Alert archive / North Carolina / Mesoscale Discussions in 2004

Mesoscale Discussion 928

May 26, 20047 counties in North Carolina

The Storm Prediction Center issued this mesoscale discussion at May 26, 2004, 9:40 PM EDT for 7 counties in North Carolina. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued: May 26, 2004, 9:40 PM EDT (01:40 UTC)
Expired: May 26, 2004, 10:45 PM EDT
In force: 65 min
Issued by: the Storm Prediction Center

Counties Anson County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Polk County, NC, Transylvania County, NC, Union County, NC

The radar

The Greer radar (KGSP), 52 km from the middle of the area, began a volume at 01:39 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 1.7 hours before the alert went out and 201 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: 946 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 1550 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 122 m²/s²
0-3 km storm-relative helicity: 148 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 5.3

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.

Issued	Product	Office	Counties	Lasted
May 26, 9:15 PM EDT	Severe Thunderstorm Watch	SPC	Beaufort, Bertie, Camden, Chowan, Currituck, Edgecombe and 13 more	5 hr
May 26, 11:21 PM EDT	Mesoscale Discussion	SPC	Beaufort, Camden, Chowan, Currituck, Pasquotank, Perquimans and 2 more	54 min
May 27, 3:28 AM EDT	Mesoscale Discussion	SPC	Alexander, Alleghany, Ashe, Avery, Burke, Caldwell and 6 more	92 min

Nearby

Mesoscale Discussions in North Carolina, 2004 Every mesoscale discussion in 2004

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.