Alert archive / Tennessee / Mesoscale Discussions in 2005

Mesoscale Discussion 2484

November 27, 20055 counties in Kentucky; 7 counties in Mississippi; 15 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Nov 27, 2005, 8:44 PM CST for 5 counties in Kentucky; 7 counties in Mississippi; 15 counties in Tennessee. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued
Nov 27, 2005, 8:44 PM CST (02:44 UTC)
Expired
Nov 27, 2005, 10:15 PM CST
In force
91 min
Issued by
the Storm Prediction Center
All 27 counties

Calloway County, KY, Carlisle County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Benton County, MS, DeSoto County, MS, Lafayette County, MS, Marshall County, MS, Panola County, MS, Quitman County, MS, Tate County, MS, Carroll County, TN, Chester County, TN, Crockett County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Haywood County, TN, Henry County, TN, Lauderdale County, TN, Madison County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN, Weakley County, TN

The radar

The Memphis radar (KNQA), 45 km from the middle of the area, began a volume at 02:47 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 00:00Z, 2.7 hours before the alert went out and 68 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 00:00Z on 2005-11-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 345 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 00:00Z on 2005-11-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 377 square meters per square second.1939587897117Sfc1 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
345 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
634 m above ground
0-6 km bulk shear
89 kt
0-1 km storm-relative helicity
377 m²/s²
0-3 km storm-relative helicity
418 m²/s²
Significant tornado parameter
1.0
Supercell composite
3.2

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
Nov 27, 11:26 PM CSTTornado WatchSPCBallard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 16 more7 hr
Nov 28, 12:43 AM CSTMesoscale DiscussionSPCFulton, Hickman62 min
Nov 28, 3:28 AM CSTMesoscale DiscussionSPCBallard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 15 more62 min
Nov 28, 10:52 AM CSTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bourbon, Boyle and 38 more113 min
Nov 28, 11:13 AM CSTTornado WatchSPCAdair, Allen, Anderson, Barren, Boyle, Breckinridge and 32 more7 hr
Nov 28, 2:17 PM CSTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bath, Bell and 56 more88 min
Nov 27, 11:44 PM CSTTornado WatchSPCAdams, Attala, Bolivar, Carroll, Choctaw, Claiborne and 23 more6 hr
Nov 28, 2:40 AM CSTMesoscale DiscussionSPCAdams, Attala, Carroll, Choctaw, Claiborne, Clay and 25 more95 min
Nov 28, 4:42 AM CSTMesoscale DiscussionSPCAmite, Marion, Pike, Walthall, Wilkinson93 min
Nov 28, 9:29 AM CSTMesoscale DiscussionSPCClarke, Forrest, George, Greene, Harrison, Jackson and 11 more2 hr

Nearby

Mesoscale Discussions in Tennessee, 2005Mesoscale Discussions in Mississippi, 2005Mesoscale Discussions in Kentucky, 2005Every mesoscale discussion in 2005

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.