Alert archive / Georgia / Mesoscale Discussions in 2009

Mesoscale Discussion 1052

June 11, 20097 states

The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2009, 1:55 PM CDT for 7 states. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued
Jun 11, 2009, 1:55 PM CDT (18:55 UTC)
Expired
Jun 11, 2009, 3:00 PM CDT
In force
65 min
Issued by
the Storm Prediction Center
All 100 counties

Calhoun County, AL, Clay County, AL, Cleburne County, AL, Randolph County, AL, Talladega County, AL, Banks County, GA, Barrow County, GA, Carroll County, GA, Cherokee County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Elbert County, GA, Fayette County, GA, Forsyth County, GA, Franklin County, GA, Fulton County, GA, Gwinnett County, GA, Habersham County, GA, Hall County, GA, Haralson County, GA, Hart County, GA, Heard County, GA, Henry County, GA, Jackson County, GA, Lumpkin County, GA, Madison County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Paulding County, GA, Rabun County, GA, Rockdale County, GA, Stephens County, GA, Towns County, GA, Union County, GA, Walton County, GA, White County, GA, Bell County, KY, Breathitt County, KY, Clay County, KY, Floyd County, KY, Harlan County, KY, Knott County, KY, Knox County, KY, Leslie County, KY, Letcher County, KY, Magoffin County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Buncombe County, NC, Clay County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mitchell County, NC, Polk County, NC, Rutherford County, NC, Swain County, NC, Transylvania County, NC, Yancey County, NC, Abbeville County, SC, Anderson County, SC, Greenville County, SC, Greenwood County, SC, Laurens County, SC, Oconee County, SC, Pickens County, SC, Spartanburg County, SC, Blount County, TN, Carter County, TN, Claiborne County, TN, Cocke County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Sevier County, TN, Sullivan County, TN, Unicoi County, TN, Union County, TN, Washington County, TN, City of Bristol, VA, City of Norton, VA, Dickenson County, VA, Lee County, VA, Russell County, VA, Scott County, VA, Wise County, VA

The radar

The Knoxville radar (KMRX), 108 km from the middle of the area, began a volume at 18:58 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 6.9 hours before the alert went out and 220 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, Peachtre/Fal Fld, GA at 12:00Z on 2009-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1725 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, Peachtre/Fal Fld, GA at 12:00Z on 2009-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 square meters per square second.1939Sfc1 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
1725 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
890 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
60 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 11, 9:41 AM CDTMesoscale DiscussionSPCCherokee, DeKalb, Jackson, Marshall94 min
Jun 11, 11:18 AM CDTSevere Thunderstorm WatchSPCBanks, Barrow, Bartow, Carroll, Catoosa, Chattooga and 37 more8 hr
Jun 11, 4:58 PM CDTMesoscale DiscussionSPCBryan, Bulloch, Burke, Candler, Chatham, Effingham and 6 more62 min
Jun 10, 7:10 PM CDTMesoscale DiscussionSPCBallard, Carlisle, McCracken65 min
Jun 10, 11:06 PM CDTTornado WatchSPCBreckinridge, Bullitt, Butler, Crittenden, Daviess, Edmonson and 15 more5 hr
Jun 11, 3:15 AM CDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bath, Boone and 78 more60 min
Jun 11, 7:54 AM CDTMesoscale DiscussionSPCAllen, Simpson66 min
Jun 11, 3:07 PM CDTMesoscale DiscussionSPCBreckinridge, Daviess, Hancock, Henderson, Meade53 min
Jun 11, 3:42 PM CDTMesoscale DiscussionSPCBreckinridge, Daviess, Hancock, Henderson, Meade33 min
Jun 11, 4:47 PM CDTTornado WatchSPCAdair, Allen, Anderson, Barren, Boyle, Breckinridge and 44 more6 hr
Jun 11, 6:02 PM CDTMesoscale DiscussionSPCAdair, Allen, Ballard, Barren, Boyle, Breckinridge and 42 more58 min
Jun 11, 2:29 PM CDTMesoscale DiscussionSPCAlexander, Alleghany, Ashe, Avery, Burke, Cabarrus and 15 more61 min
Jun 11, 2:47 PM CDTSevere Thunderstorm WatchSPCAlamance, Alexander, Alleghany, Anson, Ashe, Cabarrus and 25 more6 hr
Jun 11, 5:20 PM CDTSevere Thunderstorm WatchSPCBladen, Chatham, Columbus, Cumberland, Duplin, Durham and 22 more4 hr
Jun 10, 11:07 PM CDTMesoscale DiscussionSPCShelby83 min
Jun 10, 11:49 PM CDTSevere Thunderstorm WatchSPCShelby5 hr
Jun 11, 2:38 AM CDTMesoscale DiscussionSPCCarroll, Chester, Crockett, Dyer, Fayette, Gibson and 12 more67 min
Jun 11, 8:40 AM CDTSevere Thunderstorm WatchSPCAnderson, Bedford, Benton, Bledsoe, Bradley, Campbell and 52 more5 hr
Jun 11, 10:51 AM CDTMesoscale DiscussionSPCAlbemarle, Amelia, Amherst, Appomattox, Arlington, Augusta and 60 more84 min
Jun 11, 12:59 PM CDTSevere Thunderstorm WatchSPCAlbemarle, Amelia, Appomattox, Arlington, Brunswick, Buckingham and 67 more3 hr

Nearby

Mesoscale Discussions in Georgia, 2009Mesoscale Discussions in North Carolina, 2009Mesoscale Discussions in Tennessee, 2009Every mesoscale discussion in 2009

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.