Alert archive / Iowa / Dense Fog Advisories in 2017

Dense Fog Advisory 13, NWS Des Moines, IA

May 27, 201717 counties in Iowa

NWS Des Moines, IA issued this dense fog advisory at May 27, 2017, 4:12 AM CDT for 17 counties in Iowa. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: May 27, 2017, 4:12 AM CDT (09:12 UTC)
Expired: May 27, 2017, 10:00 AM CDT
In force: 6 hr
Issued by: NWS Des Moines, IA

Counties Black Hawk County, IA, Bremer County, IA, Butler County, IA, Grundy County, IA, Hardin County, IA, Jasper County, IA, Lucas County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Monroe County, IA, Polk County, IA, Poweshiek County, IA, Story County, IA, Tama County, IA, Wapello County, IA, Warren County, IA

The radar

The Des Moines radar (KDMX), 68 km from the middle of the area, began a volume at 09:14 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.

What forecasters said that day

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

NWS Des Moines, IA wrote its last area forecast discussion before this dense fog advisory went out at May 27, 3:40 AM CDT, 32 minutes earlier.

Area forecast discussion, May 27, 3:40 AM CDT, 32 minutes before

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Hazardous weather outlook, May 26, 3:43 PM CDT, 12 hours 29 minutes before

<!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>

In the hours before

Special weather statement, May 27, 2:33 AM CDT, 1 hour 39 minutes before

<!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>

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 27, 8:49 AM CDT	Special Weather Statement	DMX	Ringgold, Taylor	56 min
May 27, 8:59 AM CDT	Special Weather Statement	DMX	Cass	61 min
May 27, 9:04 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Cass	28 min
May 27, 9:49 AM CDT	Special Weather Statement	DMX	Union	41 min
May 27, 9:58 AM CDT	Special Weather Statement	DMX	Cass	47 min
May 27, 10:00 AM CDT	Special Weather Statement	DMX	Audubon	60 min
May 27, 10:31 AM CDT	Special Weather Statement	DMX	Madison	44 min
May 27, 11:39 AM CDT	Special Weather Statement	DMX	Polk	36 min
May 27, 12:08 PM CDT	Special Weather Statement	DMX	Story	37 min
May 27, 3:55 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Poweshiek	35 min

Nearby

Dense Fog Advisories in Iowa, 2017 Every dense fog advisory in 2017

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.