Alert archive / Missouri / Mesoscale Discussions in 2026

Mesoscale Discussion 564

April 27, 20266 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Apr 27, 2026, 5:59 AM CDT for 6 counties in Missouri. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued
Apr 27, 2026, 5:59 AM CDT (10:59 UTC)
Expired
Apr 27, 2026, 7:30 AM CDT
In force
91 min
Issued by
the Storm Prediction Center
Concerning
Severe thunderstorm watch 156

Counties Cass County, MO, Cooper County, MO, Johnson County, MO, Lafayette County, MO, Pettis County, MO, Saline County, MO

The radar

The Pleasant Hill radar (KEAX), 72 km from the middle of the area, began a volume at 10:59 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

Topeka, KS (KTOP), launched 00:00Z, 11.0 hours before the alert went out and 192 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, Topeka, KS at 00:00Z on 2026-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 99 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, Topeka, KS at 00:00Z on 2026-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 236 square meters per square second.19395878Sfc1 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
99 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
644 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
236 m²/s²
0-3 km storm-relative helicity
443 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.4

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
Apr 26, 7:40 PM CDTMesoscale DiscussionSPCMcDonald, Newton65 min
Apr 26, 8:38 PM CDTMesoscale DiscussionSPCAndrew, Buchanan, Clay, Clinton, DeKalb, Gentry and 3 more2 hr
Apr 26, 9:11 PM CDTSevere Thunderstorm WatchSPCAndrew, Bates, Buchanan, Carroll, Cass, Clay and 11 more7 hr
Apr 26, 10:22 PM CDTMesoscale DiscussionSPCBarry, Barton, Cedar, Christian, Dade, Dallas and 18 more113 min
Apr 26, 10:56 PM CDTMesoscale DiscussionSPCMcDonald94 min
Apr 27, 12:50 AM CDTMesoscale DiscussionSPCCrawford, Dent, Franklin, Gasconade, Iron, Osage and 3 more55 min
Apr 27, 1:39 AM CDTMesoscale DiscussionSPCCass, Clay, Jackson, Platte96 min
Apr 27, 3:24 AM CDTMesoscale DiscussionSPCCaldwell, Carroll, Cass, Chariton, Clay, Clinton and 13 more96 min
Apr 27, 3:46 AM CDTSevere Thunderstorm WatchSPCBates, Benton, Buchanan, Caldwell, Carroll, Cass and 21 more6 hr
Apr 27, 4:07 AM CDTSevere Thunderstorm WatchSPCAudrain, Bollinger, Boone, Butler, Callaway, Cape Girardeau and 32 more6 hr
Apr 27, 7:36 AM CDTMesoscale DiscussionSPCAudrain, Boone, Callaway, Cape Girardeau, Cole, Franklin and 17 more84 min
Apr 27, 9:33 AM CDTMesoscale DiscussionSPCAudrain, Bates, Benton, Boone, Callaway, Camden and 23 more117 min
Apr 27, 11:56 AM CDTMesoscale DiscussionSPCBenton, Callaway, Camden, Cole, Franklin, Gasconade and 12 more2 hr
Apr 27, 12:50 PM CDTTornado WatchSPCAudrain, Benton, Boone, Callaway, Camden, Christian and 43 more9 hr
Apr 27, 1:44 PM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Dunklin, Mississippi and 7 more2 hr
Apr 27, 1:55 PM CDTMesoscale DiscussionSPCBarry, Barton, Bates, Cass, Cedar, Dade and 7 more95 min
Apr 27, 2:07 PM CDTSevere Thunderstorm WatchSPCBarry, Barton, Bates, Cass, Cedar, Cooper and 14 more7 hr
Apr 27, 2:46 PM CDTTornado Watch PDSSPCBollinger, Butler, Cape Girardeau, Carter, Dunklin, Mississippi and 7 more7 hr
Apr 27, 3:55 PM CDTMesoscale DiscussionSPCAudrain, Boone, Callaway, Camden, Cole, Crawford and 25 more2 hr
Apr 27, 6:18 PM CDTMesoscale DiscussionSPCCape Girardeau, Dunklin, Mississippi, New Madrid, Pemiscot, Scott and 1 more87 min

Nearby

Mesoscale Discussions in Missouri, 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.