Alert archive / Michigan / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 91, NWS Detroit, MI

September 21, 2010Shiawassee County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Sep 21, 2010, 10:07 PM EDT for Shiawassee County, Michigan. It was in force for 53 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 21, 2010, 10:07 PM EDT (02:07 UTC)
Expired: Sep 21, 2010, 11:00 PM EDT
In force: 53 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Shiawassee County, MI

The radar

The Detroit radar (KDTX), 62 km from the middle of the area, began a volume at 02:07 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 21, 8:08 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

Hazardous weather outlook, Sep 21, 8:06 PM EDT, 2 hours 1 minute before

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In the hours before

Local storm report, Sep 21, 8:58 PM EDT, 1 hour 9 minutes before

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Local storm report, Sep 21, 9:23 PM EDT, 44 minutes before

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Local storm report, Sep 21, 9:37 PM EDT, 30 minutes before

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</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>
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Local storm report, Sep 21, 9:38 PM EDT, 29 minutes before

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<head>
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</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>
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</body>
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The office that day

Everything else NWS Detroit, MI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 21, 8:21 PM EDT	Special Marine Warning	DTX		62 min
Sep 21, 8:23 PM EDT	Special Marine Warning	DTX		112 min
Sep 21, 8:33 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Midland	72 min
Sep 21, 9:17 PM EDT	Severe Thunderstorm Warning	DTX	Huron	43 min
Sep 21, 9:56 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Midland, Saginaw	79 min
Sep 21, 10:20 PM EDT	Special Marine Warning	DTX		100 min
Sep 21, 10:28 PM EDT	Severe Thunderstorm Warning	DTX	Tuscola	77 min
Sep 21, 10:30 PM EDT	Severe Thunderstorm Warning	DTX	Genesee	60 min
Sep 21, 10:55 PM EDT	Severe Thunderstorm Warning	DTX	Huron, Lapeer, Sanilac	80 min
Sep 21, 11:00 PM EDT	Special Marine Warning	DTX		90 min
Sep 21, 11:25 PM EDT	Severe Thunderstorm Warning	DTX	Saint Clair, Sanilac	52 min
Sep 21, 11:29 PM EDT	Special Marine Warning	DTX		61 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2010 Every severe thunderstorm warning in 2010

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.