Alert archive / Illinois / River Flood Warnings in 2017

River Flood Warning 48, NWS Chicago, IL

April 10, 2017Lake County, Illinois

NWS Chicago, IL issued this river flood warning at Apr 10, 2017, 9:30 PM CDT for Lake County, Illinois. It was in force for 4 days.

The area

The counties it named.

The facts

Issued: Apr 10, 2017, 9:30 PM CDT (02:30 UTC)
Expired: Apr 14, 2017, 1:00 PM CDT
In force: 4 days
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 02:31 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 Des Plaines River near Russell (RUSI2).

Action stage: 6.5 ft
Minor stage: 7 ft
Moderate stage: 9 ft
Major stage: 10 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05527800, 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 10, 2:59 PM CDT, 6 hours 31 minutes earlier.

Area forecast discussion, Apr 10, 2:59 PM CDT, 6 hours 31 minutes before

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Hazardous weather outlook, Apr 10, 2:56 PM CDT, 6 hours 34 minutes before

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
256 PM CDT Mon Apr 10 2017

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
112000-
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-
256 PM CDT Mon Apr 10 2017 /356 PM EDT Mon Apr 10 2017/

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

.DAY ONE...Tonight.

WEATHER HAZARDS EXPECTED:
  Significant Thunderstorm Risk...with an associated:
      Limited Tornado Risk.
      Elevated Hail Risk...up to 2 inches size.
      Elevated Thunderstorm Wind Damage Risk...up to 65 MPH.
  Limited Non Thunderstorm Wind Risk.

DISCUSSION:

Additional strong to severe thunderstorms will continue
across portions of northern Illinois through the afternoon. These storms
will develop in a significantly more unstable environment and will pose a
more substantial severe threat with time including large hail of up to 2
inches in diameter and damaging wind gusts to 65 mph. While there is a chance
of a tornado or two, the threat is on the lower side.
These storms will move east across the Chicago and Kankakee areas
through the afternoon, and into northwest Indiana by
very late afternoon or early evening. The storms may develop into a fast
moving cluster. Storms should exit the area to the east after 8 or 9 pm CDT.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Friday through Sunday...
  Limited Thunderstorm Risk.

.SPOTTER INFORMATION STATEMENT...

Spotters will likely be needed this afternoon and early evening.

GENERAL STORM MOTION OF THE DAY:

Moving to the northeast at 45 mph.

&&

LMZ740>745-112000-
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-
256 PM CDT Mon Apr 10 2017

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

.DAY ONE...Tonight.

Hazardous Conditions for Small Craft are likely.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday through Thursday...
  No Hazards.

Friday and Saturday...
  Hazardous Conditions for Small Craft are likely.

&&

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-112000-
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-
256 PM CDT Mon Apr 10 2017

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

.DAY ONE...Tonight.

Thunderstorms are likely through this evening.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

There is a chance of thunderstorms Friday night through early
Sunday.

&&

KMD

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In the hours before

Local storm report, Apr 10, 5:34 PM CDT, 3 hours 56 minutes before

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Local storm report, Apr 10, 5:51 PM CDT, 3 hours 39 minutes before

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Local storm report, Apr 10, 5:52 PM CDT, 3 hours 38 minutes before

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Special weather statement, Apr 10, 5:54 PM CDT, 3 hours 36 minutes before

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Special weather statement, Apr 10, 6:01 PM CDT, 3 hours 29 minutes before

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Local storm report, Apr 10, 6:04 PM CDT, 3 hours 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
604 PM CDT MON APR 10 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0556 PM     HAIL             ARLINGTON HEIGHTS       42.09N 87.98W
04/10/2017  E0.75 INCH       COOK               IL   PUBLIC

&&

C

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 9:36 PM CDT	River Flood Advisory	LOT	Lake	42 hr
Apr 10, 9:36 PM CDT	River Flood Advisory	LOT	Cook	57 hr
Apr 10, 9:36 PM CDT	River Flood Advisory	LOT	Kane, McHenry	4 days
Apr 10, 9:36 PM CDT	River Flood Advisory	LOT	Kane, Kendall	14 days
Apr 11, 3:21 AM CDT	Marine Dense Fog Advisory	LOT		3 hr
Apr 11, 3:42 AM CDT	Dense Fog Advisory	LOT	DuPage, Grundy, Kane, Kendall	3 hr
Apr 10, 8:22 PM CDT	Special Weather Statement	LOT	Newton	38 min
Apr 10, 8:27 PM CDT	Severe Thunderstorm Warning	LOT	Lake, Porter	37 min

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.