Alert archive / Oklahoma / Mesoscale Discussions in 2018

Mesoscale Discussion 582

May 31, 2018Noble County, Pawnee County, Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 31, 2018, 1:07 AM CDT for Noble County, Pawnee County, Oklahoma. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: May 31, 2018, 1:07 AM CDT (06:07 UTC)
Expired: May 31, 2018, 2:00 AM CDT
In force: 53 min
Issued by: the Storm Prediction Center

Counties Noble County, OK, Pawnee County, OK

The radar

The Tulsa radar (KINX), 116 km from the middle of the area, began a volume at 06:08 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

Norman, OK (KOUN), launched 00:00Z, 6.1 hours before the alert went out and 141 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: 2577 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 1392 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 223 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 11.1

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 30, 8:22 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Canadian, Craig, Creek, Custer and 24 more	53 min
May 30, 9:14 PM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Blaine, Canadian, Craig, Creek, Custer and 26 more	8 hr
May 30, 10:40 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Creek, Custer, Dewey, Ellis and 14 more	2 hr
May 31, 2:59 AM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Craig, Creek, Delaware, McIntosh and 10 more	61 min

Nearby

Mesoscale Discussions in Oklahoma, 2018 Every mesoscale discussion in 2018

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.