Alert archive / Illinois / River Flood Advisories in 2021

River Flood Advisory 15, NWS Chicago, IL

May 10, 2021Iroquois County, Illinois; Newton County, Indiana

NWS Chicago, IL issued this river flood advisory at May 10, 2021, 8:30 AM CDT for Iroquois County, Illinois; Newton County, Indiana. It was in force for 23 hr.

The area

The counties it named.

The facts

Issued: May 10, 2021, 8:30 AM CDT (13:30 UTC)
Expired: May 11, 2021, 7:58 AM CDT
In force: 23 hr
Issued by: NWS Chicago, IL
Area: Storm-based polygon

Counties Iroquois County, IL, Newton County, IN

The radar

The Chicago radar (KLOT), 93 km from the middle of the area, began a volume at 13:29 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 Iroquois River at Iroquois (IRQI2). The gauge peaked at 16.69 ft at May 11, 2021, 4:00 PM CDT.

Action stage: 17 ft
Minor stage: 18 ft
Moderate stage: 24 ft
Major stage: 25 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05525000, 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 May 10, 6:43 AM CDT, 1 hour 47 minutes earlier.

Area forecast discussion, May 10, 6:43 AM CDT, 1 hour 47 minutes before

<!doctype html>
<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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, May 10, 3:48 AM CDT, 4 hours 42 minutes before

<!doctype html>
<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.
      </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
May 10, 12:51 PM CDT	River Flood Advisory	LOT	LaSalle	30 hr
May 10, 12:51 PM CDT	River Flood Advisory	LOT	Bureau, LaSalle, Putnam	60 hr
May 10, 2:23 PM CDT	Frost Advisory	LOT	Boone, Cook, DeKalb, DuPage, Kane, Lake and 3 more	18 hr
May 10, 4:06 PM CDT	Special Weather Statement	LOT	LaSalle	54 min
May 10, 8:00 AM CDT	River Flood Advisory	LOT	Newton	3 days

Nearby

River Flood Advisories in Illinois, 2021 River Flood Advisories in Indiana, 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.