Alert archive / Oklahoma / Mesoscale Discussions in 2003

Mesoscale Discussion 1803

July 13, 200334 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jul 13, 2003, 2:35 AM CDT for 34 counties in Oklahoma. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Jul 13, 2003, 2:35 AM CDT (07:35 UTC)
Expired: Jul 13, 2003, 4:30 AM CDT
In force: 115 min
Issued by: the Storm Prediction Center

All 34 counties

Alfalfa County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Comanche County, OK, Creek County, OK, Custer County, OK, Dewey County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Hughes County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, McClain County, OK, Noble County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Tulsa County, OK, Washita County, OK, Woods County, OK

The radar

The Norman radar (KTLX), 81 km from the middle of the area, began a volume at 07:37 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 nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 7.6 hours before the alert went out and 78 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: 3350 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 1897 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 355 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 33.1

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
Jul 12, 10:12 PM CDT	Mesoscale Discussion	SPC	Cherokee, Creek, Garfield, Grant, Kay, Lincoln and 15 more	2 hr
Jul 12, 11:25 PM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Blaine, Caddo, Canadian, Cleveland, Comanche and 29 more	6 hr
Jul 13, 4:11 AM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Caddo, Canadian, Cleveland, Coal and 29 more	64 min
Jul 13, 2:56 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Canadian, Garfield, Grant, Kingfisher and 2 more	94 min

Nearby

Mesoscale Discussions in Oklahoma, 2003 Every mesoscale discussion in 2003

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.