Alert archive / Illinois / River Flood Advisories in 2021

River Flood Advisory 11, NWS Chicago, IL

April 10, 2021Winnebago County, Illinois

NWS Chicago, IL issued this river flood advisory at Apr 10, 2021, 2:34 PM CDT for Winnebago County, Illinois. It was in force for 44 hr.

The area

The counties it named.

The facts

Issued: Apr 10, 2021, 2:34 PM CDT (19:34 UTC)
Expired: Apr 12, 2021, 10:28 AM CDT
In force: 44 hr
Issued by: NWS Chicago, IL
Area: Storm-based polygon

County Winnebago County, IL

The radar

The Milwaukee radar (KMKX), 86 km from the middle of the area, began a volume at 19:37 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 river

Written for the forecast point Pecatonica River near Shirland (SIRI2). The gauge peaked at 9.86 ft at Apr 13, 2021, 10:00 AM CDT.

Action stage: 11 ft
Minor stage: 12 ft
Moderate stage: 14 ft
Major stage: 15.5 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05437050, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

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

NWS Chicago, IL wrote its last area forecast discussion before this river flood advisory went out at Apr 9, 6:49 PM CDT, 19 hours 45 minutes earlier.

Area forecast discussion, Apr 9, 6:49 PM CDT, 19 hours 45 minutes before

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Hazardous weather outlook, Apr 9, 4:15 PM CDT, 22 hours 19 minutes before

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  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <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

River Flood Advisories in Illinois, 2021 Every river flood advisory in 2021

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; the gauge from the NWS water service and the USGS.