Alert archive / Illinois / Tornado Warnings in 2010

Tornado Warning 22, NWS Chicago, IL

June 23, 2010Cook County, DuPage County, Will County, Illinois

NWS Chicago, IL issued this tornado warning at Jun 23, 2010, 6:03 PM CDT for Cook County, DuPage County, Will County, Illinois. It was in force for 57 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 23, 2010, 6:03 PM CDT (23:03 UTC)
Expired
Jun 23, 2010, 7:00 PM CDT
In force
57 min
Issued by
NWS Chicago, IL
Area
Storm-based polygon

Counties Cook County, IL, DuPage County, IL, Will County, IL

The radar

The Chicago radar (KLOT), 21 km from the middle of the area, began a volume at 23:06 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 23, 2:10 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.1 hours before the alert went out and 185 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-pSkew-T log-p diagram, Lincoln, IL at 12:00Z on 2010-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1735 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2010-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 121 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1735 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
1302 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
121 m²/s²
0-3 km storm-relative helicity
115 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at Jun 23, 5:06 PM CDT, 57 minutes earlier.

Area forecast discussion, Jun 23, 5:06 PM CDT, 57 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
506 PM CDT WED JUN 23 2010

.MESOSCALE DISCUSSION...
420 PM CDT

VISIBLE SATELLITE IMAGERY INDICATING THE CAP THAT HAD DEVELOPED
EARLIER IS RAPIDLY WEAKENING OR BEING OVERCOME BY THE WARMTH AT THE
SFC...NOTED IN THE INCREASING CUMULUS FIELD ACROSS NORTHERN IL. LLVL
FLOW HAS STRENGTHENED WITH MANY LOCATIONS AT 21Z INDICATING GUSTY
SFC WINDS BETWEEN 18-25KTS. MUCH OF THE REGION REMAINS VERY MOIST
WITH DEW PTS IN THE LOW/MID 70S ACROSS CENTRAL IL/IN. DEEP LAYER
MOISTURE FLUX CONVERGENCE IS NOTED FROM THE STORM PREDICTION CENTER
MESOANALYSIS PAGE ALONG THE BOUNDARY...WHICH IS CURRENTLY LOCATED
ACROSS CENTRAL KANSAS STRETCHING NORTHEAST THROUGH SOUTHERN
WISCONSIN.

THE FOCUS FOR THE AFTERNOON CONVECTION DEVELOPMENT REMAINS WITH
DAMAGING WINDS...HOWEVER WITH LCL HEIGHTS BELOW 2KFT AGL AND
PROXIMITY OF NUMEROUS LLVL BOUNDARIES...HELICITY AND ROTATING
UPDRAFTS OR ISOLATED TORNADOES ARE STILL POSSIBLE. THE 0-6KM BULK
SHEAR VALUES REMAIN PEGGED BTWN 40-50KTS FROM LATEST RUC
ANALYSIS...WITH A FEW POCKETS OF 50-60KTS. 850MB WINDS FROM 20Z
CYCLE OF THE RUC CONTINUE TO INDICATE NEARLY 50KTS OF UNIDIRECTIONAL
WIND FROM SW TO NE. CONVECTION HAS BEGUN TO REALIZE THE DIMINISHING
CAP AND ABUNDANT ENERGY IN THE BOUNDARY LAYER...COUPLED WITH THE
DEEP LAYER SHEAR AND IMPRESSIVE WIND FIELDS BLO 500MB...THE CONCERN
IS ALSO FOR THE DEVELOPMENT OF FAST MOVING LINE OF CONVECTION OR
BOWS. IN ADDITION IT CAN/T BE RULED OUT FOR THE POTENTIAL OF A
DERECHO. DESPITE THE DEEP LAYER SHEAR AND POTENTIAL THAT UPDRAFTS
COULD BECOME SHEARED...THERE IS ALSO A THREAT FOR LARGE HAIL OF
GOLFBALLS OR LARGER.

THE FLOODING THREAT REMAINS VERY HIGH AS WELL WITH VERY MOIST OR
SATURATED SOILS FROM FREQUENT ROUNDS OF CONVECTION OVER THE PAST
SEVERAL DAYS...INCLUDING EARLIER TODAY. FLASH FLOOD GUIDANCE REMAINS
VERY LOW OR IN SOME LOCATIONS LESS THAN ONE HALF INCH...THUS ANY
PRECIPITATION COULD SPAWN LOCALIZED FLOODING. PWAT VALUES REMAIN
ELEVATED IN THE 2 TO 3 STD DEV ABOVE NORMAL OR NEARLY 2.00 INCHES.
BRIEF HEAVY DOWNPOURS ARE POSSIBLE FROM THE LATE AFTERNOON
CONVECTION FOR PORTIONS OF NORTHERN IL.

&&

.DISCUSSION...
227 PM CDT

MAIN FORECAST CONCERN IS ON SEVERE POTENTIAL LATE THIS AFTERNOON
INTO THIS EVENING. PLEASE REFER TO THE ABOVE MESOSCALE DISCUSSION
FOR MORE INFORMATION ON THE SEVERE POTENTIAL THIS AFTERNOON INTO
TONIGHT. GENERALLY QUIET WEATHER EXPECTED FOR THURSDAY AND MOST
OF FRIDAY...WITH FOCUS THEN SHIFTING TO ADDITIONAL CHANCES OF
SHOWERS AND THUNDERSTORMS FOR THE WEEKEND.

SHOWERS AND THUNDERSTORMS WILL EXIT SOUTHEAST PORTIONS OF FORECAST
AREA LATE THIS EVENING. UPPER LEVEL SHORT WAVE RESPONSIBLE FOR
ENHANCING CONVECTION THIS EVENING WILL ALSO BE TRACKING INTO THE
OHIO RIVER VALLEY AND NORTHEAST UNITED STATES ON THURSDAY WITH
FAIRLY STRONG MID LEVEL SUBSIDENCE BECOMING ESTABLISHED ACROSS THE
AREA. BY FRIDAY NIGHT...LOW LEVEL RIDGE AXIS WILL BE SHIFTING EAST
OF THE AREA SETTING UP SOUTHWEST LOW LEVEL WARM ADVECTION ONCE
AGAIN AND A POTENTIAL OF ELEVATED CONVECTION MAINLY ACROSS
NORTHERN PORTIONS OF THE FORECAST AREA. NAM/GFS ARE IN GENERAL
AGREEMENT IN ANOTHER SHORT WAVE MOVING ACROSS THE NORTHERN GREAT
LAKES REGION THAT WILL ALLOW A WEST TO EAST BOUNDARY TO DROP
SOUTHWARD ACROSS THE GREAT LAKES REGION ON SATURDAY POSSIBLY
REACHING FAR SOUTHERN LAKE MICHIGAN BY SATURDAY NIGHT. VERY WARM
DAY IN STORE FOR SATURDAY AS FORECAST AREA REMAINS SOUTH OF THIS
BOUNDARY...AND 850 HPA TEMPS INCREASE INTO THE +20 TO +22 DEG
RANGE. HEAT INDICES LIKELY TO APPROACH 100 DEGREES ON SATURDAY DUE
TO THE COMBINATION OF DEW POINTS RISING BACK INTO THE LOWER 70S
AND HIGH TEMPERATURES FORECASTED IN THE LOWER TO MID 90S. A MORE
AMPLIFIED UPPER LEVEL TROUGH EXPECTED TO PROGRESS THROUGH
PROGRESSIVE NORTHERN TIER OF STATES FLOW PATTERN ON SUNDAY WITH
ANOTHER ASSOCIATED COLD FRONTAL PASSAGE EXPECTED ON SUNDAY.

CONDITIONS SHOULD DRY OUT ONCE AGAIN LATE SUNDAY AS THIS FRONT
MOVES THROUGH SETTING UP A FAIRLY QUIET BEGINNING TO NEXT WORK
WEEK. HAVE KEPT REMAINDER OF FORECAST DRY AT THIS TIME WITH RISING
UPPER HEIGHTS THROUGH THIS PERIOD AS AMPLIFIED UPPER RIDGE ACROSS
WESTERN CONUS SLOWLY SHIFTS EASTWARD. HAVE NOT MADE MANY CHANGES
TO DAY 6/7 PERIOD AT THIS TIME WITH DIMINISHING CONFIDENCE IN THE
HANDLING OF UPPER LOW DROPPING SOUTHWARD ACROSS EASTERN CANADA.
12Z ECMWF IS MORE AGGRESSIVE IN DROPPING THIS LOW SOUTHWARD INTO
EASTERN GREAT LAKES REGION BY MID WEEK. NOT MUCH CONFIDENCE IN
THIS ECMWF SOLUTION...AND HAVE SIDED WITH MORE OF A OPERATIONAL
GFS/NCEP ENSEMBLE MEAN IDEA OF A FURTHER NORTH POSITIONING OF THIS
UPPER LOW. GREATER POTENTIAL OF RETURN OF HUMID AND HOT CONDITIONS
EXPECTED FOR BEYOND DAY 7 PERIOD AS UPPER RIDGE SHOULD EVENTUALLY
SHIFT EASTWARD OVER GREAT LAKES REGION.

MARSILI

&&

.AVIATION...

//ORD AND MDW CONCERNS...UPDATED 22Z...

PRIMARY CONCERN REMAINS CONVECTION THROUGH EARLY/MID EVENING. CMS

//DISCUSSION...UPDATED 22Z...

CLUSTERS OF THUNDERSTORMS CONTINUE TO DEVELOP FROM NORTHWEST IL
SOUTHWEST INTO NORTHERN MISSOURI. NEW THUNDERSTORMS DEVELOPING
FURTHER EAST AND IMPACTING DPA/ORD. HAVE HIT THE TEMPOS HARDER
WITH GUSTS TO 45 KTS...POSSIBLY LOCALLY HIGHER. WILL WATCH TRENDS
AND AMEND AS NEEDED. BACK EDGE OF ACTIVITY SHOULD BE PASSING EAST
OF ORD/MDW BY 01Z OR SO. CMS

PREVIOUS DISCUSSION FROM 18Z...

ATMOSPHERE IN STATE OF FLUX ATTM AS COOL/STABLE BOUNDARY LAYER AIR
LEFT IN WAKE OF EARLIER CONVECTIVE COMPLEX IS IN THE PROCESS OF
RECOVERING. CURRENT VIS SATLT IMAGERY SHOWS RESIDUAL CONVECTIVE
DEBRIS DISSIPATING RAPIDLY AND SWLY LOW LVL FLOW INCRG IN RESPONSE
TO RAPID PRESSURE FALLS NOW OCCURRING FROM ERN IA-NWRN IL. THIS IS
ALLOWING QUICK RETURN OF DEEP TROPICAL AIR AHEAD OF APCHG COLD
FRONT. LATEST SPC MESO ANALYSES SHOW AIR OVER CNTRL/ERN IA...NRN
MO AND FAR W CNTRL IL DESTABILIZING RAPIDLY WITH SFC DEW POINTS
NEAR 80 DEG POOLING OVER SERN IA. IN ADDITION...WATER VAPOR IMAGERY
SUGGESTS SIGNIFICANT SUBSIDENCE AND DRYING IS OCCURRING BHD FRONT
FROM WRN MN-NW IA/ERN NEB. GUSTY NW WINDS IN THIS AREA SUPPORT
THIS AS WELL. THIS MEANS THAT IN ADDITION TO GROWING
INSTABILITY...ATMOSPHERE FROM UPR MS VALLEY THROUGH THE SRN GRTLKS
REGION IS BECOMING QUITE DYNAMIC.

TO SUMMARIZE ALL THIS...WX TO REMAIN QUIET THOUGH ABOUT 19Z...AS
AIR MASS CONTINUES TO RECOVER FROM EARLIER STORMS. BEGINNING
AROUND 20Z TS ARE EXPECTED TO ERUPT AHD OF ADVANCING COLD
FRONT...FROM NRN IL SWWD INTO MO. THESE STORMS SHOULD THEN RAPIDLY
BECOME SVR AFT 20Z...AND FORM INTO A SQLN FROM NR GYY-PNT-PIA BY
23Z.

STORMS TO ACCELERATE EWD OUT OF AREA ERLY THIS EVENING BHD BOWING
SQLN. BY 06Z...AREA TO BE OVERSPREAD BY MODEST NWLY WINDS AND ASSD
DRYING/STABILIZATION. THIS WILL BE THE BEGINNING OF AN EXTENDED
PERIOD OF VFR CONDITIONS WITH NIL WX.

MERZLOCK

//ORD AND MDW CONFIDENCE...UPDATED 22Z...

HIGH CONFIDENCE ON CONVECTION/TIMING THRU EARLY EVENING. CMS

//OUTLOOK FOR ORD/MDW FOR 06Z FRIDAY-12Z TUESDAY...UPDATED 18Z...

THURSDAY NIGHT...VFR.
FRIDAY...VFR.
SATURDAY...CHC TS...OTRW VFR.
SUNDAY...CHC TS...OTRW VFR.
MONDAY...VFR.
TUESDAY...VFR.

MERZLOCK

&&

.MARINE...
259 PM CDT

TROUGH OF LOW PRESSURE CURRENTLY STRETCHING FROM SOUTHERN QUEBEC
SOUTH THROUGH WISCONSIN...AND DOWN INTO NW MISSOURI...CONTINUES TO
SHIFT EAST. THIS TROUGH WILL MOVE THROUGH AND GRADUALLY BEYOND THE
LAKES LATER TONIGHT AND INTO TOMORROW. RAPID PRESSURE FALLS HAVE
KEPT WINDS UP AND AROUND SMALL CRAFT LEVELS FOR THE NEAR SHORE...AND
OCCASIONALLY GUSTING INTO THE 30 KT RANGE ACROSS THE SOUTHERN OPEN
LAKE. EXPECT THESE WINDS TO CONTINUE THROUGH THE EVENING HOURS
BEFORE VEERING AROUND TO THE NORTHWEST AS A COLD FRONT SWEEPS
THROUGH THE LAKE. OPTED TO KEEP THE SMALL CRAFT ADVISORY GOING THE
MORNING HOURS...AS A FAIR AMOUNT OF SUBSIDENCE SETTLES IN AND
THINK THE WINDS WILL REMAIN GUSTY THROUGH THE EARLY MORNING HOURS.
HIGH PRESSURE WILL THEN SETTLE IN ACROSS THE LAKES...REACHING THE
CENTRAL LAKES BY THURSDAY. AS HIGH PRESSURE SITS OVERHEAD...EXPECT
RELATIVELY LIGHT FLOW BEFORE THE HIGH SLIDES OFF TO THE EAST
FRIDAY AND SOUTHERLY WINDS ARRIVE BACK INTO THE AREA.

SHEA

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...FLASH FLOOD WATCH...ILZ003-ILZ004-ILZ005-ILZ006-ILZ008-ILZ010-
     ILZ011-ILZ012-ILZ013-ILZ014-ILZ019-ILZ020-ILZ021-ILZ022-
     ILZ023-ILZ032-ILZ033-ILZ039 UNTIL 1 AM THURSDAY.

IN...FLASH FLOOD WATCH...INZ001-INZ002-INZ010-INZ011-INZ019 UNTIL 1
     AM THURSDAY.

LM...SMALL CRAFT ADVISORY...NEARSHORE WATERS UNTIL 7 AM THURSDAY.

&&
Hazardous weather outlook, Jun 23, 4:45 PM CDT, 1 hour 18 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
445 PM CDT WED JUN 23 2010

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
242145-
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-
445 PM CDT WED JUN 23 2010 /545 PM EDT WED JUN 23 2010/

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

.DAY ONE...TONIGHT.

  WEATHER HAZARDS EXPECTED:

  THUNDERSTORMS...SOME COULD PRODUCE:

  DAMAGING WINDS IN EXCESS OF 80 MPH.
  HAIL TO THE SIZE OF GOLF BALLS.
  ISOLATED TORNADOES.
  HEAVY RAINFALL...WITH LOCALIZED FLASH FLOODING.

  AREAS AFFECTED AND TIMING:

  THUNDERSTORMS...SOME SEVERE...HAVE BEGUN TO MOVE INTO NORTH
  CENTRAL ILLINOIS LATE THIS AFTERNOON...AND ARE EXPECTED TO MOVE
  INTO THE CHICAGO METRO AREA SOUTHWEST TO LIVINGSTON AND LA SALLE
  COUNTY BETWEEN 5 PM AND 8 PM...THEN INTO NORTHWEST INDIANA AND
  EAST CENTRAL ILLINOIS INCLUDING IROQUOIS COUNTY BETWEEN 6 PM AND
  9 PM CDT.

  DISCUSSION:

  THE ATMOSPHERE CONTINUES TO DESTABILIZE AHEAD OF A COLD FRONT
  MOVING THROUGH THE REGION THIS EVENING. THUNDERSTORMS HAVE
  ALREADY DEVELOPED OVER PARTS OF IOWA AND ARE MOVING INTO NORTH
  CENTRAL ILLINOIS AT THIS HOUR. SEVERE WINDS...LARGE HAIL AND
  FUNNEL CLOUDS HAVE ALREADY BEEN REPORTED FROM THESE STORMS AS
  THEY MOVED ACROSS EASTERN IOWA...AND THE THREAT OF SEVERE
  WEATHER WILL PERSIST AS THEY CONTINUE TO MOVE ACROSS NORTHERN
  ILLINOIS AND NORTHWESTERN INDIANA.

  WINDS ALOFT ARE UNSEASONABLY STRONG...WHICH GIVEN THE
  INCREASINGLY UNSTABLE AIR MASS IS RESULTING IN AN EXTREMELY
  VOLATILE AND POTENTIALLY DANGEROUS SITUATION. INITIALLY THE
  THREAT WITH THE THUNDERSTORMS WILL BE VERY LARGE HAIL...LOCALLY
  DAMAGING WINDS...ALONG WITH SOME POTENTIAL FOR TORNADOES. AS
  THE STORMS MOVE EAST INTO EASTERN ILLINOIS AND NORTHWEST INDIANA
  IT APPEARS QUITE POSSIBLE THAT THEY WILL EVOLVE INTO A FAST
  MOVING LINE WITH THE POTENTIAL INCREASING FOR WIDESPREAD
  DAMAGING WINDS...SOME POSSIBLY QUITE SIGNIFICANT WITH GUSTS IN
  EXCESS OF 80 MPH.

  IN ADDITION TO SEVERE WEATHER...THE VERY WARM AND MOIST
  CONDITIONS WILL RESULT IN THESE STORMS PRODUCING LOCALLY HEAVY
  RAINFALL. THIS COULD LEAD TO FLOODING...AS THE GROUND REMAINS
  WET FROM REPEATED PERIODS OF HEAVY RAINFALL OVER THE PAST
  SEVERAL DAYS.

  HEAT INDEX VALUES MAY APPROACH 100 DEGREES LATE THIS AFTERNOON
  MAINLY SOUTH OF INTERSTATE 80.

  PORTIONS OF THE ILLINOIS RIVER...AND SUGAR CREEK...WILL REMAIN
  IN FLOOD.

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

  THERE IS A CHANCE OF THUNDERSTORMS SATURDAY THROUGH SUNDAY
  NIGHT.

  HOT AND HUMID WEATHER MAY PRODUCE HEAT INDEX VALUES NEAR 100
  DEGREES SATURDAY AND SUNDAY.

.SPOTTER INFORMATION STATEMENT...

  SPOTTERS WILL BE NEEDED LATER THIS AFTERNOON AND EVENING.

&&

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

LMZ740>745-242145-
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-
445 PM CDT WED JUN 23 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.

SEVERE THUNDERSTORMS ARE LIKELY LATE THIS AFTERNOON INTO THIS
EVENING. THESE STORMS MAY PRODUCE WINDS IN EXCESS OF 60 KNOTS AND
CLOUD TO WATER LIGHTNING.

HAZARDOUS WINDS FOR SMALL CRAFT ARE LIKELY THROUGH TONIGHT.

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

THERE IS A CHANCE OF THUNDERSTORMS SATURDAY THROUGH SUNDAY NIGHT.

&&

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-
870-872-874-876-878-242145-
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-
445 PM CDT WED JUN 23 2010

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

.DAY ONE...TONIGHT.

SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND THIS
EVENING. STORMS MAY PRODUCE WIND GUSTS IN EXCESS OF 50 KNOTS AND
CLOUD TO WATER LIGHTNING.

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

THERE IS A CHANCE OF THUNDERSTORMS FROM FRIDAY NIGHT THROUGH
SUNDAY NIGHT.

&&

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

BMD

In the hours before

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Local storm report, Jun 23, 5:52 PM CDT, 11 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 22, 9:01 PM CDTFlash Flood WatchLOTBoone, DeKalb, DuPage, Ford, Grundy, Iroquois and 10 more25 hr
Jun 22, 9:52 PM CDTRiver Flood AdvisoryLOTWinnebago59 hr
Jun 22, 9:52 PM CDTRiver Flood AdvisoryLOTWinnebago23 hr
Jun 22, 9:52 PM CDTRiver Flood AdvisoryLOTOgle23 hr
Jun 23, 3:52 AM CDTSmall Craft AdvisoryLOT27 hr
Jun 23, 5:29 AM CDTSevere Thunderstorm WarningLOTOgle, Winnebago61 min
Jun 23, 7:24 AM CDTSevere Thunderstorm WarningLOTDeKalb, LaSalle36 min
Jun 23, 8:42 AM CDTAreal Flood AdvisoryLOTBoone, Cook, DeKalb, DuPage, Grundy, Kane and 10 more5 hr
Jun 23, 8:58 AM CDTSevere Thunderstorm WarningLOTCook, Will32 min
Jun 23, 9:11 AM CDTSpecial Marine WarningLOT41 min
Jun 23, 4:19 PM CDTSevere Thunderstorm WarningLOTLee, Ogle41 min
Jun 23, 4:40 PM CDTTornado WarningLOTDeKalb, Lee50 min
Jun 23, 4:56 PM CDTSpecial Marine WarningLOT3 hr
Jun 23, 5:01 PM CDTSevere Thunderstorm WarningLOTDeKalb, Kane, Lee, Ogle44 min
Jun 23, 5:01 PM CDTSevere Thunderstorm WarningLOTCook, DuPage, Kane59 min
Jun 23, 5:12 PM CDTSevere Thunderstorm WarningLOTDeKalb, Kane, Kendall, LaSalle33 min
Jun 23, 5:24 PM CDTFlash Flood WarningLOTLee, Ogle2 hr
Jun 23, 5:29 PM CDTSevere Thunderstorm WarningLOTCook, DuPage, Grundy, Kane, Kendall, LaSalle and 1 more61 min
Jun 23, 5:39 PM CDTSevere Thunderstorm WarningLOTGrundy, LaSalle, Livingston66 min
Jun 23, 5:39 PM CDTTornado WarningLOTCook, DuPage66 min
Jun 23, 5:42 PM CDTFlash Flood WarningLOTCook, DeKalb, DuPage, Kane4 hr
Jun 23, 6:00 PM CDTSevere Thunderstorm WarningLOTDuPage30 min
Jun 23, 6:23 PM CDTSevere Thunderstorm WarningLOTCook, Kankakee, Will67 min
Jun 23, 6:24 PM CDTTornado WarningLOTCook25 min
Jun 23, 6:28 PM CDTSevere Thunderstorm WarningLOTFord, Grundy, Iroquois, Kankakee, Livingston, Will62 min
Jun 23, 6:33 PM CDTTornado WarningLOTFord, Grundy, Iroquois, Kankakee, Livingston27 min
Jun 23, 6:48 PM CDTSevere Thunderstorm WarningLOTGrundy, LaSalle, Livingston42 min
Jun 23, 9:06 AM CDTRiver Flood AdvisoryLOTNewton4 days
Jun 23, 6:48 PM CDTTornado WarningLOTLake, Porter22 min

Nearby

Tornado Warnings in Illinois, 2010Every tornado warning in 2010Tornadoes 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.