Alert archive / Georgia / Mesoscale Discussions in 2008

Mesoscale Discussion 2137

August 22, 20088 counties in Florida; 38 counties in Georgia; 5 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Aug 22, 2008, 8:45 PM EDT for 8 counties in Florida; 38 counties in Georgia; 5 counties in South Carolina. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Aug 22, 2008, 8:45 PM EDT (00:45 UTC)
Expired: Aug 22, 2008, 10:45 PM EDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 51 counties

Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Duval County, FL, Hamilton County, FL, Nassau County, FL, Union County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Ben Hill County, GA, Berrien County, GA, Brantley County, GA, Brooks County, GA, Bryan County, GA, Bulloch County, GA, Camden County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Echols County, GA, Effingham County, GA, Evans County, GA, Glynn County, GA, Irwin County, GA, Jeff Davis County, GA, Lanier County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, McIntosh County, GA, Pierce County, GA, Tattnall County, GA, Telfair County, GA, Thomas County, GA, Tift County, GA, Toombs County, GA, Turner County, GA, Ware County, GA, Wayne County, GA, Wilcox County, GA, Worth County, GA, Beaufort County, SC, Charleston County, SC, Colleton County, SC, Dorchester County, SC, Jasper County, SC

The radar

The Charleston,SC radar (KCLX), 122 km from the middle of the area, began a volume at 00:45 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

Charleston AFB, SC (KCHS), launched 00:00Z, 0.8 hours before the alert went out and 206 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: 532 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 771 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 154 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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
Aug 23, 6:40 AM EDT	Mesoscale Discussion	SPC	Dixie, Lafayette, Levy, Taylor	2 hr
Aug 23, 7:18 AM EDT	Tornado Watch	SPC	Alachua, Citrus, Columbia, Dixie, Gilchrist, Hamilton and 10 more	8 hr
Aug 23, 11:35 AM EDT	Mesoscale Discussion	SPC	Columbia, Dixie, Franklin, Gadsden, Gilchrist, Hamilton and 9 more	115 min
Aug 23, 2:41 PM EDT	Mesoscale Discussion	SPC	Columbia, Dixie, Franklin, Gadsden, Gilchrist, Hamilton and 9 more	2 hr
Aug 23, 5:24 PM EDT	Tornado Watch	SPC	Dixie, Gadsden, Jefferson, Lafayette, Leon, Madison and 2 more	6 hr

Nearby

Mesoscale Discussions in Georgia, 2008 Mesoscale Discussions in Florida, 2008 Mesoscale Discussions in South Carolina, 2008 Every mesoscale discussion in 2008

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.