Alert archive / Georgia / Mesoscale Discussions in 2003

Mesoscale Discussion 834

May 7, 20034 counties in Alabama; 24 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at May 7, 2003, 10:09 PM CDT for 4 counties in Alabama; 24 counties in Georgia. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: May 7, 2003, 10:09 PM CDT (03:09 UTC)
Expired: May 7, 2003, 11:45 PM CDT
In force: 96 min
Issued by: the Storm Prediction Center

All 28 counties

Barbour County, AL, Chambers County, AL, Lee County, AL, Russell County, AL, Bibb County, GA, Bleckley County, GA, Chattahoochee County, GA, Crawford County, GA, Dodge County, GA, Dooly County, GA, Harris County, GA, Houston County, GA, Lamar County, GA, Macon County, GA, Marion County, GA, Meriwether County, GA, Muscogee County, GA, Peach County, GA, Pike County, GA, Pulaski County, GA, Schley County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Troup County, GA, Upson County, GA, Webster County, GA

The radar

The Atlanta radar (KFFC), 78 km from the middle of the area, began a volume at 03:11 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

Birmingham, AL (KBMX), launched 00:00Z, 3.2 hours before the alert went out and 228 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2242 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 809 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 2.4
Supercell composite: 8.2

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.

Issued	Product	Office	Counties	Lasted
May 7, 7:32 PM CDT	Mesoscale Discussion	SPC	Barbour, Bullock, Chambers, Coosa, Crenshaw, Elmore and 6 more	58 min
May 7, 7:50 PM CDT	Tornado Watch	SPC	Barbour, Chambers, Lee, Russell	5 hr
May 8, 12:04 AM CDT	Mesoscale Discussion	SPC	Barbour, Lee, Russell	56 min
May 8, 1:18 AM CDT	Mesoscale Discussion	SPC	Autauga, Barbour, Bibb, Bullock, Chilton, Elmore and 7 more	3 hr
May 8, 2:56 AM CDT	Mesoscale Discussion	SPC	Chambers, Clay, Randolph, Talladega	3 hr

Nearby

Mesoscale Discussions in Georgia, 2003 Mesoscale Discussions in Alabama, 2003 Every mesoscale discussion in 2003

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.