Alert archive / Michigan / Mesoscale Discussions in 2004

Mesoscale Discussion 703

May 14, 20047 counties in Michigan; 4 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at May 14, 2004, 6:56 PM EDT for 7 counties in Michigan; 4 counties in Ohio. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: May 14, 2004, 6:56 PM EDT (22:56 UTC)
Expired: May 14, 2004, 8:00 PM EDT
In force: 64 min
Issued by: the Storm Prediction Center

Counties Huron County, MI, Lapeer County, MI, Macomb County, MI, Monroe County, MI, Oakland County, MI, Sanilac County, MI, Wayne County, MI, Allen County, OH, Henry County, OH, Lucas County, OH, Putnam County, OH

The radar

The Detroit radar (KDTX), 48 km from the middle of the area, began a volume at 22:59 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, 10.9 hours before the alert went out and 45 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: 177 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 663 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 64 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 14, 12:38 PM EDT	Mesoscale Discussion	SPC	Allegan, Arenac, Barry, Bay, Berrien, Branch and 29 more	2 hr
May 14, 1:05 PM EDT	Severe Thunderstorm Watch	SPC	Alcona, Arenac, Barry, Bay, Branch, Calhoun and 35 more	7 hr
May 14, 3:52 PM EDT	Mesoscale Discussion	SPC	Arenac, Barry, Bay, Branch, Calhoun, Cass and 27 more	113 min

Nearby

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