Alert archive / Illinois / River Flood Warnings in 2010

River Flood Warning 49, NWS Chicago, IL

June 21, 2010Iroquois County, Illinois

NWS Chicago, IL issued this river flood warning at Jun 21, 2010, 9:24 AM CDT for Iroquois County, Illinois. It took effect at Jun 22, 2010, 6:54 AM CDT. It was in force for 3 days.

The area

The counties it named.

The facts

Issued
Jun 21, 2010, 9:24 AM CDT (14:24 UTC)
In effect from
Jun 22, 2010, 6:54 AM CDT
Expired
Jun 25, 2010, 8:33 AM CDT
In force
3 days
Issued by
NWS Chicago, IL
Flood severity
Minor

County Iroquois County, IL

The radar

The Chicago radar (KLOT), 98 km from the middle of the area, began a volume at 14:26 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 Sugar Creek (E-IL) at Milford (MILI2). The gauge peaked at 22.92 ft at Jun 23, 2010, 1:00 AM CDT.

actionminormoderate152006/2106/2206/2306/2406/2506/26
Action stage
15 ft
Minor stage
18 ft
Moderate stage
22 ft
Major stage
26 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05525500, 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 Jun 21, 9:24 AM CDT, 0 minutes earlier.

Area forecast discussion, Jun 21, 9:24 AM CDT, 0 minutes before
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Hazardous weather outlook, Jun 21, 4:42 AM CDT, 4 hours 42 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
442 AM CDT MON JUN 21 2010

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
220945-
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-
442 AM CDT MON JUN 21 2010 /542 AM EDT MON JUN 21 2010/

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

.DAY ONE...TODAY AND TONIGHT.

  WEATHER HAZARDS EXPECTED:

  THUNDERSTORMS...SOME MAY BE SEVERE CAPABLE OF PRODUCING:
    DAMAGING WIND GUSTS OVER 60 MPH.
    HAIL TO THE SIZE OF NICKELS.
    VERY HEAVY DOWNPOURS WHICH COULD LEAD TO FLASH FLOODING.
    FREQUENT CLOUD TO GROUND LIGHTNING.

  AREAS AFFECTED AND TIMING:

  WHILE ISOLATED THUNDERSTORMS WILL BE POSSIBLE ACROSS MUCH OF
  NORTHERN ILLINOIS AND NORTHWEST INDIANA THIS MORNING...AREAS
  SOUTH OF A PONTIAC TO RENSSELAER LINE WILL BE MOST LIKELY TO SEE
  THUNDERSTORMS THIS MORNING. THE CHANCE OF THUNDERSTORMS WILL
  THEN INCREASE AGAIN ACROSS THE ENTIRE OUTLOOK AREA BY EARLY
  AFTERNOON. THE POTENTIAL FOR SEVERE THUNDERSTORMS WILL BE
  HIGHEST FROM MID AFTERNOON INTO THE EARLY EVENING HOURS. SEVERE
  THUNDERSTORMS WILL BE POSSIBLE ACROSS THE ENTIRE AREA THIS
  AFTERNOON AND THIS EVENING...BUT THE GREATEST THREAT WILL LIKELY
  BE ALONG AND SOUTH OF THE INTERSTATE 80 CORRIDOR.

  DISCUSSION:

  ONE THUNDERSTORM COMPLEX WILL MOVE ACROSS CENTRAL ILLINOIS AND
  INTO CENTRAL INDIANA THIS MORNING. ISOLATED TO SCATTERED
  THUNDERSTORMS WILL BE POSSIBLE NORTH OF THIS LARGER
  COMPLEX...ESPECIALLY ACROSS PORTIONS OF THE OUTLOOK AREA SOUTH
  OF A PONTIAC TO RENSSELAER LINE.

  THUNDERSTORMS ARE THEN EXPECTED TO DIMINISH FOR A TIME LATE THIS
  MORNING THROUGH MIDDAY...BEFORE ANOTHER COMPLEX OF STORMS
  APPROACHES THE AREA THIS AFTERNOON. DEPENDING UPON THE AMOUNT OF
  CLOUD COVER BY EARLY AFTERNOON...THE AIR MASS MAY BECOME
  SUFFICIENTLY UNSTABLE TO PROMOTE THE DEVELOPMENT OF SEVERE
  THUNDERSTORMS DURING THE AFTERNOON AND EARLY EVENING HOURS.
  WHILE THUNDERSTORMS WILL BE POSSIBLE ACROSS THE ENTIRE
  AREA...THE GREATEST THREAT OF SEVERE WEATHER IS EXPECTED TO
  AGAIN BE ACROSS SOUTHERN PORTIONS OF THE OUTLOOK AREA...MAINLY
  ALONG AND SOUTH OF THE INTERSTATE 80 CORRIDOR.

  IN ADDITION...THE ATMOSPHERE WILL BE VERY MOIST...SO THE THREAT
  OF HEAVY RAINFALL AND LOCALIZED FLASH FLOODING WILL EXIST.

  FINALLY...PORTIONS OF THE UPPER ILLINOIS RIVER WILL REMAIN IN
  FLOOD.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

  THE AREA WILL CONTINUE TO SEE PERIODIC THUNDERSTORMS TUESDAY
  THROUGH WEDNESDAY NIGHT. WE WILL REMAIN IN A PATTERN THAT IS
  CONDUCIVE FOR SOME OF THESE THUNDERSTORMS TO BE SEVERE WITH
  DAMAGING WINDS THE PRIMARY THREAT.

  THE THUNDERSTORMS WILL ALSO PRODUCE LOCALLY VERY HEAVY RAINFALL
  TOTALS...WITH THE THREAT OF FLASH FLOODING INCREASING WITH EACH
  SUCCESSIVE ROUND OF THUNDERSTORMS. GIVEN THE POTENTIAL FOR
  REPEATED BOUTS OF HEAVY RAINFALL...THE THREAT DOES EXIST FOR
  SIGNIFICANT FLOODING PROBLEMS TO DEVELOP THIS WEEK.

  PORTIONS OF THE UPPER ILLINOIS RIVER WILL REMAIN IN FLOOD
  THROUGH THE UPCOMING WORK WEEK.

  HEAT INDICES OVER 100 DEGREES ARE POSSIBLE SATURDAY.

  THERE IS ALSO A CHANCE OF THUNDERSTORMS BY SATURDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON INTO THIS EVENING.
SPOTTERS MAY ALSO BE NEEDED ON OCCASION TUESDAY THROUGH WEDNESDAY
NIGHT.

&&

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

LMZ740>745-220945-
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-
442 AM CDT MON JUN 21 2010

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.

THERE IS A CHANCE OF THUNDERSTORMS TODAY AND TONIGHT...WITH WIND
GUSTS OVER 35 KNOTS POSSIBLE. THUNDERSTORMS ARE LIKELY TONIGHT AND
MAY BE SEVERE WITH WIND GUSTS IN EXCESS OF 50 KNOTS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

PERIODIC CHANCES OF THUNDERSTORMS WILL CONTINUE TUESDAY THROUGH
WEDNESDAY NIGHT. SOME OF THE STORMS MAY BE SEVERE WITH WIND GUSTS
OVER 50 KNOTS THE PRIMARY HAZARD.

&&

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-
870-872-874-876-878-220945-
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 TOW 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-
442 AM CDT MON JUN 21 2010

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

.DAY ONE...TODAY AND TONIGHT.

THERE IS A CHANCE OF THUNDERSTORMS TODAY ON THE FAR SOUTH PORTION
OF THE LAKE. THERE IS A CHANCE OF THUNDERSTORMS ACROSS NORTHERN
LAKE MICHIGAN TONIGHT...WHILE THUNDERSTORMS WILL BE LIKELY TONIGHT
ACROSS THE SOUTH PART OF THE LAKE. SOME OF THE STORMS ACROSS
SOUTHERN LAKE MICHIGAN COULD BE SEVERE TONIGHT...WITH DAMAGING
WIND GUSTS IN EXCESS OF 50 KNOTS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THERE WILL BE PERIODIC CHANCES OF THUNDERSTORMS TUESDAY THROUGH
WEDNESDAY NIGHT. SOME OF THE STORMS MAY BE SEVERE ACROSS SOUTHERN
LAKE MICHIGAN...WITH WIND GUSTS OVER 50 KNOTS THE PRIMARY HAZARD.

THERE IS ALSO A CHANCE OF THUNDERSTORMS OVER MAINLY NORTHERN
PORTIONS OF THE LAKE BY FRIDAY NIGHT INTO SATURDAY...SPREADING TO
SOUTHERN PORTIONS OF THE LAKE SATURDAY.

&&

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

RATZER

In the hours before

Special weather statement, Jun 21, 6:26 AM CDT, 2 hours 58 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
626 AM CDT MON JUN 21 2010

ILZ010-019-021-023-032-033-039-211230-
FORD IL-GRUNDY IL-IROQUOIS IL-KANKAKEE IL-LA SALLE IL-LEE IL-
LIVINGSTON IL-
626 AM CDT MON JUN 21 2010

...STRONG THUNDERSTORMS WILL AFFECT FORD...GRUNDY...IROQUOIS...LA
SALLE...LIVINGSTON...SOUTHERN KANKAKEE AND SOUTHERN LEE COUNTIES...

AT 624 AM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE FROM PRINCETON
TO LACON TO 13 MILES EAST OF EUREKA TO 23 MILES SOUTHWEST OF GIBSON
CITY...MOVING NORTHEAST AT 40 MPH. ADDITIONAL STORMS WERE DEVELOPING
FROM NEAR FAIRBURY TO NEAR MILFORD ACROSS SOUTHERN LIVINGSTON...FORD
AND IROQUOIS COUNTIES.

WIND GUSTS TO 50 MPH AND HAIL UP TO PENNY SIZE ARE POSSIBLE WITH THE
STRONGEST OF THESE STORMS. VERY HEAVY RAIN WILL FALL FROM THESE
STORMS...AND MAY CAUSE WATER TO POND ON ROADS AND QUICKLY FILL
ROADSIDE DITCHES AND SMALL STREAMS.

THESE STORMS WILL BE NEAR SUBLETTE...TONICA...RUTLAND...AND PERU
AROUND 645 AM...PAW PAW...COMPTON...WEST BROOKLYN...AND TROY GROVE
AROUND 700 AM...SAUNEMIN AND ROBERTS AROUND 715 AM.

LAT...LON 4061 8847 4062 8858 4075 8859 4075 8893
      4092 8894 4093 8906 4110 8907 4111 8917
      4158 8918 4159 8964 4161 8964 4177 8895
      4163 8894 4164 8862 4146 8860 4146 8840
      4117 8826 4111 8753 4049 8754 4040 8846

RATZER
Local storm report, Jun 21, 7:52 AM CDT, 1 hour 32 minutes before
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Local storm report, Jun 21, 8:11 AM CDT, 1 hour 13 minutes before
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Local storm report, Jun 21, 8:13 AM CDT, 1 hour 11 minutes before
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Local storm report, Jun 21, 8:25 AM CDT, 59 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 6:26 AM CDTSpecial Weather StatementLOTFord, Grundy, Iroquois, LaSalle, Livingston64 min
Jun 21, 6:48 AM CDTSevere Thunderstorm WarningLOTGrundy, LaSalle, Livingston42 min
Jun 21, 7:04 AM CDTSevere Thunderstorm WarningLOTFord, Grundy, Iroquois, Kankakee, Kendall, LaSalle and 2 more41 min
Jun 21, 7:13 AM CDTAreal Flood AdvisoryLOTFord, Iroquois, Livingston4 hr
Jun 21, 7:35 AM CDTFlash Flood WarningLOTFord, Iroquois, Livingston6 hr
Jun 21, 5:00 PM CDTTornado WarningLOTFord, Iroquois30 min
Jun 21, 5:29 PM CDTTornado WarningLOTIroquois61 min
Jun 21, 6:19 PM CDTSpecial Weather StatementLOTFord26 min
Jun 21, 6:27 PM CDTTornado WarningLOTIroquois33 min
Jun 21, 6:41 PM CDTAreal Flood AdvisoryLOTIroquois6 hr
Jun 21, 6:50 PM CDTTornado WarningLOTFord, Livingston55 min
Jun 21, 7:57 AM CDTFlash Flood WarningLOTBenton6 hr

Nearby

River Flood Warnings in Illinois, 2010Every river flood warning in 2010

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.