Alert archive / Illinois / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 88, NWS Chicago, IL

June 8, 2011Kendall County, Illinois

NWS Chicago, IL issued this severe thunderstorm warning at Jun 8, 2011, 11:43 PM CDT for Kendall County, Illinois. It was in force for 47 min. 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 8, 2011, 11:43 PM CDT (04:43 UTC)
Expired: Jun 9, 2011, 12:30 AM CDT
In force: 47 min
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Kendall County, IL

The radar

The Chicago radar (KLOT), 29 km from the middle of the area, began a volume at 04:45 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, 4.7 hours before the alert went out and 161 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: 1634 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 2146 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 107 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jun 8, 11:11 PM CDT, 32 minutes earlier.

Area forecast discussion, Jun 8, 11:11 PM CDT, 32 minutes before

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Hazardous weather outlook, Jun 8, 3:49 PM CDT, 7 hours 54 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
349 PM CDT WED JUN 8 2011

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
092100-
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-
349 PM CDT WED JUN 8 2011 /449 PM EDT WED JUN 8 2011/

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

.DAY ONE...TONIGHT.

  WEATHER HAZARDS EXPECTED:

 THUNDERSTORMS...THE STRONGEST OF WHICH MAY PRODUCE:

  DAMAGING WIND GUSTS IN EXCESS OF 60 MPH.
  QUARTER SIZE HAIL.
  FREQUENT CLOUD TO GROUND LIGHTNING.
  LOCALLY HEAVY RAINFALL IN EXCESS OF AN INCH.

 AREAS AFFECTED AND TIMING:

  THUNDERSTORMS WILL BE POSSIBLE ACROSS NORTHWEST AND NORTH
  CENTRAL ILLINOIS EARLY THIS EVENING. THUNDERSTORMS WILL LIKELY
  SPREAD SOUTHEAST ACROSS THE REMAINDER OF THE OUTLOOK AREA LATER
  THIS EVENING AND OVERNIGHT.

 DISCUSSION:

  A COLD FRONT STRETCHING FROM WISCONSIN SOUTHWEST INTO KANSAS
  THIS AFTERNOON WILL BE THE FOCAL POINT FOR THUNDERSTORM
  DEVELOPMENT LATE THIS AFTERNOON INTO EARLY EVENING. THE AIRMASS
  AHEAD OF THE FRONTAL BOUNDARY IS VERY UNSTABLE AND THUNDERSTORMS
  ARE EXPECTED TO INITIATE ACROSS PORTIONS OF SOUTHERN WISCONSIN
  AND NORTHEASTERN IOWA LATE THIS AFTERNOON AS A MID LEVEL
  DISTURBANCE MOVES ACROSS THE REGION. THESE THUNDERSTORMS WILL
  LIKELY CONTINUE TO MOVE SOUTHEAST INTO NORTHWEST AND NORTH CENTRAL
  ILLINOIS THIS EVENING WITH A WIND AND HAIL THREAT ACROSS THESE
  AREAS. AS THE FRONT CONTINUES TO SAG SOUTH...THUNDERSTORMS WILL
  BECOME ORGANIZED INTO A LINE AND TRAINING OF THESE THUNDERSTORMS
  WILL POTENTIALLY BRING MULTIPLE ROUNDS OF HEAVY RAIN TO SOME
  AREAS. LOCALIZED FLASH FLOODING...MAINLY IN URBANIZED OR POOR
  DRAINAGE AREAS WILL BE A CONCERN OVERNIGHT.

PORTIONS OF THE KANKAKEE RIVER WILL REMAIN IN FLOOD. PORTIONS OF
THE ILLINOIS RIVER WILL REMAIN NEAR BANKFULL.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

PERIODIC CHANCES OF THUNDERSTORMS WILL CONTINUE THURSDAY INTO
EARLY SATURDAY. SOME OF THESE THUNDERSTORMS COULD BE SEVERE WITH
DAMAGING WINDS AND LARGE HAIL THURSDAY AFTERNOON...MAINLY SOUTH
OF INTERSTATE 80. THERE IS ALSO A CHANCE OF SEVERE THUNDERSTORMS
FRIDAY AFTERNOON AND EVENING...MAINLY ACROSS THE ILLINOIS PORTION
OF THE OUTLOOK AREA. LOCALLY HEAVY RAINFALL MAY BE POSSIBLE WITH
STORMS LATE FRIDAY.

THERE IS A CHANCE OF THUNDERSTORMS AGAIN MONDAY AND TUESDAY.

PORTIONS OF THE KANKAKEE RIVER WILL REMAIN IN FLOOD. PORTIONS OF
THE ILLINOIS RIVER WILL REMAIN NEAR BANKFULL. OTHER RIVERS
MAY SEE RISES IF HEAVY RAINFALL MATERIALIZES ACROSS PORTIONS OF
THE OUTLOOK AREA THROUGH FRIDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS MAY BE NEEDED THIS EVENING AND TONIGHT.

&&

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

LMZ740>745-092100-
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-
349 PM CDT WED JUN 8 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE
WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE
MICHIGAN.

.DAY ONE...TONIGHT.

GUSTY SOUTHWEST WINDS WILL RESULT IN HAZARDOUS CONDITIONS FOR
SMALL CRAFT THROUGH THIS EVENING.

THUNDERSTORMS ARE LIKELY BY THIS EVENING. SOME STORMS COULD BE
SEVERE DURING THE EVENING HOURS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

HAZARDOUS WAVE CONDITIONS FOR SMALL CRAFT ARE POSSIBLE THURSDAY
AND FRIDAY.

THERE WILL BE ADDITIONAL PERIODIC CHANCES OF THUNDERSTORMS
THURSDAY THROUGH EARLY SATURDAY...AND AGAIN MONDAY AND TUESDAY.

&&

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-
870-872-874-876-878-092100-
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-
349 PM CDT WED JUN 8 2011

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

.DAY ONE...TONIGHT.

THUNDERSTORMS ARE LIKELY ACROSS THE LAKE THIS EVENING AND TONIGHT.
SOME STORMS MAY BE SEVERE THIS AFTERNOON AND THIS EVENING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

THERE IS A CHANCE OF THUNDERSTORMS ON SOUTHERN LAKE MICHIGAN
THURSDAY...AND ON MUCH OF THE LAKE FRIDAY INTO EARLY SATURDAY.
THERE WILL BE ANOTHER CHANCE OF THUNDERSTORMS ON SOUTHERN AND
CENTRAL LAKE MICHIGAN MONDAY AND TUESDAY.

&&

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

BMD

In the hours before

Local storm report, Jun 8, 10:47 PM CDT, 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1047 PM CDT WED JUN 08 2011

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

1042 PM     TSTM WND DMG     MACHESNEY PARK          42.36N 89.04W
06/08/2011                   WINNEBAGO          IL   TRAINED SPOTTER

            6 IN DIA TREE SNAPPED. 7800 BLOCK OF HILDRED RD.

&&

CM

Local storm report, Jun 8, 10:49 PM CDT, 54 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1049 PM CDT WED JUN 08 2011

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

1040 PM     HAIL             2 S WOODSTOCK           42.28N 88.44W
06/08/2011  E0.50 INCH       MCHENRY            IL   TRAINED SPOTTER

&&

CM

Local storm report, Jun 8, 10:50 PM CDT, 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1050 PM CDT WED JUN 08 2011

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

1015 PM     HAIL             BELVIDERE               42.25N 88.85W
06/08/2011  E0.50 INCH       BOONE              IL   TRAINED SPOTTER

            APPLETON RD AND EAST STATE ST.

&&

CM

Local storm report, Jun 8, 11:09 PM CDT, 34 minutes before

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Local storm report, Jun 8, 11:25 PM CDT, 18 minutes before

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Local storm report, Jun 8, 11:41 PM CDT, 2 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 8, 8:46 PM CDT	Special Weather Statement	LOT	Boone, McHenry	29 min
Jun 8, 9:10 PM CDT	Severe Thunderstorm Warning	LOT	Boone, McHenry, Winnebago	65 min
Jun 8, 9:12 PM CDT	Special Marine Warning	LOT		2 hr
Jun 8, 9:27 PM CDT	Severe Thunderstorm Warning	LOT	Lake, McHenry	50 min
Jun 8, 9:47 PM CDT	Severe Thunderstorm Warning	LOT	LaSalle, Lee, Ogle, Winnebago	58 min
Jun 8, 9:55 PM CDT	Special Marine Warning	LOT		95 min
Jun 8, 10:14 PM CDT	Severe Thunderstorm Warning	LOT	Boone, McHenry, Winnebago	61 min
Jun 8, 10:20 PM CDT	Severe Thunderstorm Warning	LOT	Boone, DeKalb, Kane, McHenry	55 min
Jun 8, 10:30 PM CDT	Areal Flood Advisory	LOT	Boone, Lake, McHenry, Winnebago	6 hr
Jun 8, 10:44 PM CDT	Severe Thunderstorm Warning	LOT	LaSalle, Lee, Ogle, Winnebago	61 min
Jun 8, 11:01 PM CDT	Severe Thunderstorm Warning	LOT	Cook, DuPage, Lake	59 min
Jun 8, 11:15 PM CDT	Special Marine Warning	LOT		60 min
Jun 8, 11:30 PM CDT	Special Marine Warning	LOT		60 min
Jun 8, 11:55 PM CDT	Areal Flood Advisory	LOT	Boone, Cook, DeKalb, DuPage, Kane, Kendall and 7 more	6 hr
Jun 9, 1:44 AM CDT	Special Weather Statement	LOT	McHenry	46 min
Jun 9, 2:02 AM CDT	Special Weather Statement	LOT	Winnebago	43 min
Jun 9, 2:30 AM CDT	Special Weather Statement	LOT	Lee	30 min
Jun 9, 2:33 AM CDT	Severe Thunderstorm Warning	LOT	Cook, DuPage, Kendall, Will	57 min
Jun 9, 2:37 AM CDT	Special Marine Warning	LOT		83 min
Jun 9, 3:13 AM CDT	Severe Thunderstorm Warning	LOT	Cook	37 min
Jun 9, 3:20 AM CDT	Severe Thunderstorm Warning	LOT	Lee	55 min
Jun 9, 4:04 AM CDT	Severe Thunderstorm Warning	LOT	DeKalb, LaSalle	56 min
Jun 9, 4:05 AM CDT	Small Craft Advisory	LOT		29 hr
Jun 9, 4:17 AM CDT	Severe Thunderstorm Warning	LOT	DeKalb, Lee, Ogle	45 min
Jun 9, 5:33 AM CDT	Flash Flood Warning	LOT	Cook, DeKalb, DuPage, Grundy, Kane, Kendall and 4 more	6 hr
Jun 9, 6:00 AM CDT	Severe Thunderstorm Warning	LOT	DeKalb, LaSalle, Lee	60 min
Jun 9, 6:40 AM CDT	Areal Flood Advisory	LOT	Cook, DuPage	5 hr
Jun 9, 7:53 AM CDT	Special Weather Statement	LOT	Grundy, Livingston, Will	37 min
Jun 9, 10:28 AM CDT	River Flood Warning	LOT	Cook	43 hr
Jun 9, 10:35 AM CDT	River Flood Warning	LOT	Bureau, LaSalle	9 days
Jun 9, 10:41 AM CDT	River Flood Advisory	LOT	LaSalle	5 hr
Jun 9, 11:11 AM CDT	River Flood Warning	LOT	Will	34 hr
Jun 9, 11:11 AM CDT	River Flood Warning	LOT	Will	43 hr
Jun 9, 11:26 AM CDT	Flash Flood Warning	LOT	Cook, DeKalb, DuPage, Grundy, Kane, Kankakee and 5 more	6 hr
Jun 9, 2:14 PM CDT	River Flood Advisory	LOT	Cook	32 hr
Jun 9, 2:59 PM CDT	River Flood Advisory	LOT	DeKalb	18 hr
Jun 9, 3:08 PM CDT	River Flood Warning	LOT	LaSalle	42 hr
Jun 9, 3:18 PM CDT	River Flood Advisory	LOT	Kane, Kendall	42 hr
Jun 9, 3:18 PM CDT	River Flood Advisory	LOT	Kankakee	7 hr
Jun 9, 3:18 PM CDT	River Flood Advisory	LOT	Cook	31 hr
Jun 9, 3:24 PM CDT	Flash Flood Watch	LOT	Boone, DeKalb, DuPage, Grundy, Kane, Kankakee and 7 more	17 hr
Jun 9, 3:54 PM CDT	River Flood Warning	LOT	Grundy	43 hr
Jun 9, 3:54 PM CDT	River Flood Warning	LOT	LaSalle	61 hr
Jun 9, 5:00 PM CDT	Severe Thunderstorm Warning	LOT	Ford, Iroquois, Livingston	60 min
Jun 9, 5:09 PM CDT	Tornado Warning	LOT	Ford, Iroquois	39 min
Jun 9, 5:52 PM CDT	Areal Flood Warning	LOT	Cook, DeKalb, DuPage, Kane, Kendall, LaSalle and 2 more	24 hr
Jun 9, 9:21 AM CDT	Flash Flood Warning	LOT	Jasper, Lake, Porter	2 hr
Jun 9, 9:56 AM CDT	Rip Current Statement	LOT	Lake, Porter	18 hr
Jun 9, 10:28 AM CDT	River Flood Warning	LOT	Lake	46 hr
Jun 9, 2:14 PM CDT	River Flood Advisory	LOT	Lake	9 hr

Nearby

Severe Thunderstorm Warnings in Illinois, 2011 Every severe thunderstorm 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.