Alert archive / Iowa / Dense Fog Advisories in 2011

Dense Fog Advisory 2, NWS Sioux Falls, SD

February 16, 20118 counties in South Dakota; 11 counties in Iowa; 8 counties in Minnesota

NWS Sioux Falls, SD issued this dense fog advisory at Feb 16, 2011, 5:55 PM CST for 8 counties in South Dakota; 11 counties in Iowa; 8 counties in Minnesota. It took effect at Feb 16, 2011, 6:00 PM CST. It was in force for 16 hr.

The area

The counties it named.

The facts

Issued: Feb 16, 2011, 5:55 PM CST (23:55 UTC)
In effect from: Feb 16, 2011, 6:00 PM CST
Expired: Feb 17, 2011, 10:00 AM CST
In force: 16 hr
Issued by: NWS Sioux Falls, SD

All 27 counties

Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Ida County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Sioux County, IA, Woodbury County, IA, Cottonwood County, MN, Jackson County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Brookings County, SD, Clay County, SD, Lake County, SD, Lincoln County, SD, Minnehaha County, SD, Moody County, SD, Turner County, SD, Union County, SD

The radar

The Sioux Falls radar (KFSD), 56 km from the middle of the area, began a volume at 23:52 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 Sioux Falls, SD wrote its last area forecast discussion before this dense fog advisory went out at Feb 16, 3:45 PM CST, 2 hours 10 minutes earlier.

Area forecast discussion, Feb 16, 3:45 PM CST, 2 hours 10 minutes before

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Hazardous weather outlook, Feb 16, 4:55 AM CST, 13 hours before

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  <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.
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Nearby

Dense Fog Advisories in Iowa, 2011 Dense Fog Advisories in South Dakota, 2011 Dense Fog Advisories in Minnesota, 2011 Every dense fog advisory in 2011

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.