Alert archive / Kentucky / Mesoscale Discussions in 2017

Mesoscale Discussion 452

April 5, 20176 states

The Storm Prediction Center issued this mesoscale discussion at Apr 5, 2017, 6:57 PM CDT for 6 states. It was in force for 48 min.

The area

The outline as issued.

The facts

Issued
Apr 5, 2017, 6:57 PM CDT (23:57 UTC)
Expired
Apr 5, 2017, 7:45 PM CDT
In force
48 min
Issued by
the Storm Prediction Center
Concerning
Tornado watch 127
All 185 counties

Autauga County, AL, Blount County, AL, Bullock County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, DeKalb County, AL, Elmore County, AL, Etowah County, AL, Jackson County, AL, Jefferson County, AL, Lee County, AL, Macon County, AL, Madison County, AL, Marshall County, AL, Montgomery County, AL, Randolph County, AL, Russell County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tallapoosa County, AL, Barrow County, GA, Bartow County, GA, Butts County, GA, Carroll County, GA, Catoosa County, GA, Chattahoochee County, GA, Chattooga County, GA, Cherokee County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Dade County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Fannin County, GA, Fayette County, GA, Floyd County, GA, Forsyth County, GA, Fulton County, GA, Gilmer County, GA, Gordon County, GA, Gwinnett County, GA, Habersham County, GA, Hall County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Jackson County, GA, Lamar County, GA, Lumpkin County, GA, Meriwether County, GA, Monroe County, GA, Murray County, GA, Muscogee County, GA, Newton County, GA, Paulding County, GA, Pickens County, GA, Pike County, GA, Polk County, GA, Rockdale County, GA, Spalding County, GA, Talbot County, GA, Towns County, GA, Troup County, GA, Union County, GA, Upson County, GA, Walker County, GA, Walton County, GA, White County, GA, Whitfield County, GA, Adair County, KY, Anderson County, KY, Bath County, KY, Bell County, KY, Bourbon County, KY, Boyle County, KY, Bracken County, KY, Breathitt 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, Harlan County, KY, Harrison County, KY, Jackson County, KY, Jessamine County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Lee County, KY, Leslie County, KY, Lincoln County, KY, Madison County, KY, Magoffin County, KY, Marion County, KY, Mason County, KY, McCreary County, KY, Menifee County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Montgomery County, KY, Morgan County, KY, Nicholas County, KY, Owen County, KY, Owsley 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, Shelby County, KY, Spencer County, KY, Taylor County, KY, Washington County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Woodford County, KY, Cherokee County, NC, Clay County, NC, Graham County, NC, Swain County, NC, Anderson County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Cannon County, TN, Claiborne County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, DeKalb County, TN, Fentress County, TN, Franklin County, TN, Grainger County, TN, Grundy County, TN, Hamblen County, TN, Hamilton County, TN, Hancock County, TN, Jackson County, TN, Jefferson County, TN, Knox County, TN, Loudon County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Polk County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sequatchie County, TN, Sevier County, TN, Smith County, TN, Union County, TN, Van Buren County, TN, Warren County, TN, White County, TN, Lee County, VA

The radar

The Northeast Alabama radar (KHTX), 137 km from the middle of the area, began a volume at 23:54 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, 12.0 hours before the alert went out and 179 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 2017-04-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2017-04-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 161 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1902 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
161 m²/s²
0-3 km storm-relative helicity
208 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 4, 11:54 PM CDTMesoscale DiscussionSPCBaldwin, Butler, Clarke, Coffee, Conecuh, Covington and 8 more2 hr
Apr 5, 1:37 AM CDTSevere Thunderstorm WatchSPCAutauga, Barbour, Bibb, Blount, Bullock, Butler and 42 more6 hr
Apr 5, 3:41 AM CDTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Bullock, Butler, Chambers and 38 more2 hr
Apr 5, 6:15 AM CDTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Bullock, Butler, Calhoun and 35 more90 min
Apr 5, 6:54 AM CDTTornado WatchSPCAutauga, Baldwin, Barbour, Bibb, Bullock, Butler and 44 more8 hr
Apr 5, 9:43 AM CDTMesoscale DiscussionSPCBarbour, Chambers, Lee, Macon, Russell, Tallapoosa2 hr
Apr 5, 11:54 AM CDTTornado Watch PDSSPCDale, Geneva, Henry, Houston10 hr
Apr 5, 1:02 PM CDTMesoscale DiscussionSPCBlount, Cullman, DeKalb, Jackson, Jefferson, Lauderdale and 8 more2 hr
Apr 5, 1:50 PM CDTTornado WatchSPCAutauga, Barbour, Bibb, Blount, Bullock, Calhoun and 36 more8 hr
Apr 5, 2:12 PM CDTMesoscale DiscussionSPCBarbour, Bullock, Dale, Henry, Houston, Lee and 2 more93 min
Apr 5, 3:29 PM CDTMesoscale DiscussionSPCBaldwin, Clarke, Conecuh, Escambia, Marengo, Mobile and 3 more3 hr
Apr 5, 3:51 PM CDTMesoscale DiscussionSPCBlount, Calhoun, Chambers, Cherokee, Chilton, Clay and 19 more84 min
Apr 5, 9:25 AM CDTMesoscale DiscussionSPCBaldwin, Banks, Barrow, Bartow, Burke, Butts and 45 more95 min
Apr 5, 10:38 AM CDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 52 more97 min
Apr 5, 5:29 PM CDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Berrien, Brantley, Brooks and 22 more61 min
Apr 5, 1:59 PM CDTMesoscale DiscussionSPCBoone, Bracken, Campbell, Carroll, Gallatin, Grant and 11 more3 hr
Apr 5, 3:08 PM CDTSevere Thunderstorm WatchSPCBoone, Bracken, Campbell, Carroll, Daviess, Gallatin and 9 more5 hr
Apr 5, 4:47 PM CDTMesoscale DiscussionSPCCampbell, Kenton88 min
Apr 5, 6:19 PM CDTMesoscale DiscussionSPCBoyd, Carter, Elliott, Floyd, Greenup, Johnson and 8 more2 hr
Apr 5, 1:02 PM CDTMesoscale DiscussionSPCColumbus58 min
Apr 5, 1:45 PM CDTTornado WatchSPCBladen, Brunswick, Columbus, New Hanover, Pender, Robeson5 hr
Apr 5, 3:23 PM CDTMesoscale DiscussionSPCBladen, Columbus97 min

Nearby

Mesoscale Discussions in Kentucky, 2017Mesoscale Discussions in Georgia, 2017Mesoscale Discussions in Tennessee, 2017Every mesoscale discussion in 2017

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.