Alert archive / Kentucky / Mesoscale Discussions in 2015

Mesoscale Discussion 2048

December 23, 201510 counties in Indiana; 57 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at Dec 23, 2015, 5:59 PM EST for 10 counties in Indiana; 57 counties in Kentucky. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Dec 23, 2015, 5:59 PM EST (22:59 UTC)
Expired
Dec 23, 2015, 8:00 PM EST
In force
2 hr
Issued by
the Storm Prediction Center
All 67 counties

Clark County, IN, Crawford County, IN, Dubois County, IN, Floyd County, IN, Harrison County, IN, Orange County, IN, Perry County, IN, Scott County, IN, Spencer County, IN, Washington County, IN, Adair County, KY, Allen County, KY, Anderson County, KY, Barren County, KY, Bourbon County, KY, Boyle County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Carroll County, KY, Casey County, KY, Christian County, KY, Clinton County, KY, Cumberland County, KY, Daviess County, KY, Edmonson County, KY, Fayette County, KY, Franklin County, KY, Garrard County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hardin County, KY, Hart County, KY, Henry County, KY, Hopkins County, KY, Jefferson County, KY, Jessamine County, KY, Larue County, KY, Lincoln County, KY, Logan County, KY, Madison County, KY, Marion County, KY, McLean County, KY, Meade County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Nelson County, KY, Ohio County, KY, Oldham County, KY, Owen County, KY, Pulaski County, KY, Rockcastle County, KY, Russell County, KY, Scott County, KY, Shelby County, KY, Simpson County, KY, Spencer County, KY, Taylor County, KY, Todd County, KY, Trimble County, KY, Warren County, KY, Washington County, KY, Wayne County, KY, Woodford County, KY

The radar

The Louisville radar (KLVX), 57 km from the middle of the area, began a volume at 23:00 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, 11.0 hours before the alert went out and 157 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 2015-12-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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 2015-12-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 194 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
596 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
194 m²/s²
0-3 km storm-relative helicity
164 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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, 10:05 AM ESTMesoscale DiscussionSPCGibson, Posey, Vanderburgh85 min
Dec 23, 10:13 AM ESTTornado WatchSPCGibson, Posey, Vanderburgh8 hr
Dec 23, 10:41 AM ESTMesoscale DiscussionSPCLake, Newton2 hr
Dec 23, 11:29 AM ESTMesoscale DiscussionSPCPosey, Vanderburgh91 min
Dec 23, 1:06 PM ESTMesoscale DiscussionSPCBartholomew, Brown, Clark, Clay, Crawford, Daviess and 31 more84 min
Dec 23, 1:28 PM ESTTornado WatchSPCBartholomew, Boone, Brown, Carroll, Clark, Clay and 51 more8 hr
Dec 23, 2:55 PM ESTMesoscale DiscussionSPCAllen, DeKalb, Elkhart, Huntington, Kosciusko, LaGrange and 4 more95 min
Dec 23, 3:16 PM ESTMesoscale DiscussionSPCBartholomew, Brown, Clark, Crawford, Dearborn, Decatur and 34 more59 min
Dec 23, 7:13 AM ESTMesoscale DiscussionSPCBallard, Carlisle, Fulton, Graves, Hickman, Livingston and 1 more2 hr
Dec 23, 3:49 PM ESTMesoscale DiscussionSPCCalloway86 min
Dec 23, 4:17 PM ESTSevere Thunderstorm WatchSPCBoone, Bracken, Campbell, Gallatin, Grant, Kenton and 5 more7 hr

Nearby

Mesoscale Discussions in Kentucky, 2015Mesoscale Discussions in Indiana, 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.