Alert archive / Oklahoma / Mesoscale Discussions in 2019

Mesoscale Discussion 700

May 20, 201911 counties in Kansas; 26 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 20, 2019, 11:35 AM CDT for 11 counties in Kansas; 26 counties in Oklahoma. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued
May 20, 2019, 11:35 AM CDT (16:35 UTC)
Expired
May 20, 2019, 1:00 PM CDT
In force
85 min
Issued by
the Storm Prediction Center
All 37 counties

Barber County, KS, Chautauqua County, KS, Comanche County, KS, Cowley County, KS, Elk County, KS, Harper County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Sumner County, KS, Wilson County, KS, Alfalfa County, OK, Blaine County, OK, Creek County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grant County, OK, Harper County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, Mayes County, OK, Noble County, OK, Nowata County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Roger Mills County, OK, Rogers County, OK, Tulsa County, OK, Washington County, OK, Woods County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 69 km from the middle of the area, began a volume at 16:37 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 4.6 hours before the alert went out and 127 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 12:00Z on 2019-05-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 79 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 12:00Z on 2019-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 260 square meters per square second.1939587897Sfc1 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
79 J/kg
Mixed-layer CIN
-389 J/kg
Mixed-layer LCL
1022 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
260 m²/s²
0-3 km storm-relative helicity
302 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.8

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
May 20, 7:09 AM CDTSevere Thunderstorm WatchSPCBarber, Chautauqua, Comanche, Cowley, Elk, Harper and 5 more6 hr
May 20, 2:15 PM CDTMesoscale DiscussionSPCBarber, Clark, Comanche, Harper, Kingman, Sumner90 min
May 20, 4:35 PM CDTMesoscale DiscussionSPCCherokee, Crawford, Labette115 min
May 20, 5:14 PM CDTTornado WatchSPCCherokee, Crawford, Labette, Montgomery8 hr
May 19, 11:56 PM CDTMesoscale DiscussionSPCCimarron2 hr
May 20, 1:57 AM CDTSevere Thunderstorm WatchSPCBeaver, Cimarron, Texas8 hr
May 20, 6:14 AM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Custer, Dewey, Ellis, Garfield and 7 more2 hr
May 20, 10:41 AM CDTMesoscale DiscussionSPCBeckham, Greer, Harmon, Jackson, Roger Mills3 hr
May 20, 11:17 AM CDTMesoscale DiscussionSPCBeckham, Blaine, Caddo, Canadian, Carter, Cleveland and 20 more2 hr
May 20, 1:21 PM CDTMesoscale DiscussionSPCCaddo, Canadian, Cleveland, Comanche, Grady, Kiowa and 3 more24 min
May 20, 1:37 PM CDTTornado Watch PDSSPCAtoka, Beckham, Blaine, Bryan, Caddo, Canadian and 41 more8 hr
May 20, 3:46 PM CDTMesoscale DiscussionSPCCanadian, Greer, Harmon, Jackson, Kingfisher, Kiowa and 1 more59 min
May 20, 5:44 PM CDTMesoscale DiscussionSPCCanadian, Greer, Harmon, Jackson, Kingfisher, Kiowa and 1 more61 min

Nearby

Mesoscale Discussions in Oklahoma, 2019Mesoscale Discussions in Kansas, 2019Every 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.