Alert archive / Kentucky / Mesoscale Discussions in 2014

Mesoscale Discussion 818

June 4, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Jun 4, 2014, 6:34 PM EDT for 4 states. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued
Jun 4, 2014, 6:34 PM EDT (22:34 UTC)
Expired
Jun 4, 2014, 8:30 PM EDT
In force
116 min
Issued by
the Storm Prediction Center
All 73 counties

Bath County, KY, Bourbon County, KY, Boyd County, KY, Breathitt County, KY, Carter 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, Greenup 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, Lewis 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, Rockcastle County, KY, Rowan County, KY, Wolfe County, KY, Woodford County, KY, Gallia County, OH, Lawrence County, OH, Meigs County, OH, Scioto County, OH, Buchanan County, VA, City of Norton, VA, Dickenson County, VA, Lee County, VA, Russell County, VA, Wise County, VA, Boone County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Fayette County, WV, Gilmer County, WV, Jackson County, WV, Kanawha County, WV, Lincoln County, WV, Logan County, WV, Mason County, WV, McDowell County, WV, Mingo County, WV, Nicholas County, WV, Putnam County, WV, Raleigh County, WV, Roane County, WV, Wayne County, WV, Wirt County, WV, Wyoming County, WV

The radar

The Jackson,KY radar (KJKL), 50 km from the middle of the area, began a volume at 22:35 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 10.6 hours before the alert went out and 197 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, Cncnati-Daytn, OH at 12:00Z on 2014-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 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, Cncnati-Daytn, OH at 12:00Z on 2014-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 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
2 J/kg
Mixed-layer CIN
-114 J/kg
Mixed-layer LCL
1323 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
100 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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
Jun 4, 12:11 PM EDTMesoscale DiscussionSPCBath, Boyd, Carter, Elliott, Fleming, Floyd and 13 more2 hr
Jun 4, 1:20 PM EDTMesoscale DiscussionSPCAnderson, Ballard, Barren, Bourbon, Boyle, Breckinridge and 45 more115 min
Jun 4, 2:51 PM EDTTornado WatchSPCAdair, Anderson, Bath, Bell, Boone, Bourbon and 73 more10 hr
Jun 4, 3:21 PM EDTTornado WatchSPCAllen, Ballard, Barren, Breckinridge, Bullitt, Butler and 35 more6 hr
Jun 4, 7:57 PM EDTMesoscale DiscussionSPCAllen, Ballard, Barren, Butler, Caldwell, Calloway and 22 more2 hr

Nearby

Mesoscale Discussions in Kentucky, 2014Mesoscale Discussions in West Virginia, 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.