Alert archive / Mississippi / Mesoscale Discussions in 2026

Mesoscale Discussion 657

May 6, 2026Concordia Parish, Saint Helena Parish, Louisiana; 22 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at May 6, 2026, 6:07 PM CDT for Concordia Parish, Saint Helena Parish, Louisiana; 22 counties in Mississippi. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: May 6, 2026, 6:07 PM CDT (23:07 UTC)
Expired: May 6, 2026, 7:30 PM CDT
In force: 83 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 186

All 24 counties

Concordia Parish, LA, Saint Helena Parish, LA, Adams County, MS, Amite County, MS, Claiborne County, MS, Copiah County, MS, Covington County, MS, Franklin County, MS, Hinds County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Walthall County, MS, Wilkinson County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 62 km from the middle of the area, began a volume at 23:08 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, 11.1 hours before the alert went out and 63 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: 310 J/kg
Mixed-layer CIN: -259 J/kg
Mixed-layer LCL: 608 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 202 m²/s²
0-3 km storm-relative helicity: 227 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

<!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
May 6, 11:57 AM CDT	Mesoscale Discussion	SPC	Avoyelles, Catahoula, Concordia, East Feliciana, LaSalle, Saint Helena and 4 more	3 hr
May 6, 2:14 PM CDT	Tornado Watch	SPC	Allen, Avoyelles, Beauregard, Caldwell, Catahoula, Concordia and 18 more	9 hr
May 6, 3:14 PM CDT	Mesoscale Discussion	SPC	Concordia	2 hr
May 5, 8:59 PM CDT	Mesoscale Discussion	SPC	DeSoto	2 hr
May 6, 12:54 AM CDT	Mesoscale Discussion	SPC	Alcorn, Benton, Coahoma, DeSoto, Lafayette, Marshall and 8 more	2 hr

Nearby

Mesoscale Discussions in Mississippi, 2026 Mesoscale Discussions in Louisiana, 2026 Every mesoscale discussion in 2026

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.