Alert archive / Illinois / River Flood Watches in 2021

River Flood Watch 3, NWS Chicago, IL

October 23, 2021Cook County, Illinois; Lake County, Indiana

NWS Chicago, IL issued this river flood watch at Oct 23, 2021, 9:57 PM CDT for Cook County, Illinois; Lake County, Indiana. It took effect at Oct 25, 2021, 6:00 AM CDT. It was in force for .

The area

The counties it named.

The facts

Issued: Oct 23, 2021, 9:57 PM CDT (02:57 UTC)
In effect from: Oct 25, 2021, 6:00 AM CDT
Expired: Oct 24, 2021, 10:08 AM CDT
In force
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Flood severity: None

Counties Cook County, IL, Lake County, IN

The radar

The Chicago radar (KLOT), 48 km from the middle of the area, began a volume at 02:56 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 Little Calumet River at Munster (LCMI3).

Action stage: 11.5 ft
Minor stage: 12 ft
Moderate stage: 14 ft
Major stage: 17 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05536195, 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 watch 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 watch went out at Oct 23, 9:10 PM CDT, 47 minutes earlier.

Area forecast discussion, Oct 23, 9:10 PM CDT, 47 minutes before

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Hazardous weather outlook, Oct 23, 3:17 PM CDT, 6 hours 40 minutes before

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</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.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 23, 9:57 PM CDT	River Flood Watch	LOT	Iroquois	38 hr
Oct 23, 9:57 PM CDT	River Flood Watch	LOT	LaSalle	4 days
Oct 23, 9:57 PM CDT	River Flood Watch	LOT	Livingston	3 days
Oct 24, 3:10 AM CDT	Wind Advisory	LOT	Boone, Cook, DeKalb, DuPage, Ford, Grundy and 9 more	36 hr
Oct 24, 10:08 AM CDT	River Flood Warning	LOT	Cook	53 hr
Oct 24, 11:28 AM CDT	River Flood Watch	LOT	Grundy, LaSalle	71 hr
Oct 24, 11:28 AM CDT	River Flood Watch	LOT	Bureau, LaSalle, Putnam	6 days
Oct 24, 11:28 AM CDT	River Flood Watch	LOT	LaSalle	3 days
Oct 24, 6:08 PM CDT	Special Weather Statement	LOT	Ford, Livingston	52 min
Oct 24, 6:43 PM CDT	Special Weather Statement	LOT	Iroquois	77 min

Nearby

River Flood Watches in Illinois, 2021 River Flood Watches in Indiana, 2021 Every river flood watch 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.