Alert archive / Kentucky / Mesoscale Discussions in 2015

Mesoscale Discussion 2053

December 23, 20154 states

The Storm Prediction Center issued this mesoscale discussion at Dec 23, 2015, 7:42 PM CST for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Dec 23, 2015, 7:42 PM CST (01:42 UTC)
Expired
Dec 23, 2015, 9:45 PM CST
In force
2 hr
Issued by
the Storm Prediction Center
All 95 counties

Adair County, KY, Anderson County, KY, Barren County, KY, Bath County, KY, Bell County, KY, Bourbon County, KY, Boyd County, KY, Boyle County, KY, Bracken County, KY, Breathitt County, KY, Carter County, KY, Casey County, KY, Clark County, KY, Clay County, KY, Clinton County, KY, Cumberland County, KY, Elliott County, KY, Estill County, KY, Fayette County, KY, Fleming County, KY, Franklin County, KY, Garrard County, KY, Green County, KY, Greenup County, KY, Harrison County, KY, Jackson County, KY, Jessamine County, KY, Johnson County, KY, Knox County, KY, Laurel County, KY, Lawrence County, KY, Lee County, KY, Leslie County, KY, Lewis County, KY, Lincoln County, KY, Madison County, KY, Magoffin County, KY, Marion County, KY, Martin County, KY, Mason County, KY, McCreary County, KY, Menifee County, KY, Mercer County, KY, Metcalfe County, KY, Montgomery County, KY, Morgan County, KY, Nicholas County, KY, Owsley County, KY, Pendleton County, KY, Perry County, KY, Powell County, KY, Pulaski County, KY, Robertson County, KY, Rockcastle County, KY, Rowan County, KY, Russell County, KY, Scott County, KY, Taylor County, KY, Washington County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Woodford County, KY, Adams County, OH, Athens County, OH, Brown County, OH, Clermont County, OH, Clinton County, OH, Coshocton County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Knox County, OH, Lawrence County, OH, Licking County, OH, Madison County, OH, Meigs County, OH, Morgan County, OH, Muskingum County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Ross County, OH, Scioto County, OH, Union County, OH, Vinton County, OH, Pickett County, TN, Cabell County, WV, Mason County, WV, Wayne County, WV

The radar

The Cincinnati radar (KILN), 95 km from the middle of the area, began a volume at 01:42 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 00:00Z, 1.7 hours before the alert went out and 96 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 00:00Z on 2015-12-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 21 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 00:00Z on 2015-12-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 313 square meters per square second.1939587897117136Sfc1 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
21 J/kg
Mixed-layer CIN
-105 J/kg
Mixed-layer LCL
861 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
313 m²/s²
0-3 km storm-relative helicity
304 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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
Dec 23, 6:25 PM CSTSevere Thunderstorm WatchSPCAdair, Allen, Anderson, Barren, Bath, Bourbon and 32 more5 hr
Dec 23, 6:35 PM CSTMesoscale DiscussionSPCBedford, Benton, Cannon, Carroll, Cheatham, Chester and 34 more55 min
Dec 23, 7:41 PM CSTMesoscale DiscussionSPCHardin, McNairy2 hr
Dec 23, 10:11 PM CSTMesoscale DiscussionSPCBedford, Bledsoe, Cannon, Coffee, Cumberland, DeKalb and 23 more2 hr
Dec 23, 10:33 PM CSTTornado WatchSPCBedford, Bledsoe, Cannon, Clay, Coffee, Cumberland and 24 more5 hr

Nearby

Mesoscale Discussions in Kentucky, 2015Mesoscale Discussions in Ohio, 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.