Alert archive / Kentucky / Mesoscale Discussions in 2009

Mesoscale Discussion 424

April 10, 2009Crawford County, Harrison County, Perry County, Indiana; 34 counties in Kentucky; 30 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Apr 10, 2009, 4:33 AM EDT for Crawford County, Harrison County, Perry County, Indiana; 34 counties in Kentucky; 30 counties in Tennessee. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued
Apr 10, 2009, 4:33 AM EDT (08:33 UTC)
Expired
Apr 10, 2009, 5:30 AM EDT
In force
57 min
Issued by
the Storm Prediction Center
All 67 counties

Crawford County, IN, Harrison County, IN, Perry County, IN, Adair County, KY, Allen County, KY, Barren County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Christian County, KY, Clinton County, KY, Cumberland County, KY, Daviess County, KY, Edmonson County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hardin County, KY, Hart County, KY, Jefferson County, KY, Larue County, KY, Logan County, KY, Marion County, KY, McLean County, KY, Meade County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Nelson County, KY, Ohio County, KY, Russell County, KY, Simpson County, KY, Spencer County, KY, Taylor County, KY, Todd County, KY, Warren County, KY, Washington County, KY, Bedford County, TN, Cannon County, TN, Cheatham County, TN, Clay County, TN, Coffee County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lewis County, TN, Lincoln County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Moore County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Williamson County, TN, Wilson County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 8.6 hours before the alert went out and 94 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 2009-04-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 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 00:00Z on 2009-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 square meters per square second.19395878Sfc1 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
3 J/kg
Mixed-layer CIN
-189 J/kg
Mixed-layer LCL
1711 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
179 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
Apr 10, 1:50 AM EDTMesoscale DiscussionSPCCrawford, Dubois, Gibson, Harrison, Knox, Orange and 7 more85 min
Apr 10, 2:22 AM EDTSevere Thunderstorm WatchSPCClark, Crawford, Floyd, Harrison, Perry, Posey and 3 more4 hr
Apr 10, 9:53 AM EDTTornado WatchSPCClark, Crawford, Dubois, Floyd, Harrison, Jefferson and 8 more7 hr
Apr 10, 2:26 PM EDTMesoscale DiscussionSPCClark, Crawford, Dubois, Floyd, Harrison, Orange and 7 more64 min
Apr 10, 4:06 PM EDTMesoscale DiscussionSPCCrawford, Floyd, Harrison, Perry54 min
Apr 9, 11:52 PM EDTSevere Thunderstorm WatchSPCBallard, Calloway, Carlisle, Crittenden, Fulton, Graves and 5 more4 hr
Apr 10, 9:22 AM EDTMesoscale DiscussionSPCCalloway, Marshall, Todd, Trigg83 min
Apr 10, 11:30 AM EDTMesoscale DiscussionSPCAnderson, Bourbon, Boyle, Breckinridge, Bullitt, Clark and 14 more60 min
Apr 10, 12:14 PM EDTMesoscale DiscussionSPCAllen, Calloway, Christian, Logan, Lyon, Marshall and 4 more76 min
Apr 10, 2:51 PM EDTTornado WatchSPCBath, Bell, Breathitt, Clay, Elliott, Estill and 27 more6 hr
Apr 10, 3:56 PM EDTMesoscale DiscussionSPCBreathitt, Clark, Elliott, Estill, Floyd, Jackson and 12 more64 min
Apr 10, 4:42 PM EDTMesoscale DiscussionSPCBreathitt, Clay, Elliott, Floyd, Harlan, Johnson and 14 more63 min
Apr 10, 7:53 PM EDTMesoscale DiscussionSPCHarlan, Letcher67 min
Apr 9, 11:48 PM EDTTornado WatchSPCCrockett, Dyer, Fayette, Gibson, Haywood, Lake and 4 more4 hr
Apr 10, 2:24 AM EDTMesoscale DiscussionSPCHardeman, Hardin, McNairy96 min
Apr 10, 12:23 PM EDTTornado Watch PDSSPCAnderson, Bedford, Bledsoe, Blount, Bradley, Campbell and 43 more8 hr
Apr 10, 1:58 PM EDTMesoscale DiscussionSPCBedford, Cannon, Coffee, DeKalb, Franklin, Giles and 17 more92 min
Apr 10, 4:43 PM EDTMesoscale DiscussionSPCPolk92 min

Nearby

Mesoscale Discussions in Kentucky, 2009Mesoscale Discussions in Tennessee, 2009Mesoscale Discussions in Indiana, 2009Every mesoscale discussion in 2009

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.