Alert archive / Kentucky / Mesoscale Discussions in 2007

Mesoscale Discussion 2114

October 18, 20078 states

The Storm Prediction Center issued this mesoscale discussion at Oct 18, 2007, 5:39 PM CDT for 8 states. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued
Oct 18, 2007, 5:39 PM CDT (22:39 UTC)
Expired
Oct 18, 2007, 6:45 PM CDT
In force
66 min
Issued by
the Storm Prediction Center
All 150 counties

Colbert County, AL, Fayette County, AL, Franklin County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Marion County, AL, Pickens County, AL, Winston County, AL, Crittenden County, AR, Mississippi County, AR, Alexander County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Union County, IL, White County, IL, Williamson County, IL, Crawford County, IN, Floyd County, IN, Harrison County, IN, Perry County, IN, Posey County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Allen County, KY, Ballard County, KY, Barren County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Daviess County, KY, Edmonson County, KY, Fulton County, KY, Graves County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hardin County, KY, Hart County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Jefferson County, KY, Larue County, KY, Livingston County, KY, Logan County, KY, Lyon County, KY, Marion County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Meade County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Nelson County, KY, Ohio County, KY, Oldham County, KY, Simpson County, KY, Spencer County, KY, Taylor County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Warren County, KY, Webster County, KY, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Scott County, MO, Alcorn County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Clay County, MS, DeSoto County, MS, Grenada County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Lowndes County, MS, Marshall County, MS, Monroe County, MS, Oktibbeha County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Webster County, MS, Yalobusha County, MS, Benton County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Crockett County, TN, Davidson County, TN, Decatur County, TN, Dickson County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Giles County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lake County, TN, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Obion County, TN, Perry County, TN, Robertson County, TN, Rutherford County, TN, Shelby County, TN, Stewart County, TN, Sumner County, TN, Tipton County, TN, Trousdale County, TN, Wayne County, TN, Weakley County, TN, Williamson County, TN, Wilson County, TN

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, 10.7 hours before the alert went out and 161 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 2007-10-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 7 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 2007-10-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 611 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
7 J/kg
Mixed-layer CIN
-70 J/kg
Mixed-layer LCL
537 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
611 m²/s²
0-3 km storm-relative helicity
678 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.3

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
Oct 18, 3:02 AM CDTMesoscale DiscussionSPCBaldwin, Choctaw, Clarke, Conecuh, Escambia, Marengo and 4 more58 min
Oct 18, 10:26 AM CDTMesoscale DiscussionSPCColbert, Franklin, Lamar, Lauderdale, Lawrence, Limestone and 2 more2 hr
Oct 18, 11:15 AM CDTMesoscale DiscussionSPCBaldwin90 min
Oct 18, 1:31 PM CDTTornado WatchSPCColbert, Cullman, Fayette, Franklin, Greene, Hale and 13 more9 hr
Oct 18, 3:52 PM CDTMesoscale DiscussionSPCAutauga, Baldwin, Barbour, Bibb, Bullock, Butler and 36 more83 min
Oct 17, 7:09 PM CDTTornado WatchSPCAshley, Chicot, Clay, Craighead, Crittenden, Cross and 8 more7 hr
Oct 17, 8:10 PM CDTMesoscale DiscussionSPCAshley, Baxter, Benton, Boone, Bradley, Calhoun and 48 more95 min
Oct 17, 10:56 PM CDTMesoscale DiscussionSPCArkansas, Baxter, Boone, Bradley, Calhoun, Carroll and 64 more64 min
Oct 17, 11:38 PM CDTTornado WatchSPCArkansas, Baxter, Boone, Bradley, Calhoun, Clark and 39 more3 hr
Oct 18, 12:27 AM CDTMesoscale DiscussionSPCCraighead, Crittenden, Cross, Lee, Mississippi, Phillips and 2 more93 min
Oct 18, 1:31 AM CDTTornado WatchSPCClay, Craighead, Crittenden, Cross, Greene, Lawrence and 6 more4 hr
Oct 18, 2:02 AM CDTMesoscale DiscussionSPCArkansas, Baxter, Clay, Cleburne, Cleveland, Conway and 27 more58 min
Oct 18, 4:08 AM CDTMesoscale DiscussionSPCCraighead, Crittenden, Cross, Greene, Mississippi, Poinsett67 min
Oct 17, 7:57 PM CDTMesoscale DiscussionSPCAdams, Brown, Fulton, Hancock, Henderson, McDonough and 3 more63 min
Oct 17, 11:40 PM CDTTornado WatchSPCAlexander, Bond, Calhoun, Clinton, Fayette, Greene and 13 more4 hr
Oct 18, 2:01 AM CDTTornado WatchSPCCass, Champaign, Christian, Clark, Clay, Coles and 29 more5 hr
Oct 18, 2:27 AM CDTTornado WatchSPCEdwards, Franklin, Gallatin, Hamilton, Hardin, Jefferson and 9 more4 hr
Oct 18, 4:37 AM CDTTornado WatchSPCFord, Iroquois, Kankakee3 hr
Oct 18, 11:36 AM CDTMesoscale DiscussionSPCBoone, Carroll, Kane, McHenry, Ogle, Stephenson and 1 more2 hr
Oct 18, 1:44 PM CDTMesoscale DiscussionSPCChampaign, Clark, Clay, Coles, Crawford, Cumberland and 23 more2 hr
Oct 18, 3:23 PM CDTTornado WatchSPCBond, Champaign, Christian, Clark, Clay, Clinton and 28 more8 hr
Oct 18, 6:34 PM CDTMesoscale DiscussionSPCChampaign, Clark, Clay, Clinton, Coles, Crawford and 16 more116 min
Oct 18, 1:59 PM CDTMesoscale DiscussionSPCAllen, Cass, DeKalb, Elkhart, Fulton, Huntington and 13 more61 min
Oct 18, 6:30 PM CDTMesoscale DiscussionSPCBath, Boone, Bourbon, Bracken, Campbell, Clark and 17 more90 min

Nearby

Mesoscale Discussions in Kentucky, 2007Mesoscale Discussions in Tennessee, 2007Mesoscale Discussions in Mississippi, 2007Every mesoscale discussion in 2007

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.