Alert archive / Iowa / Dense Fog Advisories in 2012

Dense Fog Advisory 4, NWS Des Moines, IA

February 1, 201220 counties in Iowa

NWS Des Moines, IA issued this dense fog advisory at Feb 1, 2012, 7:38 PM CST for 20 counties in Iowa. It was in force for 16 hr.

The area

The counties it named.

The facts

Issued: Feb 1, 2012, 7:38 PM CST (01:38 UTC)
Expired: Feb 2, 2012, 12:00 PM CST
In force: 16 hr
Issued by: NWS Des Moines, IA

Counties Black Hawk County, IA, Bremer County, IA, Butler County, IA, Cerro Gordo County, IA, Franklin County, IA, Grundy County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Jasper County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Poweshiek County, IA, Story County, IA, Tama County, IA, Wapello County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA

The radar

The Des Moines radar (KDMX), 88 km from the middle of the area, began a volume at 01:41 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 Feb 1, 5:38 PM CST, 2 hours earlier.

Area forecast discussion, Feb 1, 5:38 PM CST, 2 hours before

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Hazardous weather outlook, Feb 1, 3:44 PM CST, 3 hours 54 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>
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In the hours before

Special weather statement, Feb 1, 6:00 PM CST, 1 hour 38 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
Feb 2, 4:34 AM CST	Winter Storm Watch	DMX	Adair, Adams, Audubon, Boone, Calhoun, Carroll and 19 more	35 hr
Feb 2, 12:00 PM CST	Dense Fog Advisory	DMX	Black Hawk, Bremer	118 min
Feb 2, 3:41 PM CST	Dense Fog Advisory	DMX	Black Hawk, Bremer, Butler, Cerro Gordo, Davis, Franklin and 13 more	14 hr

Nearby

Dense Fog Advisories in Iowa, 2012 Every dense fog advisory in 2012

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.