Alert archive / Illinois / River Flood Warnings in 2020

River Flood Warning 39, NWS Chicago, IL

April 29, 2020Cook County, Illinois

NWS Chicago, IL issued this river flood warning at Apr 29, 2020, 9:54 AM CDT for Cook County, Illinois. It took effect at Apr 30, 2020, 6:27 AM CDT. It was in force for 7 days.

The area

The counties it named.

The facts

Issued: Apr 29, 2020, 9:54 AM CDT (14:54 UTC)
In effect from: Apr 30, 2020, 6:27 AM CDT
Expired: May 6, 2020, 8:18 PM CDT
In force: 7 days
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Flood severity: Minor

County Cook County, IL

The radar

The Chicago radar (KLOT), 49 km from the middle of the area, began a volume at 14:55 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 Des Plaines River near Des Plaines (DSPI2). The gauge peaked at 16.96 ft at May 2, 2020, 8:00 AM CDT.

Action stage: 13.5 ft
Minor stage: 15 ft
Moderate stage: 18 ft
Major stage: 19 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05529000, 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 warning 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 warning went out at Apr 29, 6:41 AM CDT, 3 hours 13 minutes earlier.

Area forecast discussion, Apr 29, 6:41 AM CDT, 3 hours 13 minutes before

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Hazardous weather outlook, Apr 29, 4:20 AM CDT, 5 hours 34 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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In the hours before

Local storm report, Apr 29, 4:48 AM CDT, 5 hours 6 minutes before

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    <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>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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      <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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Local storm report, Apr 29, 4:49 AM CDT, 5 hours 5 minutes before

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<html lang="en">
<head>
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  <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>
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  <script src="index.js"></script>
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Local storm report, Apr 29, 8:12 AM CDT, 1 hour 42 minutes before

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<html lang="en">
<head>
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  <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 Chicago, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 29, 2:57 AM CDT	Gale Warning	LOT		36 hr
Apr 29, 2:57 AM CDT	Marine Dense Fog Advisory	LOT		7 hr
Apr 29, 3:19 AM CDT	Lakeshore Flood Warning	LOT	Cook	46 hr
Apr 29, 3:19 AM CDT	Lakeshore Flood Advisory	LOT	Cook	12 hr
Apr 29, 3:55 AM CDT	Flood Watch	LOT	Boone, Cook, DeKalb, DuPage, Kane, Kendall and 3 more	26 hr
Apr 29, 9:54 AM CDT	River Flood Warning	LOT	Lake	6 days
Apr 29, 9:54 AM CDT	River Flood Warning	LOT	Lake	8 days
Apr 29, 9:54 AM CDT	River Flood Warning	LOT	Lake	8 days
Apr 29, 9:54 AM CDT	River Flood Warning	LOT	Kane, McHenry	21 days
Apr 29, 10:47 AM CDT	River Flood Advisory	LOT	Cook	6 days
Apr 29, 10:47 AM CDT	River Flood Advisory	LOT	Cook	12 hr
Apr 29, 10:47 AM CDT	River Flood Advisory	LOT	Kane, Kendall	21 days
Apr 29, 10:47 AM CDT	River Flood Advisory	LOT	Will	71 hr
Apr 29, 10:47 AM CDT	River Flood Advisory	LOT	DuPage, Will	68 hr
Apr 29, 10:47 AM CDT	River Flood Advisory	LOT	Grundy	20 hr
Apr 29, 10:47 AM CDT	River Flood Advisory	LOT	DuPage	20 hr
Apr 29, 11:09 AM CDT	River Flood Advisory	LOT	Boone	4 days
Apr 29, 11:09 AM CDT	River Flood Advisory	LOT	Ogle	3 days
Apr 29, 11:21 AM CDT	River Flood Advisory	LOT	Grundy	10 hr
Apr 29, 11:54 AM CDT	River Flood Watch	LOT	LaSalle	10 hr
Apr 29, 11:54 AM CDT	River Flood Watch	LOT	LaSalle	5 days
Apr 29, 11:54 AM CDT	River Flood Watch	LOT	LaSalle	21 days
Apr 29, 11:54 AM CDT	River Flood Watch	LOT	Winnebago	10 hr
Apr 29, 11:54 AM CDT	River Flood Watch	LOT	LaSalle	10 hr
Apr 29, 1:46 PM CDT	River Flood Warning	LOT	DuPage, Will	65 hr
Apr 29, 1:46 PM CDT	River Flood Warning	LOT	Kane, Kendall	68 hr
Apr 29, 1:51 PM CDT	River Flood Advisory	LOT	Iroquois	61 hr
Apr 29, 2:31 PM CDT	River Flood Warning	LOT	LaSalle	4 days
Apr 29, 2:31 PM CDT	River Flood Warning	LOT	Bureau, LaSalle, Putnam	21 days
Apr 29, 10:47 AM CDT	River Flood Advisory	LOT	Lake, Newton	7 days
Apr 29, 1:12 PM CDT	River Flood Advisory	LOT	Lake	8 hr
Apr 29, 1:46 PM CDT	River Flood Warning	LOT	Lake, Newton	6 days

Nearby

River Flood Warnings in Illinois, 2020 Every river flood warning in 2020

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.