoscale Discussion 1626

November 6, 201844 counties in Kentucky; 4 counties in Virginia; Mingo County, Wayne County, West Virginia

The Storm Prediction Center issued this mesoscale discussion at Nov 6, 2018, 12:44 AM EST for 44 counties in Kentucky; 4 counties in Virginia; Mingo County, Wayne County, West Virginia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Nov 6, 2018, 12:44 AM EST (05:44 UTC)
Expired
Nov 6, 2018, 2:45 AM EST
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 50 counties

Bath County, KY, Bell County, KY, Bourbon County, KY, Boyd County, KY, Boyle County, KY, Breathitt County, KY, Carter County, KY, Casey County, KY, Clark County, KY, Clay County, KY, Elliott County, KY, Estill County, KY, Fayette County, KY, Fleming County, KY, Floyd County, KY, Garrard County, KY, Harlan County, KY, Jackson County, KY, Jessamine County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Lawrence County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Lincoln County, KY, Madison County, KY, Magoffin County, KY, Martin County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Nicholas County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Powell County, KY, Pulaski County, KY, Rockcastle County, KY, Rowan County, KY, Whitley County, KY, Wolfe County, KY, Buchanan County, VA, City of Norton, VA, Dickenson County, VA, Wise County, VA, Mingo County, WV, Wayne County, WV

The radar

The Jackson,KY radar (KJKL), 30 km from the middle of the area, began a volume at 05:45 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, 5.7 hours before the alert went out and 306 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 2018-11-06Temperature 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 00:00Z on 2018-11-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 521 square meters per square second.1939587897117Sfc1 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
711 m above ground
0-6 km bulk shear
75 kt
0-1 km storm-relative helicity
521 m²/s²
0-3 km storm-relative helicity
667 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 5, 9:52 PM ESTMesoscale DiscussionSPCAdair, Allen, Barren, Boyle, Casey, Clinton and 13 more53 min
Nov 5, 11:30 PM ESTTornado WatchSPCAdair, Barren, Casey, Clinton, Cumberland, Green and 5 more7 hr
Nov 6, 12:11 PM ESTMesoscale DiscussionSPCAccomack, Charles City, Essex, Gloucester, Henrico, Isle of Wight and 24 more94 min

Nearby

Mesoscale Discussions in Kentucky, 2018Mesoscale Discussions in Virginia, 2018Mesoscale Discussions in West Virginia, 2018Every mesoscale discussion in 2018

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.