Alert archive / Mississippi / Mesoscale Discussions in 2004

Mesoscale Discussion 1708

July 16, 200410 counties in Arkansas; 9 parishes in Louisiana; 28 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jul 16, 2004, 12:23 PM CDT for 10 counties in Arkansas; 9 parishes in Louisiana; 28 counties in Mississippi. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Jul 16, 2004, 12:23 PM CDT (17:23 UTC)
Expired: Jul 16, 2004, 2:00 PM CDT
In force: 97 min
Issued by: the Storm Prediction Center

All 47 counties

Arkansas County, AR, Ashley County, AR, Chicot County, AR, Desha County, AR, Drew County, AR, Jefferson County, AR, Lee County, AR, Lincoln County, AR, Monroe County, AR, Phillips County, AR, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Adams County, MS, Bolivar County, MS, Carroll County, MS, Claiborne County, MS, Coahoma County, MS, Copiah County, MS, DeSoto County, MS, Franklin County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jefferson County, MS, Leflore County, MS, Lincoln County, MS, Madison County, MS, Panola County, MS, Quitman County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Warren County, MS, Washington County, MS, Yalobusha County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 132 km from the middle of the area, began a volume at 17:24 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 648Jul 16, 12:45 PM CDT

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 5.4 hours before the alert went out and 124 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: 3154 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 876 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.4

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
Jul 15, 7:34 PM CDT	Mesoscale Discussion	SPC	Ashley, Chicot, Drew	86 min
Jul 15, 8:01 PM CDT	Mesoscale Discussion	SPC	Benton, Bradley, Calhoun, Carroll, Clark, Cleveland and 34 more	119 min
Jul 16, 8:35 AM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Baxter, Boone, Calhoun, Carroll, Clark and 43 more	4 hr
Jul 16, 12:45 PM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 12 more	6 hr
Jul 16, 3:03 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Chicot, Cleveland, Desha and 5 more	117 min
Jul 16, 3:37 PM CDT	Mesoscale Discussion	SPC	Arkansas, Bradley, Calhoun, Clark, Cleveland, Conway and 32 more	113 min
Jul 16, 6:44 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 6 more	61 min
Jul 16, 11:42 AM CDT	Mesoscale Discussion	SPC	Washington	3 hr

Nearby

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