Alert archive / Illinois / River Flood Warnings in 2011

River Flood Warning 69, NWS Chicago, IL

May 30, 2011LaSalle County, Illinois

NWS Chicago, IL issued this river flood warning at May 30, 2011, 6:18 AM CDT for LaSalle County, Illinois. It was in force for 37 hr.

The area

The counties it named.

The facts

Issued: May 30, 2011, 6:18 AM CDT (11:18 UTC)
Expired: May 31, 2011, 7:13 PM CDT
In force: 37 hr
Issued by: NWS Chicago, IL
Flood severity: Minor

County LaSalle County, IL

The radar

The Chicago radar (KLOT), 73 km from the middle of the area, began a volume at 11:18 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 Fox River at Dayton (DAYI2). The gauge peaked at 13.70 ft at May 30, 2011, 9:00 PM CDT.

Action stage: 11 ft
Minor stage: 12 ft
Moderate stage: 14 ft
Major stage: 24 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05552500, 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 May 30, 5:01 AM CDT, 1 hour 17 minutes earlier.

Area forecast discussion, May 30, 5:01 AM CDT, 1 hour 17 minutes before

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Hazardous weather outlook, May 30, 4:42 AM CDT, 1 hour 36 minutes before

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<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.
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</body>
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The office that day

Everything else NWS Chicago, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 29, 8:10 PM CDT	River Flood Warning	LOT	Cook	47 hr
May 29, 8:31 PM CDT	River Flood Advisory	LOT	LaSalle	10 hr
May 29, 9:57 PM CDT	River Flood Warning	LOT	Grundy	23 hr
May 29, 9:57 PM CDT	River Flood Warning	LOT	LaSalle	55 hr
May 30, 6:18 AM CDT	River Flood Warning	LOT	Will	14 hr
May 30, 9:37 AM CDT	Small Craft Advisory	LOT		10 hr
May 30, 3:07 PM CDT	Small Craft Advisory	LOT		31 hr

Nearby

River Flood Warnings in Illinois, 2011 Every river flood warning 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; the gauge from the NWS water service and the USGS.