Alert archive / Illinois / River Flood Warnings in 2011

River Flood Warning 24, NWS Chicago, IL

April 22, 2011LaSalle County, Illinois

NWS Chicago, IL issued this river flood warning at Apr 22, 2011, 10:30 PM CDT for LaSalle County, Illinois. It took effect at Apr 23, 2011, 4:54 AM CDT. It was in force for 48 hr.

The area

The counties it named.

The facts

Issued: Apr 22, 2011, 10:30 PM CDT (03:30 UTC)
In effect from: Apr 23, 2011, 4:54 AM CDT
Expired: Apr 25, 2011, 4:43 AM CDT
In force: 48 hr
Issued by: NWS Chicago, IL
Flood severity: Minor

County LaSalle County, IL

The radar

The Chicago radar (KLOT), 73 km from the middle of the area, began a volume at 03:31 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 Illinois River at Ottawa (OTWI2).

Action stage: 461 ft
Minor stage: 463 ft
Moderate stage: 467 ft
Major stage: 471 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record, 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 Apr 22, 5:17 PM CDT, 5 hours 13 minutes earlier.

Area forecast discussion, Apr 22, 5:17 PM CDT, 5 hours 13 minutes before

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Hazardous weather outlook, Apr 22, 4:41 PM CDT, 5 hours 49 minutes before

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In the hours before

Local storm report, Apr 22, 5:59 PM CDT, 4 hours 31 minutes before

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Local storm report, Apr 22, 6:11 PM CDT, 4 hours 19 minutes before

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Special weather statement, Apr 22, 6:18 PM CDT, 4 hours 12 minutes before

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Local storm report, Apr 22, 6:23 PM CDT, 4 hours 7 minutes before

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Local storm report, Apr 22, 6:29 PM CDT, 4 hours 1 minute before

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Local storm report, Apr 22, 6:46 PM CDT, 3 hours 44 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 8:56 PM CDT	Special Weather Statement	LOT	Grundy, LaSalle	64 min
Apr 22, 9:23 PM CDT	River Flood Advisory	LOT	Lake	50 hr
Apr 22, 9:23 PM CDT	River Flood Advisory	LOT	Grundy, Will	10 days
Apr 22, 9:23 PM CDT	River Flood Advisory	LOT	Will	20 hr
Apr 22, 9:23 PM CDT	River Flood Advisory	LOT	LaSalle	24 hr
Apr 22, 9:23 PM CDT	River Flood Advisory	LOT	Iroquois	13 hr
Apr 22, 9:23 PM CDT	River Flood Advisory	LOT	Iroquois	13 hr
Apr 22, 9:23 PM CDT	River Flood Advisory	LOT	LaSalle	13 hr
Apr 22, 9:54 PM CDT	Special Weather Statement	LOT	Ford	66 min
Apr 22, 10:30 PM CDT	River Flood Warning	LOT	Grundy	14 hr
Apr 23, 3:26 AM CDT	Small Craft Advisory	LOT		16 hr
Apr 23, 10:24 AM CDT	River Flood Warning	LOT	Iroquois	11 days
Apr 23, 10:24 AM CDT	River Flood Warning	LOT	Iroquois	19 hr
Apr 23, 10:24 AM CDT	River Flood Warning	LOT	LaSalle	23 hr
Apr 23, 11:18 AM CDT	River Flood Advisory	LOT	Grundy	11 hr
Apr 23, 12:22 PM CDT	River Flood Warning	LOT	Lake	10 hr
Apr 23, 12:24 PM CDT	River Flood Advisory	LOT	Grundy	72 hr
Apr 22, 9:23 PM CDT	River Flood Advisory	LOT	Jasper	37 hr
Apr 22, 10:55 PM CDT	Special Weather Statement	LOT	Benton	65 min
Apr 22, 11:01 PM CDT	Special Weather Statement	LOT	Jasper	29 min
Apr 23, 11:18 AM CDT	River Flood Advisory	LOT	Porter	46 hr
Apr 23, 11:18 AM CDT	River Flood Advisory	LOT	Jasper, Porter	46 hr

Nearby

River Flood Warnings in Illinois, 2011 Every river flood warning in 2011

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.