Alert archive / Oklahoma / Mesoscale Discussions in 2007

Mesoscale Discussion 444

April 10, 200711 counties in Oklahoma; 7 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 10, 2007, 2:52 PM CDT for 11 counties in Oklahoma; 7 counties in Texas. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Apr 10, 2007, 2:52 PM CDT (19:52 UTC)
Expired: Apr 10, 2007, 4:15 PM CDT
In force: 83 min
Issued by: the Storm Prediction Center

Counties Beckham County, OK, Caddo County, OK, Comanche County, OK, Cotton County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Roger Mills County, OK, Tillman County, OK, Washita County, OK, Childress County, TX, Collingsworth County, TX, Donley County, TX, Hardeman County, TX, Wheeler County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 62 km from the middle of the area, began a volume at 19:52 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.

Severe Thunderstorm Watch 121Apr 10, 3:40 PM CDT

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 7.9 hours before the alert went out and 197 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 480 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 312 m²/s²
0-3 km storm-relative helicity: 341 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Apr 10, 3:40 PM CDT	Severe Thunderstorm Watch	SPC	Beckham, Caddo, Carter, Comanche, Cotton, Garvin and 15 more	6 hr
Apr 10, 6:02 PM CDT	Mesoscale Discussion	SPC	Carter, Comanche, Cotton, Garvin, Jefferson, Stephens	88 min
Apr 10, 9:46 AM CDT	Mesoscale Discussion	SPC	Hardin, Jasper, Jefferson, Newton, Orange, Sabine	119 min

Nearby

Mesoscale Discussions in Oklahoma, 2007 Mesoscale Discussions in Texas, 2007 Every mesoscale discussion in 2007

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.