Alert archive / Oklahoma / Mesoscale Discussions in 2026

Mesoscale Discussion 1502

July 4, 20269 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jul 4, 2026, 5:34 PM CDT for 9 counties in Oklahoma. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jul 4, 2026, 5:34 PM CDT (22:34 UTC)
Expired: Jul 4, 2026, 7:00 PM CDT
In force: 86 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 460

Counties Blaine County, OK, Garfield County, OK, Grant County, OK, Kay County, OK, Kingfisher County, OK, Major County, OK, Noble County, OK, Osage County, OK, Pawnee County, OK

The radar

The Vance AFB radar (KVNX), 66 km from the middle of the area, began a volume at 22:38 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 12:00Z, 10.6 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-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: 264 J/kg
Mixed-layer CIN: -286 J/kg
Mixed-layer LCL: 1308 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: 153 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.7

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
Jul 4, 1:20 PM CDT	Mesoscale Discussion	SPC	Ellis, Roger Mills	3 hr
Jul 4, 3:49 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Craig, Creek, Garfield, Grant and 16 more	2 hr
Jul 4, 4:38 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Alfalfa, Atoka, Beckham, Blaine, Bryan and 62 more	8 hr

Nearby

Mesoscale Discussions in Oklahoma, 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.