Alert archive / Mississippi / Mesoscale Discussions in 2003

Mesoscale Discussion 1352

June 12, 2003Clarke County, Mobile County, Washington County, Alabama; Orleans Parish, Saint Tammany Parish, Louisiana; 12 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jun 12, 2003, 1:15 PM CDT for Clarke County, Mobile County, Washington County, Alabama; Orleans Parish, Saint Tammany Parish, Louisiana; 12 counties in Mississippi. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued: Jun 12, 2003, 1:15 PM CDT (18:15 UTC)
Expired: Jun 12, 2003, 2:15 PM CDT
In force: 60 min
Issued by: the Storm Prediction Center

Counties Clarke County, AL, Mobile County, AL, Washington County, AL, Orleans Parish, LA, Saint Tammany Parish, LA, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Jones County, MS, Lamar County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 82 km from the middle of the area, began a volume at 18:18 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 530Jun 12, 4:40 PM CDT

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 6.3 hours before the alert went out and 88 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: 1553 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 852 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

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
Jun 11, 7:50 PM CDT	Severe Thunderstorm Watch	SPC	Bibb, Chilton, Coosa, Fayette, Greene, Hale and 10 more	5 hr
Jun 11, 9:18 PM CDT	Mesoscale Discussion	SPC	Bibb, Chilton, Fayette, Greene, Hale, Jefferson and 6 more	87 min
Jun 12, 8:51 AM CDT	Mesoscale Discussion	SPC	Washington	84 min
Jun 12, 9:10 AM CDT	Severe Thunderstorm Watch	SPC	Baldwin, Choctaw, Clarke, Mobile, Washington	5 hr
Jun 12, 11:10 AM CDT	Mesoscale Discussion	SPC	Choctaw, Clarke, Mobile, Washington	95 min
Jun 12, 1:34 PM CDT	Mesoscale Discussion	SPC	Autauga, Bibb, Blount, Chambers, Chilton, Clay and 19 more	86 min
Jun 12, 12:30 AM CDT	Mesoscale Discussion	SPC	Bossier, Caddo, De Soto	2 hr
Jun 12, 1:10 AM CDT	Severe Thunderstorm Watch	SPC	Bossier, Caddo, De Soto	4 hr
Jun 12, 4:20 AM CDT	Mesoscale Discussion	SPC	Bossier, Caddo, De Soto	55 min
Jun 12, 4:40 PM CDT	Severe Thunderstorm Watch	SPC	East Baton Rouge, East Feliciana, Livingston, Saint Helena, Saint Tammany, Tangipahoa and 2 more	4 hr
Jun 11, 7:14 PM CDT	Mesoscale Discussion	SPC	Bolivar, Calhoun, Chickasaw, Clay, Coahoma, Grenada and 8 more	2 hr

Nearby

Mesoscale Discussions in Mississippi, 2003 Mesoscale Discussions in Alabama, 2003 Mesoscale Discussions in Louisiana, 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.