Alert archive / Alabama / Mesoscale Discussions in 2004

Mesoscale Discussion 2523

December 9, 200416 counties in Alabama; 14 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Dec 9, 2004, 6:04 AM CST for 16 counties in Alabama; 14 counties in Mississippi. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Dec 9, 2004, 6:04 AM CST (12:04 UTC)
Expired: Dec 9, 2004, 7:30 AM CST
In force: 86 min
Issued by: the Storm Prediction Center

All 30 counties

Autauga County, AL, Bibb County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Dallas County, AL, Greene County, AL, Hale County, AL, Lowndes County, AL, Marengo County, AL, Perry County, AL, Pickens County, AL, Shelby County, AL, Sumter County, AL, Tuscaloosa County, AL, Wilcox County, AL, Clarke County, MS, Covington County, MS, Jefferson Davis County, MS, Kemper County, MS, Lauderdale County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Noxubee County, MS, Rankin County, MS, Simpson County, MS, Smith County, MS, Wayne County, MS, Winston County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 104 km from the middle of the area, began a volume at 12:04 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

Jackson, MS (KJAN), launched 12:00Z, 0.1 hours before the alert went out and 114 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: 80 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 552 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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
Dec 9, 4:22 AM CST	Mesoscale Discussion	SPC	Autauga, Baldwin, Chilton, Choctaw, Clarke, Conecuh and 10 more	83 min
Dec 9, 4:45 AM CST	Tornado Watch	SPC	Autauga, Bibb, Chilton, Choctaw, Clarke, Coosa and 14 more	5 hr
Dec 9, 7:46 AM CST	Mesoscale Discussion	SPC	Autauga, Bibb, Chilton, Choctaw, Clarke, Coosa and 9 more	89 min
Dec 9, 10:24 AM CST	Mesoscale Discussion	SPC	Barbour, Dale, Geneva, Henry, Houston, Russell	2 hr

Nearby

Mesoscale Discussions in Alabama, 2004 Mesoscale Discussions in Mississippi, 2004 Every mesoscale discussion in 2004

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.