Alert archive / Illinois / River Flood Warnings in 2020

River Flood Warning 83, NWS Chicago, IL

May 17, 2020Cook County, Illinois

NWS Chicago, IL issued this river flood warning at May 17, 2020, 5:43 AM CDT for Cook County, Illinois. It took effect at May 17, 2020, 9:34 PM CDT. It was in force for 3 days.

The area

The counties it named.

The facts

Issued: May 17, 2020, 5:43 AM CDT (10:43 UTC)
In effect from: May 17, 2020, 9:34 PM CDT
Expired: May 21, 2020, 1:30 AM CDT
In force: 3 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 10:42 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 at River Forest (RVFI2). The gauge peaked at 17.49 ft at May 18, 2020, 12:00 PM CDT.

Action stage: 13 ft
Minor stage: 16 ft
Moderate stage: 17.5 ft
Major stage: 18.5 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05530750, 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 17, 4:08 AM CDT, 1 hour 35 minutes earlier.

Area forecast discussion, May 17, 4:08 AM CDT, 1 hour 35 minutes before

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Hazardous weather outlook, May 17, 5:19 AM CDT, 24 minutes before

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<head>
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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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      <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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The office that day

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

Issued	Product	Office	Counties	Lasted
May 16, 7:21 PM CDT	River Flood Watch	LOT		45 hr
May 16, 7:26 PM CDT	River Flood Advisory	LOT	DeKalb	48 hr
May 16, 7:48 PM CDT	River Flood Advisory	LOT	Cook	68 hr
May 16, 7:51 PM CDT	River Flood Advisory	LOT	Iroquois	17 hr
May 16, 7:52 PM CDT	River Flood Warning	LOT	LaSalle	5 days
May 16, 8:00 PM CDT	River Flood Watch	LOT	Grundy	17 hr
May 16, 8:09 PM CDT	River Flood Warning	LOT	Lake	7 days
May 16, 8:20 PM CDT	River Flood Warning	LOT	Cook	6 days
May 16, 9:16 PM CDT	Small Craft Advisory	LOT		3 days
May 17, 12:42 PM CDT	River Flood Warning	LOT	Iroquois	5 days
May 17, 12:44 PM CDT	River Flood Warning	LOT	Boone	4 days
May 17, 12:44 PM CDT	River Flood Warning	LOT	Ogle	45 hr
May 17, 12:49 PM CDT	River Flood Warning	LOT	Grundy, Kankakee, Will	7 days
May 17, 1:12 PM CDT	River Flood Advisory	LOT	Winnebago	25 hr
May 17, 1:12 PM CDT	River Flood Advisory	LOT	Winnebago	33 hr
May 17, 1:15 PM CDT	River Flood Watch	LOT	Iroquois	6 days
May 17, 1:15 PM CDT	River Flood Watch	LOT	Iroquois, Kankakee	5 days
May 17, 1:48 PM CDT	Special Weather Statement	LOT	Livingston	27 min
May 17, 2:04 PM CDT	Areal Flood Advisory	LOT	Boone, DeKalb, Kane, Kendall, Lake, LaSalle and 3 more	6 hr
May 17, 2:14 PM CDT	Areal Flood Advisory	LOT	Cook, DuPage, Ford, Grundy, Iroquois, Kankakee and 4 more	3 hr
May 17, 2:54 PM CDT	Marine Dense Fog Advisory	LOT		52 hr
May 17, 3:29 PM CDT	Areal Flood Advisory	LOT	Cook, DuPage, Grundy, Kane, Kendall, Lake and 3 more	94 min
May 17, 4:32 PM CDT	Flash Flood Warning	LOT	Cook, DuPage, Ford, Grundy, Iroquois, Kane and 7 more	6 hr
May 17, 5:43 PM CDT	Areal Flood Advisory	LOT	Ford, Iroquois, Kankakee	3 hr
May 17, 6:48 PM CDT	Flash Flood Warning Considerable damage threat	LOT	Cook, DuPage, Kankakee, Lake, Will	3 hr
May 17, 6:59 PM CDT	Special Marine Warning	LOT		31 min
May 16, 7:32 PM CDT	River Flood Warning	LOT	Lake	65 hr
May 16, 8:07 PM CDT	River Flood Advisory	LOT	Newton	6 days
May 17, 1:07 PM CDT	River Flood Watch	LOT	Porter	21 days
May 17, 1:07 PM CDT	River Flood Watch	LOT	Jasper, Porter	21 days
May 17, 1:07 PM CDT	River Flood Watch	LOT	Jasper	4 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.