Alert archive / Oklahoma / Mesoscale Discussions in 2015

Mesoscale Discussion 731

May 23, 201544 counties in Oklahoma; 13 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 23, 2015, 8:57 PM CDT for 44 counties in Oklahoma; 13 counties in Texas. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
May 23, 2015, 8:57 PM CDT (01:57 UTC)
Expired
May 23, 2015, 10:30 PM CDT
In force
93 min
Issued by
the Storm Prediction Center
All 57 counties

Adair County, OK, Atoka County, OK, Bryan County, OK, Carter County, OK, Cherokee County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Craig 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, Nowata 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, Tillman County, OK, Tulsa County, OK, Wagoner County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Cooke County, TX, Denton County, TX, Fannin County, TX, Grayson County, TX, Jack County, TX, Montague County, TX, Wichita County, TX, Wilbarger County, TX, Wise County, TX, Young County, TX

The radar

The Norman radar (KTLX), 69 km from the middle of the area, began a volume at 02:01 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, 2.0 hours before the alert went out and 67 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 2015-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1041 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 2015-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 309 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
1041 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
590 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
309 m²/s²
0-3 km storm-relative helicity
342 m²/s²
Significant tornado parameter
2.0
Supercell composite
24.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

<!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 23, 10:49 PM CDTMesoscale DiscussionSPCAdair, Cherokee, Choctaw, Craig, Delaware, Haskell and 11 more86 min
May 24, 3:16 AM CDTMesoscale DiscussionSPCBryan, Choctaw, LeFlore, Pushmataha59 min
May 23, 8:39 PM CDTMesoscale DiscussionSPCAtascosa, Bastrop, Bee, Bexar, Blanco, Caldwell and 18 more2 hr
May 23, 9:46 PM CDTMesoscale DiscussionSPCAnderson, Austin, Bell, Bosque, Brazos, Burleson and 28 more89 min
May 23, 10:00 PM CDTTornado WatchSPCAnderson, Austin, Bell, Bosque, Brazos, Burleson and 34 more6 hr
May 23, 10:31 PM CDTSevere Thunderstorm WatchSPCAransas, Brooks, Cameron, Hidalgo, Jim Hogg, Jim Wells and 8 more5 hr
May 23, 11:32 PM CDTMesoscale DiscussionSPCAnderson, Atascosa, Austin, Bell, Brazos, Burleson and 36 more88 min
May 23, 11:52 PM CDTMesoscale DiscussionSPCBrooks, Cameron, Duval, Hidalgo, Jim Wells, Kenedy and 3 more83 min
May 23, 11:59 PM CDTMesoscale DiscussionSPCBandera, Gillespie, Kendall, Kerr, Kinney, Real and 2 more91 min
May 24, 2:12 AM CDTMesoscale DiscussionSPCAransas, Brazoria, Calhoun, Cameron, Fort Bend, Jackson and 4 more93 min
May 24, 12:05 PM CDTMesoscale DiscussionSPCBowie, Cass, Marion115 min
May 24, 12:34 PM CDTTornado WatchSPCBowie, Cass, Morris6 hr
May 24, 3:15 PM CDTMesoscale DiscussionSPCArmstrong, Briscoe, Callahan, Childress, Coleman, Collingsworth and 26 more90 min

Nearby

Mesoscale Discussions in Oklahoma, 2015Mesoscale Discussions in Texas, 2015Every mesoscale discussion in 2015

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.