Alert archive / Oklahoma / Mesoscale Discussions in 2017

Mesoscale Discussion 1453

August 5, 2017Chautauqua County, Cowley County, Kansas; 20 counties in Oklahoma; Collingsworth County, Wheeler County, Texas

The Storm Prediction Center issued this mesoscale discussion at Aug 5, 2017, 9:17 PM CDT for Chautauqua County, Cowley County, Kansas; 20 counties in Oklahoma; Collingsworth County, Wheeler County, Texas. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Aug 5, 2017, 9:17 PM CDT (02:17 UTC)
Expired
Aug 5, 2017, 10:45 PM CDT
In force
88 min
Issued by
the Storm Prediction Center
All 24 counties

Chautauqua County, KS, Cowley County, KS, Beckham County, OK, Blaine County, OK, Canadian County, OK, Custer County, OK, Dewey County, OK, Garfield County, OK, Grant County, OK, Greer County, OK, Kay County, OK, Kingfisher County, OK, Logan County, OK, Major County, OK, Noble County, OK, Nowata County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Roger Mills County, OK, Washington County, OK, Washita County, OK, Collingsworth County, TX, Wheeler County, TX

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 2.3 hours before the alert went out and 124 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-pSkew-T log-p diagram, Norman, OK at 00:00Z on 2017-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 415 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 2017-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
415 J/kg
Mixed-layer CIN
-64 J/kg
Mixed-layer LCL
2366 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
220 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

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.

IssuedProductOfficeCountiesLasted
Aug 5, 7:04 PM CDTSevere Thunderstorm WatchSPCChautauqua, Elk, Labette, Montgomery, Wilson9 hr
Aug 5, 11:46 PM CDTMesoscale DiscussionSPCBlaine, Canadian, Craig, Creek, Custer, Kingfisher and 15 more59 min
Aug 6, 3:11 PM CDTMesoscale DiscussionSPCBryan, Carter, Cotton, Jefferson, Love, Marshall and 1 more2 hr

Nearby

Mesoscale Discussions in Oklahoma, 2017Mesoscale Discussions in Kansas, 2017Mesoscale Discussions in Texas, 2017Every mesoscale discussion in 2017

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.