Alert archive / Oklahoma / Mesoscale Discussions in 2008

Mesoscale Discussion 987

May 23, 20085 counties in Oklahoma; 5 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 23, 2008, 2:49 PM CDT for 5 counties in Oklahoma; 5 counties in Texas. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: May 23, 2008, 2:49 PM CDT (19:49 UTC)
Expired: May 23, 2008, 4:45 PM CDT
In force: 116 min
Issued by: the Storm Prediction Center

Counties Beaver County, OK, Ellis County, OK, Harper County, OK, Roger Mills County, OK, Woodward County, OK, Hemphill County, TX, Lipscomb County, TX, Ochiltree County, TX, Roberts County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 172 km from the middle of the area, began a volume at 19:49 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.

Tornado Watch 342May 23, 5:10 PM CDT

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 7.8 hours before the alert went out and 171 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: 2746 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: -63 m²/s²
0-3 km storm-relative helicity: 52 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
May 22, 8:16 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beaver, Beckham, Blaine, Canadian, Creek and 21 more	29 min
May 22, 9:11 PM CDT	Tornado Watch	SPC	Alfalfa, Blaine, Canadian, Creek, Custer, Dewey and 16 more	8 hr
May 22, 11:43 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Canadian, Creek, Custer, Dewey and 16 more	62 min
May 23, 2:01 AM CDT	Mesoscale Discussion	SPC	Alfalfa, Garfield, Grant, Kay, Kingfisher, Lincoln and 7 more	89 min
May 23, 5:09 PM CDT	Tornado Watch	SPC	Alfalfa, Beaver, Beckham, Blaine, Custer, Dewey and 11 more	8 hr

Nearby

Mesoscale Discussions in Oklahoma, 2008 Mesoscale Discussions in Texas, 2008 Every mesoscale discussion in 2008

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.