Alert archive / Illinois / River Flood Warnings in 2017

River Flood Warning 44, NWS Chicago, IL

April 5, 2017LaSalle County, Illinois

NWS Chicago, IL issued this river flood warning at Apr 5, 2017, 9:05 PM CDT for LaSalle County, Illinois. It took effect at Apr 6, 2017, 5:00 PM CDT. It was in force for 38 hr.

The area

The counties it named.

The facts

Issued: Apr 5, 2017, 9:05 PM CDT (02:05 UTC)
In effect from: Apr 6, 2017, 5:00 PM CDT
Expired: Apr 8, 2017, 7:00 AM CDT
In force: 38 hr
Issued by: NWS Chicago, IL
Area: Storm-based polygon
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 02:06 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 11.85 ft at Apr 6, 2017, 2:00 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 Apr 5, 6:51 PM CDT, 2 hours 14 minutes earlier.

Area forecast discussion, Apr 5, 6:51 PM CDT, 2 hours 14 minutes before

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Hazardous weather outlook, Apr 5, 4:20 PM CDT, 4 hours 45 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
Apr 6, 9:46 AM CDT	River Flood Advisory	LOT	Cook	29 hr
Apr 6, 9:54 AM CDT	River Flood Warning	LOT	Cook	21 hr
Apr 6, 10:37 AM CDT	River Flood Advisory	LOT	Cook	36 hr
Apr 6, 10:37 AM CDT	River Flood Advisory	LOT	Will	36 hr
Apr 6, 10:59 AM CDT	River Flood Warning	LOT	Cook	13 hr
Apr 6, 2:41 PM CDT	River Flood Warning	LOT	Will	16 hr
Apr 6, 11:05 AM CDT	River Flood Advisory	LOT	Lake	36 hr

Nearby

River Flood Warnings in Illinois, 2017 Every river flood warning in 2017

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.