Alert archive / Oklahoma / Mesoscale Discussions in 2018

Mesoscale Discussion 574

May 29, 201812 counties in Kansas; 28 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 29, 2018, 10:58 PM CDT for 12 counties in Kansas; 28 counties in Oklahoma. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: May 29, 2018, 10:58 PM CDT (03:58 UTC)
Expired: May 30, 2018, 12:30 AM CDT
In force: 92 min
Issued by: the Storm Prediction Center

All 40 counties

Allen County, KS, Chautauqua County, KS, Cherokee County, KS, Cowley County, KS, Crawford County, KS, Elk County, KS, Greenwood County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Woodson County, KS, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Craig County, OK, Creek County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, McClain County, OK, Noble County, OK, Nowata County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK, Rogers County, OK, Stephens County, OK, Tulsa County, OK, Washington County, OK

The radar

The Norman radar (KTLX), 79 km from the middle of the area, began a volume at 03:58 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, 4.0 hours before the alert went out and 96 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: 1076 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 1542 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: 119 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 29, 9:03 PM CDT	Mesoscale Discussion	SPC	Brown, Butler, Chase, Clay, Dickinson, Geary and 17 more	57 min
May 30, 3:56 PM CDT	Severe Thunderstorm Watch	SPC	Grant, Gray, Haskell, Meade, Morton, Seward and 2 more	7 hr
May 30, 5:23 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Ellis, Gove, Graham, Greeley and 12 more	3 hr
May 30, 6:22 PM CDT	Mesoscale Discussion	SPC	Grant, Haskell, Meade, Morton, Seward, Stanton and 1 more	113 min
May 29, 9:10 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 18 more	2 hr
May 29, 9:32 PM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Beckham, Blaine, Caddo, Canadian, Carter and 32 more	6 hr

Nearby

Mesoscale Discussions in Oklahoma, 2018 Mesoscale Discussions in Kansas, 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.