Alert archive / Georgia / Mesoscale Discussions in 2006

Mesoscale Discussion 857

May 13, 20065 states

The Storm Prediction Center issued this mesoscale discussion at May 13, 2006, 11:21 PM CDT for 5 states. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued
May 13, 2006, 11:21 PM CDT (04:21 UTC)
Expired
May 14, 2006, 12:15 AM CDT
In force
54 min
Issued by
the Storm Prediction Center
All 89 counties

Blount County, AL, Calhoun County, AL, Cherokee County, AL, Cleburne County, AL, Colbert County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Franklin County, AL, Jackson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Randolph County, AL, St. Clair County, AL, Walker County, AL, Winston County, AL, Banks County, GA, Barrow County, GA, Bartow County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Cobb County, GA, Dade County, GA, Dawson County, GA, Elbert County, GA, Fannin County, GA, Floyd County, GA, Forsyth County, GA, Franklin County, GA, Gilmer County, GA, Gordon County, GA, Gwinnett County, GA, Habersham County, GA, Hall County, GA, Haralson County, GA, Hart County, GA, Jackson County, GA, Lumpkin County, GA, Madison County, GA, Murray County, GA, Paulding County, GA, Pickens County, GA, Polk County, GA, Rabun County, GA, Stephens County, GA, Towns County, GA, Union County, GA, Walker County, GA, White County, GA, Whitfield County, GA, Cherokee County, NC, Clay County, NC, Graham County, NC, Jackson County, NC, Macon County, NC, Swain County, NC, Oconee County, SC, Bedford County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Coffee County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hamilton County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Loudon County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Moore County, TN, Polk County, TN, Rhea County, TN, Sequatchie County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN

The radar

The Northeast Alabama radar (KHTX), 31 km from the middle of the area, began a volume at 04:22 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 nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 4.4 hours before the alert went out and 171 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 00:00Z on 2006-05-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 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 00:00Z on 2006-05-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 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
5 J/kg
Mixed-layer CIN
-172 J/kg
Mixed-layer LCL
2820 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
110 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
May 14, 2:22 PM CDTMesoscale DiscussionSPCBarbour, Bullock, Butler, Crenshaw, Henry, Lowndes and 5 more113 min
May 13, 7:11 PM CDTSevere Thunderstorm WatchSPCElbert, Franklin, Habersham, Hart, Rabun, Stephens5 hr
May 13, 7:51 PM CDTMesoscale DiscussionSPCBibb, Butts, Carroll, Chattahoochee, Clayton, Coweta and 20 more54 min
May 13, 10:45 PM CDTMesoscale DiscussionSPCBleckley, Crawford, Crisp, Dodge, Dooly, Houston and 13 more60 min
May 14, 4:00 AM CDTMesoscale DiscussionSPCBanks, Elbert, Franklin, Habersham, Hart, Madison and 1 more90 min
May 14, 2:32 PM CDTSevere Thunderstorm WatchSPCBryan, Bulloch, Burke, Candler, Chatham, Columbia and 11 more6 hr
May 14, 3:56 PM CDTSevere Thunderstorm WatchSPCAppling, Atkinson, Bacon, Baker, Baldwin, Ben Hill and 54 more6 hr
May 14, 3:58 PM CDTMesoscale DiscussionSPCBryan, Bulloch, Burke, Candler, Chatham, Columbia and 13 more92 min
May 14, 5:52 PM CDTTornado WatchSPCJenkins, Screven5 hr
May 14, 11:20 AM CDTMesoscale DiscussionSPCAlamance, Alexander, Alleghany, Anson, Ashe, Beaufort and 68 more115 min
May 14, 11:37 AM CDTSevere Thunderstorm WatchSPCAlamance, Alexander, Anson, Bladen, Cabarrus, Caswell and 45 more7 hr
May 14, 1:42 PM CDTMesoscale DiscussionSPCAlamance, Anson, Beaufort, Bertie, Cabarrus, Camden and 55 more63 min
May 14, 1:47 PM CDTTornado WatchSPCAlamance, Anson, Beaufort, Bertie, Camden, Carteret and 47 more7 hr
May 14, 3:35 PM CDTMesoscale DiscussionSPCBeaufort, Bertie, Camden, Carteret, Chatham, Chowan and 42 more55 min

Nearby

Mesoscale Discussions in Georgia, 2006Mesoscale Discussions in Tennessee, 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.