Alert archive / Illinois / River Flood Warnings in 2011

River Flood Warning 64, NWS Chicago, IL

May 29, 2011Cook County, Illinois

NWS Chicago, IL issued this river flood warning at May 29, 2011, 4:21 PM CDT for Cook County, Illinois. It took effect at May 29, 2011, 8:15 PM CDT. It was in force for 25 hr.

The area

The counties it named.

The facts

Issued: May 29, 2011, 4:21 PM CDT (21:21 UTC)
In effect from: May 29, 2011, 8:15 PM CDT
Expired: May 30, 2011, 9:18 PM CDT
In force: 25 hr
Issued by: NWS Chicago, IL
Flood severity: Minor

County Cook County, IL

The radar

The Chicago radar (KLOT), 49 km from the middle of the area, began a volume at 21:21 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 Des Plaines (DSPI2).

Action stage: 13.5 ft
Minor stage: 15 ft
Moderate stage: 18 ft
Major stage: 19 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05529000, 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 May 29, 4:16 PM CDT, 5 minutes earlier.

Area forecast discussion, May 29, 4:16 PM CDT, 5 minutes before

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Hazardous weather outlook, May 29, 9:58 AM CDT, 6 hours 23 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
958 AM CDT SUN MAY 29 2011

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
301500-
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-
958 AM CDT SUN MAY 29 2011 /1058 AM EDT SUN MAY 29 2011/

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

.DAY ONE...TODAY AND TONIGHT.

  WEATHER HAZARDS EXPECTED:

  THUNDERSTORMS...THE STRONGEST MAY PRODUCE:

    DAMAGING WINDS IN EXCESS OF 70 MPH.
    HAIL TO THE SIZE OF HALF DOLLARS.
    FREQUENT CLOUD TO GROUND LIGHTNING.
    ISOLATED TORNADOES.
    LOCALLY HEAVY RAINFALL...WHICH COULD RESULT IN FLOODING.

  AREAS AFFECTED AND TIMING:

    NORTH CENTRAL ILLINOIS LATE MORNING THROUGH EARLY AFTERNOON.
    NORTHEAST ILLINOIS AND NORTHWEST INDIANA FROM MIDDAY THROUGH
    THIS AFTERNOON.

  DISCUSSION:

   ELEVATED MCS OVER EASTERN IOWA INTENSIFYING WITH SEVERE BOWING
   LINE SEGMENT APPROACHING THE MISSISSIPPI RIVER SOUTH OF
   MUSCATINE IOWA AT 945 AM CDT. THESE STORMS ARE EXPECTED TO MOVE
   EAST AND CONTINUE TO INTENSIFY AND INCREASE IN COVERAGE AS AIR
   MASS DESTABILIZES DOWNSTREAM ACROSS NORTHERN ILLINOIS ALONG
   RETREATING WARM FRONTAL BOUNDARY WHICH WILL LIFT NORTH ACROSS
   THE AREA. AS STORMS BECOME MORE SURFACE BASED...THREAT OF
   SEVERE WEATHER INCLUDING DAMAGING WINDS AND LARGE HAIL WILL
   LIKELY INCREASE. BACKED LOW LEVEL WINDS ALONG AND NORTH OF THE
   WARM FRONT WILL ALSO PRESENT SOME THREAT OF TORNADOES AS THE
   STORMS MOVE EAST INTO THIS AFTERNOON. VERY WARM AND MOIST
   THERMAL PROFILES ALSO SUGGEST THE POTENTIAL FOR HEAVY RAINFALL
   WITH THESE STORMS.

PORTIONS OF THE KANKAKEE AND ILLINOIS RIVERS WILL REMAIN IN
FLOOD...WITH ELEVATED STREAM FLOW ON MANY OTHER RIVERS AND
STREAMS. LOCALLY HEAVY RAINFALL TODAY AND TONIGHT WILL LIKELY LEAD
TO ADDITIONAL RISES ON AREA RIVERS AND STREAMS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

THE WARMEST WEATHER OF THE SPRING IS EXPECTED ON MONDAY WITH
TEMPERATURES CLIMBING INTO THE LOW 90S ACROSS MUCH OF THE AREA.
THE HEAT WILL BE ACCOMPANIED BY INCREASING HUMIDITY...LEADING TO
HEAT INDEX VALUES IN THE MIDDLE OR UPPER 90S.

THERE WILL BE PERIODIC CHANCES OF THUNDERSTORMS AGAIN BY THE
MIDDLE AND END OF THE WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS WILL LIKELY BE NEEDED TODAY.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

LMZ740>745-301500-
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-
958 AM CDT SUN MAY 29 2011

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.

THUNDERSTORMS...SOME POSSIBLY SEVERE PRODUCING STRONG WINDS IN
EXCESS OF 50 KT...ARE POSSIBLE FROM LATE THIS MORNING THROUGH
THIS AFTERNOON OR EARLY EVENING.

AREAS OF DENSE FOG MAY REDUCE VISIBILITY TO LESS THAN 1/2 MILE AT
TIMES TODAY.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

WINDS AND WAVES HAZARDOUS TO SMALL CRAFT ARE POSSIBLE LATE MONDAY
INTO TUESDAY.

THERE WILL BE PERIODIC CHANCES OF THUNDERSTORMS AGAIN BY THE
MIDDLE AND END OF THE WEEK.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-301500-
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-
958 AM CDT SUN MAY 29 2011

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

.DAY ONE...TODAY AND TONIGHT.

THUNDERSTORMS ARE POSSIBLE OVER MUCH OF THE LAKE TODAY. SOME
STORMS MAY BE SEVERE...PRODUCING WINDS IN EXCESS OF 50KT OVER THE
SOUTHERN PORTIONS OF THE LAKE THIS AFTERNOON AND EARLY THIS
EVENING. THERE WILL BE A CHANCE OF THUNDERSTORMS OVER THE
NORTHERN PORTIONS OF THE LAKE TONIGHT.

AREAS OF DENSE FOG MAY REDUCE VISIBILITY TO LESS THAN 1/2 MILE AT
TIMES.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

AREAS OF FOG MAY REDUCE VISIBILITY TO LESS THAN 1 MILE AT TIMES
ON
MONDAY OVER THE NORTHERN PORTIONS OF THE LAKE.

THERE WILL BE PERIODIC CHANCES OF THUNDERSTORMS AGAIN BY THE
MIDDLE AND END OF THE WEEK.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

RATZER

In the hours before

Local storm report, May 29, 3:49 PM CDT, 32 minutes before

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Local storm report, May 29, 3:52 PM CDT, 29 minutes before

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Local storm report, May 29, 3:57 PM CDT, 24 minutes before

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Local storm report, May 29, 4:01 PM CDT, 20 minutes before

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Local storm report, May 29, 4:08 PM CDT, 13 minutes before

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Local storm report, May 29, 4:15 PM CDT, 6 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
May 28, 7:42 PM CDT	Flash Flood Warning	LOT	Will	4 hr
May 28, 8:48 PM CDT	Marine Dense Fog Advisory	LOT		61 hr
May 29, 2:10 AM CDT	Dense Fog Advisory	LOT	Boone, DeKalb, DuPage, Kane, Lake, Lee and 3 more	7 hr
May 29, 10:34 AM CDT	Areal Flood Advisory	LOT	Boone, Cook, DeKalb, DuPage, Kane, Kendall and 7 more	6 hr
May 29, 11:13 AM CDT	Severe Thunderstorm Warning	LOT	DeKalb, LaSalle, Lee, Livingston	62 min
May 29, 11:19 AM CDT	Special Marine Warning	LOT		3 hr
May 29, 11:22 AM CDT	Special Marine Warning	LOT		3 hr
May 29, 11:23 AM CDT	Severe Thunderstorm Warning	LOT	Cook, DeKalb, DuPage, Kane, Kendall, Lake and 1 more	67 min
May 29, 11:31 AM CDT	Flash Flood Warning	LOT	DeKalb, LaSalle, Lee	6 hr
May 29, 11:51 AM CDT	Areal Flood Advisory	LOT	Cook, Ford, Grundy, Iroquois, Kankakee, Kendall and 3 more	4 hr
May 29, 11:58 AM CDT	Severe Thunderstorm Warning	LOT	DeKalb, DuPage, Ford, Grundy, Kane, Kankakee and 6 more	77 min
May 29, 12:32 PM CDT	Tornado Warning	LOT	Grundy, Kankakee, Livingston, Will	43 min
May 29, 12:38 PM CDT	Flash Flood Warning	LOT	Boone, Cook, DeKalb, DuPage, Kane, Lake and 4 more	5 hr
May 29, 12:43 PM CDT	Severe Thunderstorm Warning	LOT	Cook, DuPage, Ford, Grundy, Iroquois, Kane and 5 more	77 min
May 29, 1:16 PM CDT	Tornado Warning	LOT	Kankakee	44 min
May 29, 2:41 PM CDT	River Flood Advisory	LOT	DeKalb	34 hr
May 29, 3:44 PM CDT	River Flood Warning	LOT	Lake	42 hr
May 29, 3:44 PM CDT	River Flood Warning	LOT	Kane, Kendall	42 hr
May 29, 4:01 PM CDT	River Flood Advisory	LOT	Kankakee	39 hr
May 29, 4:01 PM CDT	River Flood Advisory	LOT	Grundy, Will	39 hr
May 29, 4:01 PM CDT	River Flood Advisory	LOT	Cook	4 hr
May 29, 4:01 PM CDT	River Flood Advisory	LOT	Iroquois	55 hr
May 29, 5:23 PM CDT	Areal Flood Warning	LOT	Cook, DeKalb, DuPage, Kane, Lake, Lee and 1 more	12 hr
May 29, 5:52 PM CDT	River Flood Advisory	LOT	Will	13 hr
May 29, 1:34 PM CDT	Severe Thunderstorm Warning	LOT	Benton, Jasper	41 min
May 29, 3:27 PM CDT	River Flood Warning	LOT	Lake	6 hr
May 29, 4:01 PM CDT	River Flood Advisory	LOT	Jasper	48 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.