Alert archive / Tennessee / Mesoscale Discussions in 2006

Mesoscale Discussion 2005

September 22, 20069 counties in Alabama; 17 counties in Mississippi; 20 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Sep 22, 2006, 1:11 PM CDT for 9 counties in Alabama; 17 counties in Mississippi; 20 counties in Tennessee. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued
Sep 22, 2006, 1:11 PM CDT (18:11 UTC)
Expired
Sep 22, 2006, 2:45 PM CDT
In force
94 min
Issued by
the Storm Prediction Center
All 46 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, Winston County, AL, Alcorn County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Clay County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Lowndes County, MS, Monroe County, MS, Oktibbeha County, MS, Pontotoc County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Webster County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Decatur County, TN, Gibson County, TN, Giles County, TN, Hardeman County, TN, Hardin County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Humphreys County, TN, Lawrence County, TN, Lewis County, TN, Madison County, TN, Maury County, TN, McNairy County, TN, Perry County, TN, Wayne County, TN, Weakley County, TN

The radar

The Columbus AFB radar (KGWX), 92 km from the middle of the area, began a volume at 18:13 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, 6.2 hours before the alert went out and 140 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 2006-09-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2207 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 2006-09-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 268 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
2207 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
574 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
268 m²/s²
0-3 km storm-relative helicity
289 m²/s²
Significant tornado parameter
3.2
Supercell composite
13.4

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
Sep 22, 2:10 PM CDTTornado WatchSPCBlount, Calhoun, Clay, Colbert, Coosa, Cullman and 18 more5 hr
Sep 22, 6:15 PM CDTMesoscale DiscussionSPCBlount, Colbert, Cullman, Fayette, Franklin, Jefferson and 7 more60 min
Sep 22, 4:08 AM CDTMesoscale DiscussionSPCCoahoma, DeSoto, Marshall, Quitman, Tate, Tunica67 min
Sep 22, 4:39 AM CDTTornado WatchSPCAlcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 16 more5 hr
Sep 22, 8:35 AM CDTMesoscale DiscussionSPCCoahoma, DeSoto, Panola, Quitman, Tate, Tunica85 min
Sep 22, 9:10 AM CDTTornado Watch PDSSPCCoahoma, DeSoto, Marshall, Panola, Quitman, Tate and 1 more9 hr
Sep 22, 12:15 PM CDTMesoscale DiscussionSPCBenton, Bolivar, Coahoma, DeSoto, Lafayette, Marshall and 7 more90 min
Sep 22, 3:00 PM CDTMesoscale DiscussionSPCBenton, Bolivar, Coahoma, DeSoto, Lafayette, Marshall and 6 more90 min
Sep 22, 2:55 PM CDTMesoscale DiscussionSPCBenton, Henry, Obion, Stewart, Weakley2 hr
Sep 22, 6:29 PM CDTTornado WatchSPCCarroll, Crockett, Dyer, Gibson, Haywood, Henry and 6 more7 hr

Nearby

Mesoscale Discussions in Tennessee, 2006Mesoscale Discussions in Mississippi, 2006Mesoscale Discussions in Alabama, 2006Every mesoscale discussion in 2006

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.