Alert archive / Georgia / Mesoscale Discussions in 2011

Mesoscale Discussion 2132

September 5, 201123 counties in Georgia; 18 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Sep 5, 2011, 1:23 PM EDT for 23 counties in Georgia; 18 counties in South Carolina. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued
Sep 5, 2011, 1:23 PM EDT (17:23 UTC)
Expired
Sep 5, 2011, 2:30 PM EDT
In force
67 min
Issued by
the Storm Prediction Center
All 41 counties

Baldwin County, GA, Burke County, GA, Columbia County, GA, Elbert County, GA, Emanuel County, GA, Glascock County, GA, Greene County, GA, Hancock County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Lincoln County, GA, McDuffie County, GA, Oglethorpe County, GA, Putnam County, GA, Richmond County, GA, Screven County, GA, Taliaferro County, GA, Treutlen County, GA, Warren County, GA, Washington County, GA, Wilkes County, GA, Wilkinson County, GA, Abbeville County, SC, Aiken County, SC, Barnwell County, SC, Cherokee County, SC, Chester County, SC, Edgefield County, SC, Fairfield County, SC, Greenwood County, SC, Lancaster County, SC, Laurens County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Union County, SC, York County, SC

The radar

The Columbia radar (KCAE), 62 km from the middle of the area, began a volume at 17:22 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 5.4 hours before the alert went out and 193 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, Charleston AFB, SC at 12:00Z on 2011-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 175 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, Charleston AFB, SC at 12:00Z on 2011-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 87 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
175 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
1017 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
87 m²/s²
0-3 km storm-relative helicity
77 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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
Sep 5, 5:26 AM EDTMesoscale DiscussionSPCClay, Early, Quitman, Seminole94 min
Sep 5, 6:35 AM EDTTornado WatchSPCBaker, Calhoun, Clay, Decatur, Dougherty, Early and 9 more10 hr
Sep 5, 8:24 AM EDTMesoscale DiscussionSPCBaldwin, Barrow, Bibb, Butts, Carroll, Chattahoochee and 42 more66 min
Sep 5, 12:01 PM EDTMesoscale DiscussionSPCBaker, Baldwin, Barrow, Bartow, Ben Hill, Berrien and 85 more29 min
Sep 5, 12:10 PM EDTTornado WatchSPCBartow, Bibb, Butts, Carroll, Chattahoochee, Chattooga and 46 more4 hr
Sep 5, 3:05 PM EDTMesoscale DiscussionSPCBaldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 75 more55 min
Sep 5, 3:42 PM EDTTornado WatchSPCBaldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 81 more7 hr
Sep 5, 4:04 PM EDTSevere Thunderstorm WatchSPCBaker, Ben Hill, Berrien, Brooks, Calhoun, Clay and 20 more6 hr
Sep 5, 4:15 PM EDTMesoscale DiscussionSPCBaker, Ben Hill, Berrien, Brooks, Calhoun, Clay and 20 more30 min
Sep 5, 5:48 PM EDTMesoscale DiscussionSPCAppling, Bacon, Brantley, Bryan, Bulloch, Camden and 19 more87 min
Sep 5, 6:12 PM EDTSevere Thunderstorm WatchSPCBurke, Richmond4 hr
Sep 5, 7:37 PM EDTMesoscale DiscussionSPCBaldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 77 more113 min

Nearby

Mesoscale Discussions in Georgia, 2011Mesoscale Discussions in South Carolina, 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.