Alert archive / Ohio / Mesoscale Discussions in 2004

Mesoscale Discussion 2474

November 24, 2004Greenup County, Kentucky; 8 counties in Ohio; Wirt County, Wood County, West Virginia

The Storm Prediction Center issued this mesoscale discussion at Nov 24, 2004, 9:33 PM EST for Greenup County, Kentucky; 8 counties in Ohio; Wirt County, Wood County, West Virginia. It was in force for 27 min.

The area

The outline as issued.

The facts

Issued: Nov 24, 2004, 9:33 PM EST (02:33 UTC)
Expired: Nov 24, 2004, 10:00 PM EST
In force: 27 min
Issued by: the Storm Prediction Center

Counties Greenup County, KY, Athens County, OH, Gallia County, OH, Hocking County, OH, Jackson County, OH, Meigs County, OH, Morgan County, OH, Vinton County, OH, Washington County, OH, Wirt County, WV, Wood County, WV

The radar

The Charleston,WV radar (KRLX), 94 km from the middle of the area, began a volume at 02:33 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

Cncnati-Daytn, OH (KILN), launched 00:00Z, 2.6 hours before the alert went out and 140 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: 186 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 866 m above ground
0-6 km bulk shear: 79 kt
0-1 km storm-relative helicity: 323 m²/s²
0-3 km storm-relative helicity: 349 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.9

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
Nov 24, 7:58 PM EST	Mesoscale Discussion	SPC	Bourbon, Fleming, Greenup, Lewis, Mason, Nicholas	32 min
Nov 25, 7:12 AM EST	Mesoscale Discussion	SPC	Jefferson	63 min

Nearby

Mesoscale Discussions in Ohio, 2004 Mesoscale Discussions in West Virginia, 2004 Mesoscale Discussions in Kentucky, 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.