Alert archive / Texas / Mesoscale Discussions in 2026

Mesoscale Discussion 211

March 11, 202614 counties in Arkansas; 11 parishes in Louisiana; 22 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 11, 2026, 7:13 AM CDT for 14 counties in Arkansas; 11 parishes in Louisiana; 22 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Mar 11, 2026, 7:13 AM CDT (12:13 UTC)
Expired
Mar 11, 2026, 9:15 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Concerning
Severe potential...watch possible
Chance of a watch
40%
All 47 counties

Arkansas County, AR, Ashley County, AR, Bradley County, AR, Calhoun County, AR, Cleveland County, AR, Desha County, AR, Drew County, AR, Jefferson County, AR, Lee County, AR, Lincoln County, AR, Monroe County, AR, Phillips County, AR, Prairie County, AR, Union County, AR, Bienville Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Natchitoches Parish, LA, Red River Parish, LA, Sabine Parish, LA, Union Parish, LA, Webster Parish, LA, Winn Parish, LA, Angelina County, TX, Austin County, TX, Colorado County, TX, Fort Bend County, TX, Hardin County, TX, Harris County, TX, Jackson County, TX, Jasper County, TX, Liberty County, TX, Montgomery County, TX, Nacogdoches County, TX, Newton County, TX, Polk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Wharton County, TX

The radar

The Shreveport radar (KSHV), 52 km from the middle of the area, began a volume at 12:18 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 nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 0.2 hours before the alert went out and 333 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-pSkew-T log-p diagram, Jackson, MS at 12:00Z on 2026-03-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 495 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 12:00Z on 2026-03-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 175 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
495 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
609 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
175 m²/s²
0-3 km storm-relative helicity
195 m²/s²
Significant tornado parameter
0.4
Supercell composite
1.9

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.

IssuedProductOfficeCountiesLasted
Mar 10, 9:54 PM CDTMesoscale DiscussionSPCBenton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more3 hr
Mar 10, 10:18 PM CDTTornado WatchSPCBaxter, Benton, Boone, Carroll, Cleburne, Conway and 24 more7 hr
Mar 11, 2:20 AM CDTMesoscale DiscussionSPCBaxter, Boone, Clark, Cleburne, Conway, Dallas and 20 more85 min
Mar 11, 3:08 AM CDTMesoscale DiscussionSPCColumbia, Lafayette, Miller, Nevada, Ouachita97 min
Mar 11, 10:15 AM CDTMesoscale DiscussionSPCAshley, Chicot3 hr
Mar 11, 11:25 AM CDTTornado WatchSPCAcadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 20 more9 hr
Mar 11, 1:56 PM CDTMesoscale DiscussionSPCAllen, Avoyelles, Beauregard, Caldwell, Catahoula, Concordia and 12 more2 hr
Mar 11, 6:18 PM CDTMesoscale DiscussionSPCAcadia, Ascension, Assumption, Avoyelles, Concordia, East Baton Rouge and 21 more117 min
Mar 11, 6:56 PM CDTTornado WatchSPCAscension, Assumption, Concordia, East Baton Rouge, East Feliciana, Iberville and 17 more7 hr
Mar 10, 8:15 PM CDTSevere Thunderstorm WatchSPCBandera, Bell, Blanco, Bosque, Burnet, Collin and 34 more6 hr
Mar 10, 8:57 PM CDTMesoscale DiscussionSPCCollin, Cooke, Dallas, Denton, Fannin, Grayson and 6 more2 hr
Mar 10, 11:21 PM CDTMesoscale DiscussionSPCBandera, Bell, Blanco, Bosque, Burnet, Coryell and 25 more84 min

Nearby

Mesoscale Discussions in Texas, 2026Mesoscale Discussions in Arkansas, 2026Mesoscale Discussions in Louisiana, 2026Every 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.