Alert archive / Oklahoma / Mesoscale Discussions in 2018

Mesoscale Discussion 1192

July 29, 20187 counties in Kansas; 12 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jul 29, 2018, 4:00 AM CDT for 7 counties in Kansas; 12 counties in Oklahoma. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 29, 2018, 4:00 AM CDT (09:00 UTC)
Expired: Jul 29, 2018, 6:00 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Butler County, KS, Chautauqua County, KS, Cowley County, KS, Harper County, KS, Harvey County, KS, Sedgwick County, KS, Sumner County, KS, Creek County, OK, Garfield County, OK, Grant County, OK, Kay County, OK, Noble County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 119 km from the middle of the area, began a volume at 09:02 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, 9.0 hours before the alert went out and 175 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: 2116 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 1419 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.6

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 28, 10:46 PM CDT	Mesoscale Discussion	SPC	Decatur, Gove, Graham, Logan, Norton, Rawlins and 2 more	89 min
Jul 28, 11:10 PM CDT	Mesoscale Discussion	SPC	Barber, Barton, Clark, Comanche, Edwards, Finney and 12 more	2 hr
Jul 29, 1:59 AM CDT	Severe Thunderstorm Watch	SPC	Barber, Barton, Butler, Chase, Chautauqua, Cowley and 15 more	5 hr
Jul 29, 1:46 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Rawlins, Sherman	59 min
Jul 29, 2:07 PM CDT	Tornado Watch	SPC	Greeley, Sherman, Wallace	8 hr
Jul 29, 2:34 PM CDT	Severe Thunderstorm Watch	SPC	Cheyenne, Gove, Logan, Rawlins, Sheridan, Thomas and 1 more	7 hr
Jul 29, 5:07 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Gove, Lane, Logan, Rawlins and 5 more	53 min
Jul 29, 6:23 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Greeley, Sherman, Wallace	67 min

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.