Alert archive / Michigan / Mesoscale Discussions in 2013

Mesoscale Discussion 1874

September 11, 20138 counties in Indiana; 25 counties in Michigan; Fulton County, Lucas County, Williams County, Ohio

The Storm Prediction Center issued this mesoscale discussion at Sep 11, 2013, 4:21 PM EDT for 8 counties in Indiana; 25 counties in Michigan; Fulton County, Lucas County, Williams County, Ohio. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: Sep 11, 2013, 4:21 PM EDT (20:21 UTC)
Expired: Sep 11, 2013, 6:15 PM EDT
In force: 114 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

All 36 counties

DeKalb County, IN, Elkhart County, IN, LaGrange County, IN, LaPorte County, IN, Noble County, IN, Porter County, IN, Saint Joseph County, IN, Steuben County, IN, Berrien County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Clinton County, MI, Eaton County, MI, Genesee County, MI, Hillsdale County, MI, Ingham County, MI, Jackson County, MI, Kalamazoo County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Monroe County, MI, Oakland County, MI, Saginaw County, MI, Saint Clair County, MI, Saint Joseph County, MI, Sanilac County, MI, Shiawassee County, MI, Tuscola County, MI, Washtenaw County, MI, Wayne County, MI, Fulton County, OH, Lucas County, OH, Williams County, OH

The radar

The Detroit radar (KDTX), 60 km from the middle of the area, began a volume at 20:23 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 522Sep 11, 4:40 PM EDT

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
Sep 11, 4:39 PM EDT	Severe Thunderstorm Watch	SPC	Elkhart, LaGrange, LaPorte, Saint Joseph, Steuben	4 hr
Sep 11, 11:42 AM EDT	Mesoscale Discussion	SPC	Ashland, Ashtabula, Belmont, Carroll, Columbiana, Coshocton and 18 more	63 min
Sep 11, 12:33 PM EDT	Severe Thunderstorm Watch	SPC	Ashland, Ashtabula, Belmont, Carroll, Columbiana, Coshocton and 22 more	8 hr
Sep 11, 2:47 PM EDT	Mesoscale Discussion	SPC	Ashtabula, Belmont, Carroll, Columbiana, Cuyahoga, Geauga and 14 more	58 min

Nearby

Mesoscale Discussions in Michigan, 2013 Mesoscale Discussions in Indiana, 2013 Mesoscale Discussions in Ohio, 2013 Every mesoscale discussion in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.