Alert archive / Tennessee / Mesoscale Discussions in 2011

Mesoscale Discussion 1229

June 15, 20116 states

The Storm Prediction Center issued this mesoscale discussion at Jun 15, 2011, 10:54 AM CDT for 6 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 15, 2011, 10:54 AM CDT (15:54 UTC)
Expired
Jun 15, 2011, 1:00 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 130 counties

Blount County, AL, Colbert County, AL, Cullman County, AL, Etowah County, AL, Fayette County, AL, Franklin County, AL, Jackson County, AL, Jefferson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Pickens County, AL, Shelby County, AL, St. Clair County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Arkansas County, AR, Crittenden County, AR, Desha County, AR, Lee County, AR, Mississippi County, AR, Monroe County, AR, Phillips County, AR, St. Francis County, AR, Allen County, KY, Calloway County, KY, Christian County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Logan County, KY, Lyon County, KY, Marshall County, KY, Simpson County, KY, Todd County, KY, Trigg County, KY, Warren County, KY, Pemiscot County, MO, Alcorn County, MS, Benton County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Clay County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Leflore County, MS, Lowndes County, MS, Marshall County, MS, Monroe County, MS, Montgomery County, MS, Oktibbeha County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Webster County, MS, Yalobusha County, MS, Bedford County, TN, Benton County, TN, Cannon County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Coffee County, TN, Crockett County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Dyer County, TN, Fayette County, TN, Franklin 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, Jackson County, TN, Lake County, TN, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Macon County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Moore County, TN, Obion County, TN, Perry County, TN, Robertson County, TN, Rutherford County, TN, Shelby County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Tipton County, TN, Trousdale County, TN, Warren County, TN, Wayne County, TN, Weakley County, TN, Williamson County, TN, Wilson County, TN

The radar

The Columbus AFB radar (KGWX), 88 km from the middle of the area, began a volume at 15:54 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

Little Rock, AR (KLZK), launched 12:00Z, 3.9 hours before the alert went out and 145 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, Little Rock, AR at 12:00Z on 2011-06-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2133 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, Little Rock, AR at 12:00Z on 2011-06-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 149 square meters per square second.193958Sfc1 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
2133 J/kg
Mixed-layer CIN
-194 J/kg
Mixed-layer LCL
1365 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
149 m²/s²
0-3 km storm-relative helicity
206 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
Jun 15, 11:52 AM CDTSevere Thunderstorm WatchSPCColbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more9 hr
Jun 15, 3:34 PM CDTMesoscale DiscussionSPCColbert, DeKalb, Franklin, Jackson, Lauderdale, Lawrence and 3 more116 min
Jun 15, 5:53 PM CDTMesoscale DiscussionSPCColbert, DeKalb, Franklin, Jackson, Lauderdale, Lawrence and 3 more97 min
Jun 15, 12:29 AM CDTMesoscale DiscussionSPCBaxter, Boone, Carroll, Clay, Cleburne, Fulton and 13 more2 hr
Jun 15, 1:09 AM CDTSevere Thunderstorm WatchSPCBaxter, Boone, Clay, Cleburne, Conway, Craighead and 19 more4 hr
Jun 15, 4:24 AM CDTMesoscale DiscussionSPCClay96 min
Jun 15, 1:57 PM CDTMesoscale DiscussionSPCClark, Garland, Hempstead, Hot Spring, Howard, Little River and 9 more63 min
Jun 15, 2:13 PM CDTMesoscale DiscussionSPCBallard, Butler, Caldwell, Calloway, Carlisle, Christian and 20 more2 hr
Jun 15, 5:04 PM CDTSevere Thunderstorm WatchSPCAdair, Allen, Barren, Breckinridge, Bullitt, Butler and 21 more4 hr
Jun 14, 7:47 PM CDTMesoscale DiscussionSPCAdair, Andrew, Audrain, Bates, Benton, Boone and 43 more58 min
Jun 14, 8:54 PM CDTMesoscale DiscussionSPCNewton66 min
Jun 14, 9:11 PM CDTMesoscale DiscussionSPCBarry, Barton, Camden, Cedar, Christian, Dade and 23 more64 min
Jun 15, 1:55 AM CDTMesoscale DiscussionSPCAdair, Clark, Knox, Lewis, Marion, Monroe and 5 more3 hr

Nearby

Mesoscale Discussions in Tennessee, 2011Mesoscale Discussions in Mississippi, 2011Mesoscale Discussions in Alabama, 2011Every mesoscale discussion in 2011

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.