Alert archive / Illinois / Flash Flood Watches in 2020

Flash Flood Watch 2, NWS Chicago, IL

May 16, 202014 counties in Illinois; 5 counties in Indiana

NWS Chicago, IL issued this flash flood watch at May 16, 2020, 2:47 PM CDT for 14 counties in Illinois; 5 counties in Indiana. It took effect at May 17, 2020, 12:00 AM CDT. It was in force for 23 hr.

The area

The counties it named.

The facts

Issued: May 16, 2020, 2:47 PM CDT (19:47 UTC)
In effect from: May 17, 2020, 12:00 AM CDT
Expired: May 17, 2020, 10:43 PM CDT
In force: 23 hr
Issued by: NWS Chicago, IL
Flood severity: None

Counties Cook County, IL, DeKalb County, IL, DuPage County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Livingston County, IL, McHenry County, IL, Will County, IL, Benton County, IN, Jasper County, IN, Lake County, IN, Newton County, IN, Porter County, IN

The radar

The Chicago radar (KLOT), 23 km from the middle of the area, began a volume at 19:51 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.

What forecasters said that day

The local office's own words before this flash 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 flash flood watch went out at May 16, 1:01 PM CDT, 1 hour 46 minutes earlier.

Area forecast discussion, May 16, 1:01 PM CDT, 1 hour 46 minutes before

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Hazardous weather outlook, May 16, 11:34 AM CDT, 3 hours 13 minutes before

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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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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 15, 7:36 PM CDT	River Flood Advisory	LOT	Ogle	41 hr
May 16, 4:31 AM CDT	River Flood Warning	LOT	Will	4 days
May 16, 11:14 AM CDT	Marine Dense Fog Advisory	LOT		6 hr
May 16, 3:06 PM CDT	Lakeshore Flood Advisory	LOT	Cook, Lake	4 days

Nearby

Flash Flood Watches in Illinois, 2020 Flash Flood Watches in Indiana, 2020 Every flash flood watch 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.