Alert archive / Kentucky / Mesoscale Discussions in 2012

Mesoscale Discussion 179

February 29, 20124 states

The Storm Prediction Center issued this mesoscale discussion at Feb 29, 2012, 8:38 AM EST for 4 states. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued
Feb 29, 2012, 8:38 AM EST (13:38 UTC)
Expired
Feb 29, 2012, 9:45 AM EST
In force
67 min
Issued by
the Storm Prediction Center
All 112 counties

Clark County, IN, Dearborn County, IN, Floyd County, IN, Harrison County, IN, Jefferson County, IN, Ohio County, IN, Switzerland County, IN, Adair County, KY, Allen County, KY, Anderson County, KY, Barren County, KY, Bath County, KY, Boone County, KY, Bourbon County, KY, Boyle County, KY, Bracken County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Campbell County, KY, Carroll County, KY, Casey County, KY, Clark County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Estill County, KY, Fayette County, KY, Fleming County, KY, Franklin County, KY, Gallatin County, KY, Garrard County, KY, Grant County, KY, Grayson County, KY, Green County, KY, Greenup County, KY, Hardin County, KY, Harrison County, KY, Hart County, KY, Henry County, KY, Jackson County, KY, Jefferson County, KY, Jessamine County, KY, Kenton County, KY, Larue County, KY, Laurel County, KY, Lee County, KY, Lewis County, KY, Lincoln County, KY, Logan County, KY, Madison County, KY, Marion County, KY, Mason County, KY, McCreary County, KY, Meade County, KY, Menifee County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Montgomery County, KY, Nelson County, KY, Nicholas County, KY, Ohio County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Powell County, KY, Pulaski County, KY, Robertson County, KY, Rockcastle County, KY, Rowan County, KY, Russell County, KY, Scott County, KY, Shelby County, KY, Simpson County, KY, Spencer County, KY, Taylor County, KY, Trimble County, KY, Warren County, KY, Washington County, KY, Wayne County, KY, Wolfe County, KY, Woodford County, KY, Adams County, OH, Brown County, OH, Clermont County, OH, Hamilton County, OH, Highland County, OH, Pike County, OH, Ross County, OH, Scioto County, OH, Benton County, TN, Cheatham County, TN, Clay County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Fentress County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Macon County, TN, Montgomery County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Wilson County, TN

The radar

The Louisville radar (KLVX), 86 km from the middle of the area, began a volume at 13:41 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, 1.6 hours before the alert went out and 152 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 2012-02-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 580 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 2012-02-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 365 square meters per square second.1939587897Sfc1 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
580 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
510 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
365 m²/s²
0-3 km storm-relative helicity
485 m²/s²
Significant tornado parameter
1.9
Supercell composite
8.5

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
Feb 29, 1:49 AM ESTMesoscale DiscussionSPCGibson, Knox, Pike, Posey, Spencer, Vanderburgh and 1 more56 min
Feb 29, 2:14 AM ESTTornado WatchSPCGibson, Pike, Posey, Spencer, Vanderburgh, Warrick11 hr
Feb 29, 3:40 AM ESTMesoscale DiscussionSPCBartholomew, Brown, Clark, Crawford, Daviess, Dearborn and 22 more65 min
Feb 29, 4:53 AM ESTMesoscale DiscussionSPCGibson, Knox, Pike, Posey, Spencer, Vanderburgh and 1 more97 min
Feb 29, 5:39 AM ESTTornado WatchSPCClark, Crawford, Dubois, Floyd, Harrison, Jefferson and 4 more7 hr
Feb 29, 12:41 PM ESTMesoscale DiscussionSPCUnion3 hr
Feb 29, 8:27 AM ESTTornado WatchSPCBoone, Bracken, Campbell, Carroll, Gallatin, Grant and 6 more5 hr
Feb 29, 9:07 AM ESTMesoscale DiscussionSPCCaldwell, Calloway, Carlisle, Christian, Crittenden, Fulton and 12 more53 min
Feb 29, 12:11 PM ESTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bath, Bell and 61 more2 hr
Feb 29, 12:31 PM ESTTornado WatchSPCAdair, Allen, Barren, Bath, Bell, Boyle and 59 more8 hr
Feb 29, 1:24 PM ESTMesoscale DiscussionSPCBoyd, Greenup, Lawrence36 min
Feb 29, 1:37 PM ESTTornado WatchSPCBoyd, Carter, Greenup, Lawrence, Lewis, Mason7 hr
Feb 29, 4:18 PM ESTMesoscale DiscussionSPCBoyd, Carter, Greenup, Lawrence, Lewis87 min
Feb 29, 4:34 PM ESTMesoscale DiscussionSPCAdair, Allen, Barren, Bath, Bell, Boyle and 48 more116 min
Feb 29, 4:20 AM ESTTornado WatchSPCCarroll, Crockett, Dyer, Gibson, Haywood, Henry and 6 more9 hr
Feb 29, 12:46 PM ESTMesoscale DiscussionSPCFayette, Hardeman, Hardin, McNairy89 min
Feb 29, 2:48 PM ESTTornado WatchSPCFranklin, Lincoln, Moore7 hr
Feb 29, 3:23 PM ESTMesoscale DiscussionSPCJohnson67 min
Feb 29, 5:36 PM ESTMesoscale DiscussionSPCBlount, Bradley, Carter, Cocke, Greene, Hamilton and 6 more54 min
Feb 29, 6:37 PM ESTTornado WatchSPCBlount, Bradley, Carter, Cocke, Greene, Hamilton and 10 more3 hr

Nearby

Mesoscale Discussions in Kentucky, 2012Mesoscale Discussions in Tennessee, 2012Mesoscale Discussions in Ohio, 2012Every mesoscale discussion in 2012

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.