Alert archive / Georgia / Mesoscale Discussions in 2009

Mesoscale Discussion 736

May 6, 2009Dale County, Geneva County, Henry County, Alabama; 53 counties in Georgia; 15 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at May 6, 2009, 4:47 PM CDT for Dale County, Geneva County, Henry County, Alabama; 53 counties in Georgia; 15 counties in South Carolina. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued
May 6, 2009, 4:47 PM CDT (21:47 UTC)
Expired
May 6, 2009, 5:45 PM CDT
In force
58 min
Issued by
the Storm Prediction Center
All 71 counties

Dale County, AL, Geneva County, AL, Henry County, AL, Baldwin County, GA, Bibb County, GA, Bleckley County, GA, Bryan County, GA, Bulloch County, GA, Burke County, GA, Candler County, GA, Clay County, GA, Columbia County, GA, Crawford County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Glascock County, GA, Hancock County, GA, Houston County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Jones County, GA, Laurens County, GA, Lee County, GA, Lincoln County, GA, Macon County, GA, Marion County, GA, McDuffie County, GA, Montgomery County, GA, Peach County, GA, Pulaski County, GA, Putnam County, GA, Quitman County, GA, Randolph County, GA, Richmond County, GA, Schley County, GA, Screven County, GA, Stewart County, GA, Sumter County, GA, Taliaferro County, GA, Tattnall County, GA, Taylor County, GA, Terrell County, GA, Toombs County, GA, Treutlen County, GA, Twiggs County, GA, Warren County, GA, Washington County, GA, Webster County, GA, Wheeler County, GA, Wilkes County, GA, Wilkinson County, GA, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Colleton County, SC, Edgefield County, SC, Hampton County, SC, Jasper County, SC, Lexington County, SC, McCormick County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC

The radar

The Robins AFB radar (KJGX), 92 km from the middle of the area, began a volume at 21:47 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 nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.8 hours before the alert went out and 196 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 2009-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 749 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 2009-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 125 square meters per square second.193958Sfc1 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
749 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
526 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
125 m²/s²
0-3 km storm-relative helicity
149 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 5, 11:45 PM CDTMesoscale DiscussionSPCBlount, Calhoun, Colbert, Cullman, Etowah, Fayette and 13 more90 min
May 6, 1:27 AM CDTMesoscale DiscussionSPCBlount, Cullman, Fayette, Franklin, Jefferson, Lamar and 4 more3 hr
May 6, 3:05 AM CDTMesoscale DiscussionSPCFayette, Jefferson, Lamar, Marion, Pickens, Tuscaloosa and 1 more115 min
May 6, 4:03 AM CDTSevere Thunderstorm WatchSPCBibb, Blount, Calhoun, Cherokee, Clay, Cleburne and 27 more6 hr
May 6, 6:58 AM CDTMesoscale DiscussionSPCGreene, Pickens, Sumter3 hr
May 6, 7:22 AM CDTMesoscale DiscussionSPCBibb, Blount, Calhoun, Cherokee, Chilton, Clay and 28 more83 min
May 6, 9:04 AM CDTMesoscale DiscussionSPCAutauga, Bibb, Blount, Bullock, Butler, Calhoun and 27 more56 min
May 6, 9:27 AM CDTTornado WatchSPCAutauga, Barbour, Bibb, Blount, Bullock, Calhoun and 31 more9 hr
May 6, 12:37 PM CDTSevere Thunderstorm WatchSPCButler, Choctaw, Clarke, Conecuh, Covington, Crenshaw and 4 more6 hr
May 6, 1:57 PM CDTMesoscale DiscussionSPCBullock, Russell93 min
May 6, 7:47 AM CDTMesoscale DiscussionSPCBanks, Barrow, Clarke, Columbia, Elbert, Franklin and 17 more88 min
May 5, 7:43 PM CDTMesoscale DiscussionSPCChester, Chesterfield, Fairfield, Kershaw, Lancaster, Marlboro and 3 more62 min
May 6, 10:40 AM CDTMesoscale DiscussionSPCCherokee, Chester, Greenville, Lancaster, Laurens, Spartanburg and 2 more2 hr
May 6, 1:16 PM CDTTornado WatchSPCAbbeville, Cherokee, Chester, Chesterfield, Fairfield, Greenville and 7 more6 hr
May 6, 6:29 PM CDTMesoscale DiscussionSPCCherokee, Chester, Lancaster, Laurens, Spartanburg, Union and 1 more91 min

Nearby

Mesoscale Discussions in Georgia, 2009Mesoscale Discussions in South Carolina, 2009Mesoscale Discussions in Alabama, 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.