Alert archive / Georgia / Mesoscale Discussions in 2009

Mesoscale Discussion 735

May 6, 2009Bullock County, Russell County, Alabama; 37 counties in Georgia; Abbeville County, South Carolina

The Storm Prediction Center issued this mesoscale discussion at May 6, 2009, 1:57 PM CDT for Bullock County, Russell County, Alabama; 37 counties in Georgia; Abbeville County, South Carolina. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
May 6, 2009, 1:57 PM CDT (18:57 UTC)
Expired
May 6, 2009, 3:30 PM CDT
In force
93 min
Issued by
the Storm Prediction Center
All 40 counties

Bullock County, AL, Russell County, AL, Barrow County, GA, Bibb County, GA, Butts County, GA, Chattahoochee County, GA, Clarke County, GA, Crawford County, GA, Elbert County, GA, Fayette County, GA, Greene County, GA, Gwinnett County, GA, Harris County, GA, Hart County, GA, Henry County, GA, Jackson County, GA, Jasper County, GA, Jones County, GA, Lamar County, GA, Madison County, GA, Marion County, GA, Meriwether County, GA, Monroe County, GA, Morgan County, GA, Muscogee County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Pike County, GA, Putnam County, GA, Rockdale County, GA, Schley County, GA, Spalding County, GA, Talbot County, GA, Taliaferro County, GA, Taylor County, GA, Upson County, GA, Walton County, GA, Wilkes County, GA, Abbeville County, SC

The radar

The Atlanta radar (KFFC), 61 km from the middle of the area, began a volume at 18:56 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, 7.0 hours before the alert went out and 55 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, 4:47 PM CDTMesoscale DiscussionSPCDale, Geneva, Henry58 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 Alabama, 2009Mesoscale Discussions in South Carolina, 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.