Alert archive / Illinois / River Flood Warnings in 2015

River Flood Warning 99, NWS Chicago, IL

December 21, 2015Bureau County, LaSalle County, Putnam County, Illinois

NWS Chicago, IL issued this river flood warning at Dec 21, 2015, 9:06 PM CST for Bureau County, LaSalle County, Putnam County, Illinois. It took effect at Dec 22, 2015, 9:00 PM CST. It was in force for 26 days.

The area

The counties it named.

The facts

Issued: Dec 21, 2015, 9:06 PM CST (03:06 UTC)
In effect from: Dec 22, 2015, 9:00 PM CST
Expired: Jan 17, 2016, 10:21 AM CST
In force: 26 days
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Flood severity: Minor

Counties Bureau County, IL, LaSalle County, IL, Putnam County, IL

The radar

The Chicago radar (KLOT), 101 km from the middle of the area, began a volume at 03:04 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 near La Salle (LSLI2).

Action stage: 19 ft
Minor stage: 20 ft
Moderate stage: 27 ft
Major stage: 31 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 411925089063901, 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 Dec 21, 6:38 PM CST, 2 hours 28 minutes earlier.

Area forecast discussion, Dec 21, 6:38 PM CST, 2 hours 28 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
Dec 21, 8:45 PM CST	River Flood Advisory	LOT	LaSalle	5 days
Dec 21, 8:49 PM CST	River Flood Advisory	LOT	Ogle	7 days
Dec 21, 9:10 PM CST	River Flood Advisory	LOT	LaSalle	6 days
Dec 22, 9:35 AM CST	River Flood Watch	LOT	Lake	49 hr
Dec 22, 9:35 AM CST	River Flood Watch	LOT	Lake	5 days
Dec 22, 9:35 AM CST	River Flood Watch	LOT	Kane, McHenry	35 hr
Dec 22, 9:35 AM CST	River Flood Watch	LOT	Kane, Kendall	4 days
Dec 22, 9:35 AM CST	River Flood Watch	LOT	LaSalle	3 days
Dec 22, 9:43 AM CST	River Flood Advisory	LOT	Winnebago	7 days
Dec 22, 9:43 AM CST	River Flood Advisory	LOT	Lee	6 days
Dec 22, 3:07 PM CST	Gale Watch	LOT		13 hr
Dec 22, 3:07 PM CST	Small Craft Advisory	LOT		27 hr

Nearby

River Flood Warnings in Illinois, 2015 Every river flood warning in 2015

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.