Alert archive / Oklahoma / Mesoscale Discussions in 2019

Mesoscale Discussion 583

May 7, 2019Chautauqua County, Cowley County, Kansas; 24 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 7, 2019, 11:49 PM CDT for Chautauqua County, Cowley County, Kansas; 24 counties in Oklahoma. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued: May 7, 2019, 11:49 PM CDT (04:49 UTC)
Expired: May 8, 2019, 12:45 AM CDT
In force: 56 min
Issued by: the Storm Prediction Center

All 26 counties

Chautauqua County, KS, Cowley County, KS, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Creek County, OK, Garvin County, OK, Grady County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, McClain County, OK, Noble County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK, Stephens County, OK, Tillman County, OK, Washington County, OK, Washita County, OK

The radar

The Norman radar (KTLX), 58 km from the middle of the area, began a volume at 04:48 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, 4.8 hours before the alert went out and 55 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: 1355 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 1174 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 152 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 5.9

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.

Issued	Product	Office	Counties	Lasted
May 7, 8:52 PM CDT	Mesoscale Discussion	SPC	Chautauqua, Montgomery	53 min
May 7, 9:13 PM CDT	Tornado Watch	SPC	Allen, Chautauqua, Cowley, Elk, Harper, Labette and 5 more	8 hr
May 7, 8:10 PM CDT	Mesoscale Discussion	SPC	Beckham, Blaine, Caddo, Canadian, Custer, Dewey and 7 more	95 min
May 7, 9:38 PM CDT	Mesoscale Discussion	SPC	Beaver, Texas	67 min
May 8, 3:47 PM CDT	Mesoscale Discussion	SPC	Beckham, Greer, Harmon, Jackson, Kiowa, Roger Mills and 1 more	118 min

Nearby

Mesoscale Discussions in Oklahoma, 2019 Mesoscale Discussions in Kansas, 2019 Every mesoscale discussion in 2019

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.