Alert archive / Illinois / River Flood Warnings in 2017

River Flood Warning 37, NWS Chicago, IL

April 5, 2017Lake County, Illinois

NWS Chicago, IL issued this river flood warning at Apr 5, 2017, 9:52 AM CDT for Lake County, Illinois. It took effect at Apr 5, 2017, 7:00 PM CDT. It was in force for 68 hr.

The area

The counties it named.

The facts

Issued: Apr 5, 2017, 9:52 AM CDT (14:52 UTC)
In effect from: Apr 5, 2017, 7:00 PM CDT
Expired: Apr 8, 2017, 2:41 PM CDT
In force: 68 hr
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Flood severity: Minor

County Lake County, IL

The radar

The Chicago radar (KLOT), 85 km from the middle of the area, began a volume at 14:53 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 Des Plaines River at Lincolnshire (LDRI2). The gauge peaked at 13.16 ft at Apr 6, 2017, 5:00 PM CDT.

Action stage: 11.5 ft
Minor stage: 12.5 ft
Moderate stage: 14 ft
Major stage: 15.5 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05528100, 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 5, 6:40 AM CDT, 3 hours 12 minutes earlier.

Area forecast discussion, Apr 5, 6:40 AM CDT, 3 hours 12 minutes before

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Hazardous weather outlook, Apr 5, 4:30 AM CDT, 5 hours 22 minutes before

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
430 AM CDT Wed Apr 5 2017

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
060930-
Winnebago-Boone-McHenry-Lake Illinois-Ogle-Lee-De Kalb-Kane-
DuPage-Cook-La Salle-Kendall-Grundy-Will-Kankakee-Livingston-
Iroquois-Ford-Lake Indiana-Porter-Newton-Jasper-Benton-
430 AM CDT Wed Apr 5 2017 /530 AM EDT Wed Apr 5 2017/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...Today and Tonight.

WEATHER HAZARDS EXPECTED:
  Limited Thunderstorm Risk...with an associated:
      Limited Hail Risk...up to quarter size.
  Limited Flooding Risk.
  Elevated Non Thunderstorm Wind Risk.
  Limited Snow Risk.

DISCUSSION:

As a potent weather system moves over the area, wind gusts will
reach 40 to 50 mph tonight, with gusts to near 60 mph near the
lake shore late tonight. This will produce high waves near the
lake front, likely causing lakeshore flooding.

Rainfall on already wet ground may cause localized flooding, as
well as likely bring increases on area rivers which are already
running high.

A few thunderstorms may be seen mainly south of I-80. A few of
these could have some hail, mainly along and south of U.S.
Highway 24. More robust storms are expected to remain just south
of the area.

A mix with wet snow is likely tonight when some minor slushy
accumulation is possible. Very reduced visibility may be seen if
any small areas of moderate to heavy snow develop, most favored
along and east of Interstate 55 overnight.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thursday...
  Significant Non Thunderstorm Wind Risk.
  Limited Snow Risk.
  Limited Frost Risk.
Friday...
  Elevated Frost Risk.
Sunday and Monday...
  Limited Thunderstorm Risk.

DISCUSSION:

Wind gusts will of 40 to 50 mph will continue into the day
Thursday, with gusts to near or even over 60 mph near the lake
shore. High waves will continue near the lake front bringing
likely areas of lakeshore flooding.

Wet snow is likely on Thursday morning for mainly along and
east of Interstate 55. Brief greatly reduced visibility impacting
the morning commute is possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated today or tonight.

GENERAL STORM MOTION OF THE DAY:

Moving to the northeast at 45 mph.

&&

LMZ740>745-060930-
Winthrop Harbor to Wilmette Harbor-
Wilmette Harbor to Northerly Island-
Northerly Island to Calumet Harbor-Calumet Harbor to Gary-
Gary to Burns Harbor-Burns Harbor to Michigan City-
430 AM CDT Wed Apr 5 2017

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE illinois NEARSHORE
WATERS OF LAKE MICHIGAN AND THE indiana NEARSHORE WATERS OF LAKE
MICHIGAN.

.DAY ONE...Today and Tonight.

Storm Force Winds and Extremely Hazardous Waves are likely by
late tonight.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thursday...
  Storm Force Winds and Extremely Hazardous Waves are likely.
Friday...
  Gale Force Winds and Very Hazardous Waves are likely.
Saturday through Monday...
  Hazardous Conditions for Small Craft are likely.

Thunderstorms are possible Sunday night and Monday.

&&

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-060930-
Lake Michigan from Michigan City IN to St. Joseph MI 5 NM
offshore to Mid Lake-
Lake Michigan from Seul Choix Point to Rock Island Passage 5 NM
offshore to Mid Lake-
Lake Michigan South of a line from Seul Choix Point to the
Mackinac Bridge and north of a line from Charlevoix MI to South
Fox Island 5 NM offshore-
Lake Michigan from Charlevoix to Point Betsie MI 5 NM offshore to
Mid Lake-
Lake Michigan from Point Betsie to Manistee MI 5 NM offshore to
Mid Lake-
Lake Michigan from Rock Island Passage to Sturgeon Bay WI-
Lake Michigan from Sturgeon Bay to Two Rivers WI 5 NM offshore to
Mid Lake-
Lake Michigan from Two Rivers to Sheboygan WI 5 NM offshore to
Mid Lake-
Lake Michigan from Sheboygan to Port Washington WI 5 NM offshore
to Mid Lake-
Lake Michigan from Port Washington to North Point Light WI 5 NM
offshore to Mid Lake-
Lake Michigan from North Point Light to Wind Point WI 5 NM
offshore to Mid Lake-
Lake Michigan from Wind Point WI to Winthrop Harbor IL 5 NM
offshore to Mid Lake-
Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5 NM
offshore to Mid Lake-
Lake Michigan from Wilmette Harbor IL to Michigan City IN 5 NM
offshore to Mid Lake-
Lake Michigan from Pentwater to Manistee MI 5 NM offshore to Mid
Lake-
Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid
Lake-
Lake Michigan from Grand Haven to Whitehall MI 5 NM offshore to
Mid Lake-
Lake Michigan from Holland to Grand Haven MI 5 NM offshore to Mid
Lake-
Lake Michigan from South Haven to Holland MI 5 NM offshore to Mid
Lake-
Lake Michigan from St. Joseph to South Haven MI 5 NM offshore to
Mid Lake-
430 AM CDT Wed Apr 5 2017

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE
MICHIGAN.

.DAY ONE...Today and Tonight.

Gale force winds are likely this afternoon with storm force winds
developing late tonight across the southern half of the lake.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Gale force winds will continue through Friday, with storm force
winds across the southern half of the lake on Thursday.

Thunderstorms are possible on Monday.

&&

MTF

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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 4, 8:46 PM CDT	River Flood Advisory	LOT	Ogle	6 days
Apr 4, 9:32 PM CDT	River Flood Advisory	LOT	Cook	69 hr
Apr 4, 9:32 PM CDT	River Flood Advisory	LOT	Will	51 hr
Apr 4, 9:32 PM CDT	River Flood Advisory	LOT	Kane, McHenry	7 days
Apr 4, 9:41 PM CDT	River Flood Advisory	LOT	Grundy	4 days
Apr 5, 4:07 AM CDT	Lakeshore Flood Warning	LOT		45 hr
Apr 5, 9:09 AM CDT	River Flood Advisory	LOT	Winnebago	36 hr
Apr 5, 9:24 AM CDT	River Flood Advisory	LOT	Lee	36 hr
Apr 5, 9:40 AM CDT	River Flood Warning	LOT	Kankakee	63 hr
Apr 5, 9:52 AM CDT	River Flood Warning	LOT	Cook	3 days
Apr 5, 9:52 AM CDT	River Flood Warning	LOT	Kane, McHenry	5 days
Apr 5, 9:52 AM CDT	River Flood Warning	LOT	Kane, Kendall	3 days
Apr 5, 9:58 AM CDT	River Flood Warning	LOT	Iroquois	5 days
Apr 5, 9:58 AM CDT	River Flood Warning	LOT	Iroquois	71 hr
Apr 5, 10:08 AM CDT	River Flood Advisory	LOT	Grundy, Will	5 days
Apr 5, 10:08 AM CDT	River Flood Advisory	LOT	LaSalle	4 days
Apr 5, 11:48 AM CDT	River Flood Warning	LOT	LaSalle	5 days
Apr 5, 3:25 PM CDT	High Wind Warning	LOT		26 hr
Apr 5, 3:25 PM CDT	Wind Advisory	LOT	Lake	23 hr
Apr 5, 9:40 AM CDT	River Flood Warning	LOT	Porter	7 days
Apr 5, 9:40 AM CDT	River Flood Warning	LOT	Jasper, Porter	5 days
Apr 5, 10:08 AM CDT	River Flood Advisory	LOT	Jasper	69 hr
Apr 5, 10:08 AM CDT	River Flood Advisory	LOT	Newton	6 days

Nearby

River Flood Warnings in Illinois, 2017 Every river flood warning in 2017

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.