Alert archive / Indiana / Flash Flood Warnings in 2010

Flash Flood Warning 16, NWS Chicago, IL

June 22, 2010Iroquois County, Illinois; Benton County, Jasper County, Newton County, Indiana

NWS Chicago, IL issued this flash flood warning at Jun 22, 2010, 4:52 AM CDT for Iroquois County, Illinois; Benton County, Jasper County, Newton County, Indiana. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 22, 2010, 4:52 AM CDT (09:52 UTC)
Expired: Jun 22, 2010, 10:45 AM CDT
In force: 6 hr
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Flood severity: None

Counties Iroquois County, IL, Benton County, IN, Jasper County, IN, Newton County, IN

The radar

The Chicago radar (KLOT), 103 km from the middle of the area, began a volume at 09:52 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 nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 9.9 hours before the alert went out and 126 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 4509 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 931 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 194 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 10.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash 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 flash flood warning went out at Jun 22, 4:15 AM CDT, 37 minutes earlier.

Area forecast discussion, Jun 22, 4:15 AM CDT, 37 minutes before

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Hazardous weather outlook, Jun 21, 4:56 PM CDT, 11 hours 56 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
456 PM CDT MON JUN 21 2010

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
222200-
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-
456 PM CDT MON JUN 21 2010 /556 PM EDT MON JUN 21 2010/

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

.DAY ONE...TONIGHT.

  WEATHER HAZARDS EXPECTED:

  SCATTERED THUNDERSTORMS...SOME COULD PRODUCE:
    DAMAGING WINDS IN EXCESS OF 70 MPH.
    HAIL TO THE SIZE OF GOLFBALLS.
    VERY HEAVY RAINFALL WITH LOCALIZED FLOODING.
    FREQUENT CLOUD TO GROUND LIGHTNING.
    POSSIBLY A TORNADO.

  AREAS AFFECTED AND TIMING:

  SCATTERED THUNDERSTORMS WILL DEVELOP EARLY THIS EVENING AND
  COULD LINGER INTO THE EARLY PORTIONS OF THE OVERNIGHT
  HOURS...WITH THE GREATEST POTENTIAL FOR SEVERE WEATHER SOUTH OF
  A VALPARAISO TO JOLIET TO OREGON LINE.

  DISCUSSION:

  THE ATMOSPHERE IS QUICKLY DESTABILIZING AND WINDS ALOFT ARE
  INCREASING IN ADVANCE OF AN APPROACHING UPPER LEVEL
  DISTURBANCE...SETTING THE STAGE FOR THE DEVELOPING THUNDERSTORMS
  TO QUICKLY BECOME SEVERE. GIVEN THE VERY STRONG INSTABILITY AND
  INCREASING WINDS ALOFT THE POTENTIAL EXISTS FOR THE MOST INTENSE
  STORMS TO PRODUCE DAMAGING WINDS...LARGE HAIL AND POSSIBLY A
  TORNADO.

  THE THREAT OF SEVERE THUNDERSTORMS SHOULD GRADUALLY DIMINISH
  LATER THIS EVENING INTO THE OVERNIGHT HOURS. GIVEN THE VERY
  MOIST AIRMASS IN PLACE THE POTENTIAL WILL EXIST FOR LOCALLY
  HEAVY RAINFALL...WHICH COULD RESULT IN LOCALIZED FLASH FLOODING.

  FINALLY...PORTIONS OF THE UPPER ILLINOIS RIVER AND SUGAR CREEK
  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 OVER THE WEEKEND.

  THERE IS ALSO A CHANCE OF THUNDERSTORMS BY SATURDAY NIGHT INTO
  SUNDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS WILL BE NEEDED THIS EVENING.

&&

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

LMZ740>745-222200-
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-
456 PM 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...TONIGHT.

THERE IS A CHANCE OF THUNDERSTORMS.

.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.

THERE IS ANOTHER CHANCE OF THUNDERSTORMS SATURDAY NIGHT INTO
SUNDAY.

&&

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-
870-872-874-876-878-222200-
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-
456 PM CDT MON JUN 21 2010

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

.DAY ONE...TONIGHT.

THERE IS A CHANCE OF THUNDERSTORMS.

.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

IZZI

In the hours before

Local storm report, Jun 22, 12:00 AM CDT, 4 hours 52 minutes before

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Local storm report, Jun 22, 12:15 AM CDT, 4 hours 37 minutes before

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Local storm report, Jun 22, 12:29 AM CDT, 4 hours 23 minutes before

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Local storm report, Jun 22, 12:45 AM CDT, 4 hours 7 minutes before

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Local storm report, Jun 22, 2:11 AM CDT, 2 hours 41 minutes before

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Local storm report, Jun 22, 2:14 AM CDT, 2 hours 38 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
Jun 21, 7:18 PM CDT	Severe Thunderstorm Warning	LOT	Iroquois	57 min
Jun 21, 7:45 PM CDT	Special Weather Statement	LOT	Ogle	45 min
Jun 21, 7:47 PM CDT	Flash Flood Warning	LOT	Ford, Iroquois	6 hr
Jun 21, 7:59 PM CDT	Severe Thunderstorm Warning	LOT	Ogle, Winnebago	31 min
Jun 21, 8:34 PM CDT	Severe Thunderstorm Warning	LOT	Boone, Ogle, Winnebago	56 min
Jun 21, 8:51 PM CDT	Severe Thunderstorm Warning	LOT	Ford, Grundy, Kankakee, LaSalle, Livingston, Will	54 min
Jun 21, 9:17 PM CDT	Tornado Warning	LOT	Ford, Iroquois, Livingston	43 min
Jun 21, 9:25 PM CDT	River Flood Advisory	LOT	Grundy, Will	4 days
Jun 21, 9:34 PM CDT	Severe Thunderstorm Warning	LOT	Boone, McHenry	56 min
Jun 21, 9:50 PM CDT	Severe Thunderstorm Warning	LOT	Cook, Grundy, Kendall, Will	32 min
Jun 21, 9:53 PM CDT	Special Marine Warning	LOT		112 min
Jun 21, 9:54 PM CDT	Severe Thunderstorm Warning	LOT	Ford, Iroquois	66 min
Jun 21, 10:06 PM CDT	Special Marine Warning	LOT		114 min
Jun 21, 10:10 PM CDT	Severe Thunderstorm Warning	LOT	Iroquois, Kankakee	65 min
Jun 21, 10:15 PM CDT	River Flood Advisory	LOT	Grundy	55 hr
Jun 21, 10:15 PM CDT	River Flood Advisory	LOT	LaSalle	55 hr
Jun 21, 10:22 PM CDT	Tornado Warning	LOT	Lake, McHenry	38 min
Jun 21, 10:52 PM CDT	Severe Thunderstorm Warning	LOT	Lake	24 min
Jun 21, 10:58 PM CDT	Severe Thunderstorm Warning	LOT	Cook, Lake	47 min
Jun 21, 11:05 PM CDT	Special Marine Warning	LOT		70 min
Jun 22, 12:00 AM CDT	Severe Thunderstorm Warning	LOT	Ford, Iroquois	45 min
Jun 22, 12:35 AM CDT	Severe Thunderstorm Warning	LOT	Iroquois	40 min
Jun 22, 1:49 AM CDT	Areal Flood Advisory	LOT	Ford, Iroquois	3 hr
Jun 22, 2:57 PM CDT	River Flood Advisory	LOT	Iroquois, Kankakee	3 days
Jun 21, 8:46 PM CDT	River Flood Warning	LOT	Lake, Newton	13 hr
Jun 22, 10:50 AM CDT	Flash Flood Warning	LOT	Benton	3 hr
Jun 22, 1:43 PM CDT	Areal Flood Warning	LOT	Benton	17 hr

Nearby

Flash Flood Warnings in Indiana, 2010 Flash Flood Warnings in Illinois, 2010 Every flash 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.