Alert archive / Texas / Mesoscale Discussions in 2005

Mesoscale Discussion 868

May 13, 200526 counties in Oklahoma; 32 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 13, 2005, 8:05 PM CDT for 26 counties in Oklahoma; 32 counties in Texas. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued: May 13, 2005, 8:05 PM CDT (01:05 UTC)
Expired: May 13, 2005, 9:00 PM CDT
In force: 55 min
Issued by: the Storm Prediction Center

All 58 counties

Blaine County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Creek County, OK, Custer County, OK, Dewey County, OK, Garvin County, OK, Grady County, OK, Greer County, OK, Jackson County, OK, Jefferson County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, McClain County, OK, Oklahoma County, OK, Payne County, OK, Pottawatomie County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Archer County, TX, Baylor County, TX, Brown County, TX, Callahan County, TX, Clay County, TX, Coke County, TX, Coleman County, TX, Comanche County, TX, Concho County, TX, Eastland County, TX, Fisher County, TX, Foard County, TX, Hardeman County, TX, Haskell County, TX, Irion County, TX, Jack County, TX, Jones County, TX, Knox County, TX, McCulloch County, TX, Montague County, TX, Nolan County, TX, Palo Pinto County, TX, Runnels County, TX, Shackelford County, TX, Stephens County, TX, Stonewall County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Wichita County, TX, Wilbarger County, TX, Young County, TX

The radar

The Altus AFB radar (KFDR), 22 km from the middle of the area, began a volume at 01:06 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, 1.1 hours before the alert went out and 181 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: 1864 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 960 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 123 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 5.5

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.

Issued	Product	Office	Counties	Lasted
May 13, 8:58 PM CDT	Mesoscale Discussion	SPC	Caddo, Canadian, Cleveland, Garvin, Grady, Lincoln and 5 more	92 min
May 13, 9:22 PM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coleman, Comanche, Eastland, Haskell and 5 more	83 min
May 14, 12:25 AM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coke, Coleman, Concho, Eastland and 14 more	35 min
May 14, 12:13 PM CDT	Mesoscale Discussion	SPC	Panola, Shelby	3 hr
May 14, 2:07 PM CDT	Mesoscale Discussion	SPC	Brewster, Crane, Crockett, Culberson, Ector, El Paso and 17 more	83 min
May 14, 2:55 PM CDT	Severe Thunderstorm Watch	SPC	Crane, Crockett, Culberson, Ector, Hudspeth, Jeff Davis and 9 more	7 hr

Nearby

Mesoscale Discussions in Texas, 2005 Mesoscale Discussions in Oklahoma, 2005 Every mesoscale discussion in 2005

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.