Alert archive / Michigan / Mesoscale Discussions in 2004

Mesoscale Discussion 726

May 17, 200425 counties in Michigan; Fulton County, Williams County, Ohio

The Storm Prediction Center issued this mesoscale discussion at May 17, 2004, 5:46 PM EDT for 25 counties in Michigan; Fulton County, Williams County, Ohio. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: May 17, 2004, 5:46 PM EDT (21:46 UTC)
Expired: May 17, 2004, 7:15 PM EDT
In force: 89 min
Issued by: the Storm Prediction Center

All 27 counties

Arenac County, MI, Bay County, MI, Clinton County, MI, Genesee County, MI, Gladwin County, MI, Gratiot County, MI, Hillsdale County, MI, Huron County, MI, Ingham County, MI, Jackson County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Midland County, MI, Monroe County, MI, Oakland County, MI, Ogemaw County, MI, Saginaw County, MI, Saint Clair County, MI, Sanilac County, MI, Shiawassee County, MI, Tuscola County, MI, Washtenaw County, MI, Wayne County, MI, Fulton County, OH, Williams County, OH

The radar

The Detroit radar (KDTX), 33 km from the middle of the area, began a volume at 21:45 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, 9.8 hours before the alert went out and 37 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: 694 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 188 m²/s²
0-3 km storm-relative helicity: 252 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 17, 11:22 AM EDT	Mesoscale Discussion	SPC	Allegan, Barry, Berrien, Branch, Calhoun, Cass and 26 more	2 hr
May 17, 1:05 PM EDT	Severe Thunderstorm Watch	SPC	Allegan, Barry, Bay, Branch, Calhoun, Cass and 29 more	7 hr
May 17, 1:41 PM EDT	Mesoscale Discussion	SPC	Menominee	3 hr
May 17, 4:05 PM EDT	Mesoscale Discussion	SPC	Alcona, Alpena, Antrim, Arenac, Barry, Bay and 44 more	85 min
May 17, 2:09 PM EDT	Mesoscale Discussion	SPC	Adams, Allen, Auglaize, Brown, Butler, Champaign and 21 more	2 hr
May 17, 2:45 PM EDT	Severe Thunderstorm Watch	SPC	Ashland, Crawford, Cuyahoga, Erie, Geauga, Hancock and 12 more	5 hr
May 17, 5:23 PM EDT	Mesoscale Discussion	SPC	Ashland, Crawford, Cuyahoga, Erie, Geauga, Hancock and 12 more	2 hr
May 17, 6:50 PM EDT	Mesoscale Discussion	SPC	Ashtabula, Columbiana, Geauga, Mahoning, Medina, Portage and 4 more	85 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.