Alert archive / Mississippi / Mesoscale Discussions in 2004

Mesoscale Discussion 88

February 5, 20048 counties in Alabama; 11 parishes in Louisiana; 18 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Feb 5, 2004, 1:11 PM CST for 8 counties in Alabama; 11 parishes in Louisiana; 18 counties in Mississippi. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Feb 5, 2004, 1:11 PM CST (19:11 UTC)
Expired: Feb 5, 2004, 3:15 PM CST
In force: 2 hr
Issued by: the Storm Prediction Center

All 37 counties

Choctaw County, AL, Clarke County, AL, Greene County, AL, Hale County, AL, Marengo County, AL, Perry County, AL, Sumter County, AL, Washington County, AL, Ascension Parish, LA, Assumption Parish, LA, Lafourche Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Saint Charles Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, Clarke County, MS, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jasper County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Marion County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 103 km from the middle of the area, began a volume at 19:12 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.

Tornado Watch 7Feb 5, 4:55 PM CST

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.2 hours before the alert went out and 138 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: 772 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 446 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 338 m²/s²
0-3 km storm-relative helicity: 542 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.2

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
Feb 5, 9:52 AM CST	Mesoscale Discussion	SPC	Choctaw, Washington	113 min
Feb 5, 11:35 AM CST	Tornado Watch	SPC	Autauga, Chilton, Choctaw, Clarke, Dallas, Greene and 6 more	5 hr
Feb 5, 3:22 PM CST	Mesoscale Discussion	SPC	Choctaw, Marengo, Sumter	113 min
Feb 5, 4:43 PM CST	Mesoscale Discussion	SPC	Autauga, Chilton, Choctaw, Clarke, Dallas, Greene and 6 more	32 min
Feb 5, 4:55 PM CST	Tornado Watch	SPC	Bibb, Chilton, Choctaw, Clarke, Dallas, Greene and 10 more	6 hr
Feb 4, 11:37 PM CST	Mesoscale Discussion	SPC	Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Evangeline and 10 more	83 min
Feb 5, 1:16 AM CST	Mesoscale Discussion	SPC	Beauregard, Bienville, De Soto, Grant, Jackson, Lincoln and 6 more	119 min
Feb 5, 5:08 AM CST	Mesoscale Discussion	SPC	Acadia, Allen, Ascension, Assumption, Avoyelles, Calcasieu and 27 more	3 hr
Feb 5, 5:40 AM CST	Tornado Watch	SPC	Acadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 33 more	6 hr
Feb 5, 7:35 AM CST	Mesoscale Discussion	SPC	Acadia, Calcasieu, Cameron, East Baton Rouge, East Feliciana, Evangeline and 11 more	115 min
Feb 5, 8:02 AM CST	Mesoscale Discussion	SPC	Acadia, Calcasieu, Cameron, East Baton Rouge, East Feliciana, Evangeline and 11 more	118 min

Nearby

Mesoscale Discussions in Mississippi, 2004 Mesoscale Discussions in Louisiana, 2004 Mesoscale Discussions in Alabama, 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.