Alert archive / Oklahoma / Mesoscale Discussions in 2016

Mesoscale Discussion 611

May 11, 20164 states

The Storm Prediction Center issued this mesoscale discussion at May 11, 2016, 8:11 PM CDT for 4 states. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
May 11, 2016, 8:11 PM CDT (01:11 UTC)
Expired
May 11, 2016, 10:45 PM CDT
In force
3 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 68 counties

Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Sebastian County, AR, Washington County, AR, Barry County, MO, Christian County, MO, Douglas County, MO, Greene County, MO, Howell County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Ozark County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Webster County, MO, Wright County, MO, Adair County, OK, Atoka County, OK, Bryan County, OK, Carter County, OK, Cherokee County, OK, Cleveland County, OK, Coal County, OK, Cotton County, OK, Creek County, OK, Delaware County, OK, Garvin County, OK, Grady County, OK, Haskell County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, Love County, OK, Marshall County, OK, Mayes County, OK, McClain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Ottawa County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Stephens County, OK, Tulsa County, OK, Wagoner County, OK, Clay County, TX, Cooke County, TX, Grayson County, TX, Montague County, TX

The radar

The Tulsa radar (KINX), 91 km from the middle of the area, began a volume at 01:14 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 00:00Z, 1.2 hours before the alert went out and 168 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 2016-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1887 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 2016-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 square meters per square second.19395878Sfc1 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
1887 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
1366 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
96 m²/s²
Significant tornado parameter
0.4
Supercell composite
5.2

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 11, 10:13 PM CDTSevere Thunderstorm WatchSPCBenton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more7 hr
May 11, 11:46 PM CDTMesoscale DiscussionSPCCrawford, Franklin, Logan, Scott, Sebastian119 min
May 12, 2:48 AM CDTMesoscale DiscussionSPCCleburne, Conway, Craighead, Faulkner, Garland, Greene and 17 more87 min
May 12, 9:10 AM CDTMesoscale DiscussionSPCCraighead, Crittenden, Cross, Greene, Mississippi, Poinsett95 min
May 12, 2:33 PM CDTMesoscale DiscussionSPCAshley, Bradley, Calhoun, Chicot, Desha, Drew and 1 more87 min
May 11, 11:28 PM CDTMesoscale DiscussionSPCBollinger, Cape Girardeau, Iron, Madison, Mississippi, Perry and 2 more92 min
May 11, 10:13 PM CDTMesoscale DiscussionSPCBeckham, Greer, Harmon, Jackson, Kiowa, Tillman92 min
May 12, 2:12 AM CDTMesoscale DiscussionSPCCarter, Comanche, Cotton, Jefferson, Stephens, Tillman93 min
May 11, 7:11 PM CDTMesoscale DiscussionSPCCallahan, Eastland, Erath, Fisher, Haskell, Hood and 13 more94 min
May 11, 9:52 PM CDTMesoscale DiscussionSPCBrown, Callahan, Coleman, Comanche, Eastland, Erath and 15 more53 min
May 11, 10:55 PM CDTSevere Thunderstorm WatchSPCBrown, Callahan, Coke, Coleman, Fisher, Jones and 4 more6 hr
May 12, 3:35 AM CDTMesoscale DiscussionSPCBrown, Callahan, Coleman, Comanche, Eastland, Erath and 9 more85 min

Nearby

Mesoscale Discussions in Oklahoma, 2016Mesoscale Discussions in Missouri, 2016Mesoscale Discussions in Arkansas, 2016Every mesoscale discussion in 2016

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.