Alert archive / Ohio / Mesoscale Discussions in 2004

Mesoscale Discussion 2035

August 18, 2004Monroe County, Wayne County, Michigan; 28 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Aug 18, 2004, 4:03 PM EDT for Monroe County, Wayne County, Michigan; 28 counties in Ohio. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: Aug 18, 2004, 4:03 PM EDT (20:03 UTC)
Expired: Aug 18, 2004, 5:00 PM EDT
In force: 57 min
Issued by: the Storm Prediction Center

All 30 counties

Monroe County, MI, Wayne County, MI, Allen County, OH, Ashland County, OH, Auglaize County, OH, Champaign County, OH, Crawford County, OH, Cuyahoga County, OH, Delaware County, OH, Erie County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Huron County, OH, Logan County, OH, Lorain County, OH, Lucas County, OH, Marion County, OH, Medina County, OH, Mercer County, OH, Morrow County, OH, Ottawa County, OH, Putnam County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Shelby County, OH, Union County, OH, Wood County, OH, Wyandot County, OH

The radar

The Cleveland radar (KCLE), 91 km from the middle of the area, began a volume at 20:03 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

Detroit, MI (KDTX), launched 12:00Z, 8.1 hours before the alert went out and 174 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: 145 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 557 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 84 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
Aug 17, 8:48 PM EDT	Mesoscale Discussion	SPC	Berrien, Branch, Calhoun, Cass, Hillsdale, Jackson and 8 more	117 min
Aug 18, 1:27 PM EDT	Mesoscale Discussion	SPC	Alger, Baraga, Delta, Dickinson, Gogebic, Houghton and 6 more	63 min
Aug 18, 2:10 PM EDT	Severe Thunderstorm Watch	SPC	Alger, Baraga, Delta, Dickinson, Gogebic, Iron and 5 more	7 hr
Aug 18, 4:46 PM EDT	Mesoscale Discussion	SPC	Alger, Antrim, Benzie, Charlevoix, Cheboygan, Chippewa and 19 more	59 min
Aug 18, 5:30 PM EDT	Severe Thunderstorm Watch	SPC	Alcona, Alpena, Antrim, Arenac, Benzie, Charlevoix and 23 more	6 hr
Aug 18, 6:52 PM EDT	Mesoscale Discussion	SPC	Luce	113 min
Aug 18, 7:41 PM EDT	Mesoscale Discussion	SPC	Alcona, Alpena, Antrim, Arenac, Bay, Cheboygan and 23 more	94 min
Aug 18, 6:01 PM EDT	Mesoscale Discussion	SPC	Adams, Ashland, Ashtabula, Athens, Carroll, Clinton and 40 more	89 min
Aug 18, 6:17 PM EDT	Mesoscale Discussion	SPC	Butler, Clermont, Hamilton, Preble	88 min

Nearby

Mesoscale Discussions in Ohio, 2004 Mesoscale Discussions in Michigan, 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.