Alert archive / Illinois / River Flood Warnings in 2014

River Flood Warning 76, NWS Chicago, IL

August 23, 2014Grundy County, Illinois

NWS Chicago, IL issued this river flood warning at Aug 23, 2014, 9:27 AM CDT for Grundy County, Illinois. It took effect at Aug 23, 2014, 10:07 AM CDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Aug 23, 2014, 9:27 AM CDT (14:27 UTC)
In effect from: Aug 23, 2014, 10:07 AM CDT
Expired: Aug 23, 2014, 9:30 PM CDT
In force: 11 hr
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Flood severity: Minor

County Grundy County, IL

The radar

The Chicago radar (KLOT), 45 km from the middle of the area, began a volume at 14:27 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 Mazon River near Coal City (COLI2). The gauge peaked at 12.24 ft at Aug 23, 2014, 2:00 PM CDT.

Action stage: 10 ft
Minor stage: 12 ft
Moderate stage: 16 ft
Major stage: 19 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05542000, 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 Aug 23, 8:54 AM CDT, 33 minutes earlier.

Area forecast discussion, Aug 23, 8:54 AM CDT, 33 minutes before

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Hazardous weather outlook, Aug 23, 4:15 AM CDT, 5 hours 12 minutes before

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In the hours before

Special weather statement, Aug 23, 4:23 AM CDT, 5 hours 4 minutes before

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<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>
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        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
Aug 22, 8:14 PM CDT	River Flood Advisory	LOT	Cook	36 hr
Aug 23, 4:47 AM CDT	Dense Fog Advisory	LOT	Boone, Lake, McHenry, Winnebago	4 hr
Aug 23, 6:44 AM CDT	River Flood Advisory	LOT	Grundy	25 hr
Aug 23, 9:10 AM CDT	Marine Dense Fog Advisory	LOT		12 hr
Aug 23, 1:42 PM CDT	Areal Flood Advisory	LOT	Cook, Ford, Iroquois, Kankakee, Will	4 hr
Aug 23, 1:53 PM CDT	Areal Flood Advisory	LOT	Cook, Lake	4 hr
Aug 23, 2:07 PM CDT	Special Weather Statement	LOT	Cook, Lake	38 min
Aug 23, 2:22 PM CDT	Special Marine Warning	LOT		83 min
Aug 23, 3:38 PM CDT	Flash Flood Warning	LOT	Lake	6 hr
Aug 23, 4:28 PM CDT	River Flood Warning	LOT	Lake	9 hr

Nearby

River Flood Warnings in Illinois, 2014 Every river flood warning in 2014

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.