Alert archive / Illinois / River Flood Watches in 2021

River Flood Watch 11, NWS Quad Cities, IA

August 12, 2021Hancock County, McDonough County, Illinois

NWS Quad Cities, IA issued this river flood watch at Aug 12, 2021, 1:39 PM CDT for Hancock County, McDonough County, Illinois. It took effect at Aug 13, 2021, 6:12 PM CDT. It was in force for .

The area

The counties it named.

The facts

Issued: Aug 12, 2021, 1:39 PM CDT (18:39 UTC)
In effect from: Aug 13, 2021, 6:12 PM CDT
Expired: Aug 12, 2021, 9:59 PM CDT
In force
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Flood severity: None

Counties Hancock County, IL, McDonough County, IL

The radar

The Quad Cities radar (KDVN), 134 km from the middle of the area, began a volume at 18:42 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 La Moine River at Colmar (CLMI2).

Action stage: 19 ft
Minor stage: 20 ft
Moderate stage: 22 ft
Major stage: 24 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05584500, 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 Quad Cities, IA wrote its last area forecast discussion before this river flood watch went out at Aug 12, 12:17 PM CDT, 1 hour 22 minutes earlier.

Area forecast discussion, Aug 12, 12:17 PM CDT, 1 hour 22 minutes before

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Hazardous weather outlook, Aug 12, 3:23 AM CDT, 10 hours 16 minutes before

Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
323 AM CDT Thu Aug 12 2021

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-130830-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
323 AM CDT Thu Aug 12 2021

This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.

.DAY ONE...TODAY AND TONIGHT

A heat advisory is in effect for far northeast Missouri, parts of
far southeast Iowa and west central Illinois for this afternoon
into the early evening. Heat indices of 100 to 105 are expected.

There is a Slight Risk of severe thunderstorms south of a Sterling
Rock Falls to the Quad Cities to Fairfield Iowa line with a
Marginal Risk of severe storms to the south. The primary threat is
damaging winds and heavy rain.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Storm spotter activation may be needed this afternoon and
evening.

DC

In the hours before

Local storm report, Aug 12, 11:14 AM CDT, 2 hours 25 minutes before

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Special weather statement, Aug 12, 11:29 AM CDT, 2 hours 10 minutes before

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Local storm report, Aug 12, 11:36 AM CDT, 2 hours 3 minutes before

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Local storm report, Aug 12, 12:40 PM CDT, 59 minutes before

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Special weather statement, Aug 12, 12:55 PM CDT, 44 minutes before

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Local storm report, Aug 12, 1:06 PM CDT, 33 minutes before

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The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 12, 2:09 AM CDT	Special Weather Statement	DVN	Lee	21 min
Aug 12, 2:57 AM CDT	Heat Advisory	DVN	Lee	8 hr
Aug 12, 7:24 AM CDT	Special Weather Statement	DVN	Van Buren	36 min
Aug 12, 7:26 AM CDT	Severe Thunderstorm Warning	DVN	Van Buren	33 min
Aug 12, 9:10 AM CDT	Special Weather Statement	DVN	Van Buren	50 min
Aug 12, 9:23 AM CDT	Flash Flood Warning	DVN	Van Buren	4 hr
Aug 12, 9:54 AM CDT	Special Weather Statement	DVN	Lee, Van Buren	96 min
Aug 12, 10:32 AM CDT	Flash Flood Warning	DVN	Lee, Van Buren	6 hr
Aug 12, 11:29 AM CDT	Special Weather Statement	DVN	Lee, Van Buren	91 min
Aug 12, 12:44 PM CDT	Flash Flood Watch	DVN	Des Moines, Lee, Van Buren	8 hr
Aug 11, 8:34 PM CDT	Special Weather Statement	DVN	Bureau	26 min
Aug 12, 2:39 AM CDT	Special Weather Statement	DVN	Henderson	36 min
Aug 12, 2:43 AM CDT	Special Weather Statement	DVN	Putnam	32 min
Aug 12, 2:59 AM CDT	Special Weather Statement	DVN	Henderson, Warren	31 min
Aug 12, 11:10 AM CDT	Special Weather Statement	DVN	Putnam	35 min
Aug 12, 12:55 PM CDT	Special Weather Statement	DVN	Hancock, McDonough	95 min
Aug 12, 8:35 AM CDT	Special Weather Statement	DVN	Scotland	25 min
Aug 12, 2:29 PM CDT	Flash Flood Warning	DVN	Scotland	4 hr

Nearby

River Flood Watches in Illinois, 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.