Alert archive / Illinois / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 89, NWS Chicago, IL

June 9, 20114 counties in Illinois

NWS Chicago, IL issued this severe thunderstorm warning at Jun 9, 2011, 2:33 AM CDT for 4 counties in Illinois. It was in force for 57 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 9, 2011, 2:33 AM CDT (07:33 UTC)
Expired: Jun 9, 2011, 3:30 AM CDT
In force: 57 min
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Hail: 0.5 in
Wind: 60.0 mph

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

The radar

The Chicago radar (KLOT), 16 km from the middle of the area, began a volume at 07:34 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.

What was reported inside it

Time	Report	Where	Remark
Jun 9, 2:42 AM CDT	HAIL 0.25	Romeoville, IL
Jun 9, 3:00 AM CDT	TSTM WND DMG	Worth, IL	5 INCH DIA TREE FELL ON HOME WITH SMALLER BRANCHES DOWN ELSWHERE. 117TH ST AND RIDGELAND.
Jun 9, 3:00 AM CDT	TSTM WND GST 58	Evergreen Park, IL	SUSTAINED WINDS 48-50 MPH WITH PEAK GUST TO 58 MPH. PEA SIZED HAIL. 91ST AND CLIFTON PARK.
Jun 9, 3:10 AM CDT	TSTM WND GST 67	Burnham, IL

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 3 storm reports to this severe thunderstorm warning; the first came 27 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 7.6 hours before the alert went out and 179 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

The text

As transmitted, in the capitals the NWS used until 2016.

804 
WUUS53 KLOT 090733
SVRLOT
ILC031-043-093-197-090830-
/O.NEW.KLOT.SV.W.0089.110609T0733Z-110609T0830Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
233 AM CDT THU JUN 9 2011

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN COOK COUNTY IN NORTHEAST ILLINOIS...
  SOUTHERN DUPAGE COUNTY IN NORTHEAST ILLINOIS...
  EASTERN KENDALL COUNTY IN NORTHEAST ILLINOIS...
  NORTHERN WILL COUNTY IN NORTHEAST ILLINOIS...

* UNTIL 330 AM CDT

* AT 230 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR PLAINFIELD...AND MOVING
  EAST AT 50 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ROMEOVILLE AROUND 240 AM CDT.
  BOLINGBROOK...WOODRIDGE AND LOCKPORT AROUND 245 AM CDT.
  LEMONT...HOMER GLEN AND DARIEN AROUND 250 AM CDT.
  WILLOW SPRINGS...BURR RIDGE...ORLAND PARK AND INDIAN HEAD PARK
  AROUND 255 AM CDT.
  WORTH...CHICAGO RIDGE...PALOS HILLS AND HICKORY HILLS AROUND 300 AM
  CDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE
WILLOWBROOK...PALOS PARK...PALOS HEIGHTS...BRIDGEVIEW...HOMETOWN...
ROBBINS...CALUMET PARK...RIVERDALE AND SOUTH CHICAGO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4146 8753 4146 8849 4172 8840 4172 8826
      4176 8826 4188 8760 4184 8760 4173 8752
TIME...MOT...LOC 0733Z 263DEG 41KT 4165 8822
WIND...HAIL 60MPH <.50IN

$$

RATZER

3 follow-up statements

087 
WWUS53 KLOT 090749
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
249 AM CDT THU JUN 9 2011

ILC093-090756-
/O.CAN.KLOT.SV.W.0089.000000T0000Z-110609T0830Z/
KENDALL IL-
249 AM CDT THU JUN 9 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN KENDALL COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA...THOUGH THUNDERSTORMS WITH FREQUENT LIGHTNING AND LOCALLY 
HEAVY RAINFALL WILL CONTINUE ESPECIALLY ACROSS SOUTHERN KENDALL 
COUNTY. 

LAT...LON 4146 8753 4146 8825 4148 8825 4177 8819
      4188 8761 4184 8760 4173 8752
TIME...MOT...LOC 0746Z 265DEG 46KT 4164 8800

$$

ILC031-043-197-090830-
/O.CON.KLOT.SV.W.0089.000000T0000Z-110609T0830Z/
WILL IL-DUPAGE IL-COOK IL-
249 AM CDT THU JUN 9 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
COOK...SOUTHEASTERN DUPAGE AND NORTHERN WILL COUNTIES UNTIL 330 AM
CDT...

AT 243 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH. THIS STORM WAS LOCATED NEAR ROMEOVILLE...MOVING EAST AT 50
MPH. WINDS GUSTED TO 40 MPH AT THE NATIONAL WEATHER SERVICE OFFICE 
IN ROMEOVILLE WITH THIS STORM. 

THE SEVERE THUNDERSTORM WILL BE NEAR...
  ORLAND PARK...PALOS HILLS...HICKORY HILLS AND TINLEY PARK AROUND
  255 AM CDT.
  CRESTWOOD...ALSIP...MIDLOTHIAN AND WORTH AROUND 300 AM CDT.
  BLUE ISLAND...MERRIONETTE PARK...DIXMOOR AND POSEN AROUND 305 AM
  CDT.
  DOLTON...CALUMET CITY AND CHATHAM AROUND 310 AM CDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE ORLAND
HILLS...PALOS PARK...BRIDGEVIEW...PALOS HEIGHTS...HOMETOWN...CALUMET
PARK...ROBBINS...RIVERDALE...EAST HAZEL CREST AND SOUTH CHICAGO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4146 8753 4146 8825 4148 8825 4177 8819
      4188 8761 4184 8760 4173 8752
TIME...MOT...LOC 0746Z 265DEG 46KT 4164 8800
WIND...HAIL 60MPH <.50IN

$$

RATZER

971 
WWUS53 KLOT 090804
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
304 AM CDT THU JUN 9 2011

ILC031-043-197-090830-
/O.CON.KLOT.SV.W.0089.000000T0000Z-110609T0830Z/
WILL IL-DUPAGE IL-COOK IL-
304 AM CDT THU JUN 9 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
COOK...SOUTHEASTERN DUPAGE AND CENTRAL WILL COUNTIES UNTIL 330 AM
CDT...

AT 259 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THIS STORM WAS LOCATED NEAR CRESTWOOD...OR NEAR ALSIP...
MOVING EAST AT 55 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  DOLTON...CALUMET CITY...SOUTH HOLLAND AND CHATHAM AROUND 310 AM
  CDT.
  BURNHAM AROUND 315 AM CDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE SOUTH
CHICAGO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4146 8753 4146 8809 4161 8798 4181 8797
      4188 8761 4184 8760 4173 8752
TIME...MOT...LOC 0803Z 265DEG 46KT 4166 8771
WIND...HAIL 60MPH <.50IN

$$

BMD

205 
WWUS53 KLOT 090821
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
321 AM CDT THU JUN 9 2011

ILC031-043-197-090831-
/O.EXP.KLOT.SV.W.0089.000000T0000Z-110609T0830Z/
WILL IL-DUPAGE IL-COOK IL-
321 AM CDT THU JUN 9 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN COOK...
SOUTHEASTERN DUPAGE AND CENTRAL WILL COUNTIES WILL EXPIRE AT 330 AM
CDT...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA...THOUGH THUNDERSTORMS WITH FREQUENT LIGHTNING AND LOCALLY 
HEAVY RAINFALL WILL CONTINUE ESPECIALLY ACROSS WILL AND SOUTHERN 
COOK COUNTIES.

LAT...LON 4146 8753 4146 8809 4161 8798 4181 8797
      4188 8761 4184 8760 4173 8752
TIME...MOT...LOC 0821Z 265DEG 46KT 4168 8740

$$

BMD

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 9, 12:54 AM CDT, 1 hour 39 minutes earlier.

Area forecast discussion, Jun 9, 12:54 AM CDT, 1 hour 39 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1254 AM CDT THU JUN 9 2011

.DISCUSSION...
805 PM CDT

CONVECTIVE EVOLUTION CONTINUES TO BE A CHALLENGE THIS EVENING.
LINE OF STRONG TO SEVERE THUNDERSTORMS CONTINUES TO DEVELOP ALONG
THE COLD FRONTAL BOUNDARY OFF TO THE NORTHWEST FROM NORTHWEST OF
MILWAUKEE SOUTHWESTWARD TO NEAR CEDAR RAPIDS. EASTWARD PROGRESS
HAS BEEN VERY SLOW AND HAVE DELAYED POPS ACROSS MUCH OF THE AREA IN
THE LATEST GRID UPDATE. ADDITIONAL ACTIVITY HAS DEVELOPED AHEAD OF
WHAT WAS THE MAIN LINE SO ARRIVAL IN THE NORTHWEST/NORTHERN TIER
OF COUNTIES LOOKS TO OCCUR IN THE NEXT 1-2 HRS. ADDITIONALLY...LATEST
RADAR SCANS SHOW THAT THE PORTION OF THE LINE ACROSS SOUTHERN WI
IS BEGINNING TO ACCELERATE WITH WHAT APPEARS TO BE A REAR INFLOW
JET DEVELOPING HELPING TO BOW THE LINE EASTWARD WITH A SLIGHT
SOUTHWARD PUSH AS WELL. SEVERE THREAT WILL CONTINUE ACROSS THE
NORTHERN TIER OF COUNTIES AND FAR NORTHWEST CWA WITH DAMAGING
WINDS AND LARGE HAIL THE MAIN THREATS. QUESTIONS REMAIN ABOUT THE
EVOLUTION BEY IND THE NEXT FEW HOURS. WITH ACCELERATION OF THE WI
PORTION OF THE LINE MAY SEE A BREAK DEVELOP DUE WEST OF THE AREA
BUT STILL EXPECT SHOWERS AND STORMS TO MOVE ACROSS THE AREA FROM
WEST TO EAST AS THE FRONT ARRIVES OVERNIGHT. SEVERE THREAT SEEMS
LIMITED TO THE REST OF THE EVENING HOURS WITH THE FLASH FLOOD
THREAT LIKELY THE GREATEST THREAT OVERNIGHT.

MDB

//PREV DISCUSSION...
328 PM CDT

MAIN CONCERNS IN THE VERY NEAR TERM WILL BE CONVECTIVE CHANCES THIS
EVENING AND TEMPERATURE TRENDS THROUGH THE REMAINDER OF THE EVENING.
A COLD FRONT LIES ACROSS CENTRAL WISCONSIN EXTENDING SOUTHWEST INTO
EASTERN IOWA THEN INTO KANSAS. VISIBLE SATELLITE IMAGERY REVEALS
CUMULUS FIELD DEVELOPING ALONG THE BOUNDARY THIS AFTERNOON. THE
ATMOSPHERE AHEAD OF THE FRONT IS QUITE UNSTABLE WITH MLCAPE VALUES
AROUND 3500 J/KG JUST NW OF THE FORECAST AREA PER SPC MESO ANALYSIS.
NAM BUFR SOUNDINGS SHOW A WEAK CAP IN PLACE THROUGH LATE
AFTERNOON/EARLY EVENING WHEN A WEAK MID LEVEL DISTURBANCE OVER THE
FRONT WILL HELP INITIATE CONVECTION ALONG/AHEAD OF THE FRONTAL
BOUNDARY. HIGH RES VSREF AND WRFEMS SHOW CONVECTION INITIATING IN
THE 20-21Z HOUR WITH RUC AND HRRR HOLDING OFF UNTIL 22-23Z WHICH
SEEMS MORE LIKELY.

0-6KM BULK SHEAR VALUES IN THE 20-30KT RANGE ACROSS FAR NORTHERN
ILLINOIS WILL BRING A THREAT FOR ORGANIZED SEVERE TO PORTIONS OF THE
FORECAST AREA THIS EVENING. DEEP LAYER SHEAR BECOMES PARALLEL TO THE
FRONTAL BOUNDARY AS IT SAGS SOUTH ACROSS THE CWA INDICATING THE
POTENTIAL FOR CONVECTION TO BECOME LINEAR THIS EVENING...AND THE
POTENTIAL FOR TRAINING THUNDERSTORMS BRINGING ROUNDS OF HEAVY RAIN
TO SOME AREAS. MOISTURE POOLING ALONG THE BOUNDARY HAS CREATED PWAT
VALUES IN EXCESS OF 1.5 INCHES. 6-HR FLASH FLOOD GUIDANCE THIS
EVENING REMAINS ON THE HIGH SIDE...IN EXCESS OF 2.5 INCHES ACROSS
THE FORECAST AREA...WITH MOST BASINS ABLE TO HANDLE THREE TO FOUR
INCHES. WILL HAVE TO MONITOR FOR LOCALIZED ISSUES OVERNIGHT...BUT
OVERALL NOT TOO CONCERNED WITH ANY WIDESPREAD FLOODING THREAT THIS
EVENING/OVERNIGHT.

TEMPERATURES MID AFTERNOON SPAN FROM THE MID 80S TO THE UPPER 90S
ACROSS THE FORECAST AREA...WITH CLOUD COVER COMPLICATING EARLIER
FORECASTS...ESPECIALLY ACROSS FAR NORTHWESTERN PORTIONS OF THE CWA
WHICH MAY STRUGGLE INTO THE 90S THIS AFTERNOON. TEMPERATURES WILL
LIKELY BE MODERATED BY PRECIP THIS EVENING...BUT OTHERWISE HOLD
STEADY INTO THE EVENING WITH THE THERMAL RIDGE AXIS OVERHEAD FINALLY
SLIDING EAST AS THE COLD FRONT MAKES A PUSH INTO THE FORECAST AREA
TONIGHT. THE FRONTAL BOUNDARY WILL STALL ACROSS SOUTHERN PORTIONS OF
THE CWA TONIGHT. TEMPERATURES OVERNIGHT WILL FALL INTO THE 60S
GENERALLY NORTH OF I-80...AND LOW 70S SOUTH. ALONG THE LAKEFRONT...
TEMPERATURES MAY FALL INTO THE 50S OVERNIGHT.

A SHARP TEMPERATURE CONTRAST IS EXPECTED TO SET UP ACROSS THE THE
FORECAST AREA THURSDAY DUE TO THE LINGERING FRONTAL BOUNDARY.
NORTH OF THE FRONTAL BOUNDARY...TEMPERATURES WILL STAY FAIRLY STEADY
IN THE 60S...AND EVEN 50S ALONG THE LAKEFRONT DURING THE DAY
THURSDAY AS A BRISK NORTHERLY FLOW SETS UP A LONG FETCH OVER THE
COOLER LAKE MICHIGAN WATERS. ACROSS THE FAR SOUTHERN TIER OF
COUNTIES...TEMPERATURES ARE EXPECTED TO RISE INTO THE MID-80S.
CHANCES FOR THUNDER WILL LINGER ALONG THE BOUNDARY...AND BY
THURSDAY NIGHT THE BOUNDARY WILL PUSH NORTH AS A WARM FRONT. MODELS
CONTINUE TO SHOW MCS DEVELOPING OVERNIGHT FRIDAY AS A SHARP TROUGH
BEGINS TO TAKE ON A NEGATIVE TILT. SURFACE LOW WILL DEEPEN IN
RESPONSE TO THE MID LEVEL DISTURBANCE AND WILL FORCE A COLD FRONT
THROUGH THE REGION ON THE DAY SATURDAY. THIS SHOULD FINALLY PROVIDE
A BRIEF RESPITE FROM THE WEATHER ON SUNDAY AS HIGH PRESSURE BUILDS
ACROSS THE UPPER MISSISSIPPI VALLEY INTO THE WESTERN GREAT LAKES
SUNDAY BEHIND THE COLD FRONT...HOWEVER EXTENDED GUIDANCE INDICATES
THAT ACTIVE WEATHER WILL RETURN FOR THE FIRST HALF OF NEXT WEEK.

BMD

&&

.AVIATION...

//ORD AND MDW CONCERNS...UPDATED 06Z...

 * LINGERING SHRA ACTIVITY WITH OCNL TS FOR THE NEXT FEW HRS
 * SHORT PERIOD OF WESTERLY WINDS BEFORE THE WIND SHIFT ASSOCIATED
   WITH THE FRONTAL PASSAGE
 * POTENTIAL FOR MVFR CIGS IN THE MORNING
 * GUSTY NW WINDS THURSDAY AFTERNOON

SHEA

//DISCUSSION...UPDATED 06Z...

SHOWER AND THUNDERSTORM ACTIVITY BROKE OUT ACROSS THE REGION LATE
LAST EVENING AND IS STILL WORKING TO THE SOUTH. THE MAIN FRONTAL
BOUNDARY STILL REMAINS TO THE WEST...GENERALLY ON A LINE FROM GRB
SOUTHWEST TO DBQ AND THEN STJ. THE BRUNT OF THE SHOWER AND
THUNDERSTORM ACTIVITY HAS TRANSITIONED SOUTH...THOUGH THERE WILL
BE SOME LINGERING SHOWERS AND THE OCCNL CLAP OF THUNDER OVER THE
NEXT FEW HOURS. THE MAIN FRONT HAS NOT MADE GOOD PROGRESS
OVERNIGHT AND LIKELY WONT MOVE THROUGH THE EASTERN TERMINALS UNTIL
THE 09Z TIME FRAME. WAVE WORKING NORTHWEST ACROSS THE PLAINS
SHOULD MOVE ACROSS THE NORTHERN ILLINOIS REGION AND MAY REIGNITE
SOME SHOWER ACTIVITY/KEEP IT GOING. CONFIDENCE ISNT THE HIGHEST WITH
HOW MUCH ACTIVITY WILL REDEVELOP AND WHAT THE COVERAGE WILL LIKELY
BE. WILL MAINTAIN A VCSH THOUGH SOME SHOWERS MAY WORK THEIR WAY
OVER THE TERMINALS IN THAT TIME. FORECAST SOUNDINGS REMAIN
RELATIVELY MOIST IN THE MORNING WITH FLOW OFF OF THE LAKE...AND
STILL HINT AT SOME MVFR CIGS DEVELOPING...THOUGH GUIDANCE HAS
BACKED OFF SOME AND DID FOLLOW THAT TREND SLIGHTLY. WINDS GUSTS TO
AGAIN PICK UP IN THE AFTERNOON AND GENERALLY PEAK IN THE 20 KT
RANGE OUT OF THE NORTHWEST.

NEXT AND MORE PROMINENT WAVE IS CURRENTLY BEING EJECTED ACROSS THE
FOUR CORNER STATES AND SHOULD WORK NORTH ACROSS THE PLAINS TODAY.
WITH IT...LOW PRESSURE WILL ATTEMPT TO BUILD ACROSS PLAINS AND MOVE
NORTHEAST. THE STALLED BOUNDARY THAT WAS THE REMNANTS OF THE STORM
SYSTEM TONIGHT...WILL AGAIN LIFT TO THE NORTH AND ACROSS THE
TERMINALS. WITH THIS...EXPECT IT TO BRING THE RENEWED CHANCES FOR
SHOWERS AND THUNDERSTORMS...GENERALLY BEYOND 09Z ON THE 10TH.

SHEA

//ORD AND MDW CONFIDENCE...UPDATED 06Z...

 * MEDIUM CONFIDENCE ON LINGERING SHRA ACTIVITY...LOW ON
   REDEVELOPMENT IN THE MORNING HOURS
 * MEDIUM IN MVFR CIGS THIS AM
 * MEDIUM HIGH ON WINDS FORECAST INCLUDING WIND SHIFT

SHEA

//OUTLOOK FOR ORD/MDW FOR 12Z FRIDAY-12Z WEDNESDAY...UPDATED 00Z...

FRIDAY...MVFR POSSIBLE. TSRA LIKELY.
SATURDAY...VFR. CHANCE OF SHRA EARLY.
SUNDAY...VFR.
MONDAY...VFR. CHANCE OF TSRA.
TUESDAY...VFR. CHANCE OF TSRA.

SHEA

&&

.MARINE...
121 PM CDT

A DIFFUSE AREA OF LOW PRESSURE OVER CENTRAL LAKE SUPERIOR WILL
CONTINUE TO MOVE EAST THIS AFTERNOON...REACHING EASTERN ONTARIO BY
THIS EVENING. AS THIS LOW HEADS OFF ACROSS SOUTHEAST CANADA...A
TRAILING COLD FRONT WILL PUSH SOUTHWARD ACROSS LAKE MICHIGAN
TONIGHT...SHIFTING WINDS FROM SOUTHWEST...INTO THE NORTH. A MODEST
NORTH TO NORTHEAST WIND FLOW ACROSS LAKE MICHIGAN WILL ESTABLISH
ITSELF BY THURSDAY...AND CONTINUE INTO THURSDAY NIGHT.  THIS IS
EXPECTED TO RESULT IN END OF FETCH WAVES THAT WILL REACH OR EXCEED
SMALL CRAFT CRITERIA. IN THE WAKE OF THIS FRONT...A HIGH PRESSURE
CENTER WILL BUILD ACROSS WESTERN ONTARIO AND THE UPPER GREAT LAKES
REGION THURSDAY. THIS HIGH WILL CENTER ITSELF OVER EASTERN ONTARIO
BY FRIDAY MORNING...AS A TROUGH OF LOW PRESSURE MOVES NORTHEAST OUT
OF THE CENTRAL PLAINS. THIS LOW WILL CROSS THE MID MISSISSIPPI
VALLEY BY MID DAY FRIDAY...AND CONTINUE ACROSS THE SOUTHERN GREAT
LAKES BY FRIDAY NIGHT.

MERZLOCK

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...NONE.
IN...NONE.
LM...NONE.
&&

Hazardous weather outlook, Jun 8, 3:49 PM CDT, 10 hours 44 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 9, 12:26 AM CDT, 2 hours 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1226 AM CDT THU JUN 09 2011

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

1016 PM     TSTM WND DMG     BYRON                   42.13N 89.26W
06/08/2011                   OGLE               IL   LAW ENFORCEMENT

            POWER LINES AND TREES DOWN.

1004 PM     TSTM WND DMG     FORRESTON               42.13N 89.58W
06/08/2011                   OGLE               IL   LAW ENFORCEMENT

            TREES AND POWER LINES DOWN.

1217 AM     HAIL             ELWOOD                  41.41N 88.11W
06/09/2011  E0.25 INCH       WILL               IL   TRAINED SPOTTER

            NEAR BASELINE RE AND ARSENAL RD.

&&

CM

Local storm report, Jun 9, 12:47 AM CDT, 1 hour 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1247 AM CDT THU JUN 09 2011

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

1153 PM     TSTM WND DMG     3 S SUGAR GROVE         41.73N 88.46W
06/08/2011                   KANE               IL   LAW ENFORCEMENT

            LARGE TREES DOWN - IL47 AND BASELINE RD.

1150 PM     TSTM WND DMG     PLANO                   41.66N 88.53W
06/08/2011                   KENDALL            IL   LAW ENFORCEMENT

            TELEPHONE POLE SNAPPED. NEAR FOX RIVER DR.

1210 AM     TSTM WND DMG     LISBON                  41.48N 88.48W
06/09/2011                   KENDALL            IL   LAW ENFORCEMENT

            TREE DOWN NEAR US52 AND LISBON RD.

1240 AM     HAIL             BRADLEY                 41.15N 87.86W
06/09/2011  E0.75 INCH       KANKAKEE           IL   TRAINED SPOTTER

            HAIL RANGED FROM 1/2 INCH TO 3/4 INCH.

&&

CM

Local storm report, Jun 9, 1:12 AM CDT, 1 hour 21 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
112 AM CDT THU JUN 09 2011

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

0837 PM     TSTM WND DMG     ROCKTON                 42.45N 89.07W
06/08/2011                   WINNEBAGO          IL   PUBLIC

            SMALL LIMBS AND LEAVES DOWN

0837 PM     TSTM WND DMG     SOUTH BELOIT            42.48N 89.03W
06/08/2011                   WINNEBAGO          IL   BROADCAST MEDIA

            5 INCH BRANCH DOWN.

0845 PM     TSTM WND DMG     POPLAR GROVE            42.37N 88.82W
06/08/2011                   BOONE              IL   TRAINED SPOTTER

            A FEW SHINGLES BLOWN OF HOUSE. 6 FOOT ASH TREE, 3 IN DIA
            TRUNK SNAPPED AT 1 FOOT ABOVE GROUND.

0845 PM     TSTM WND GST     MACHESNEY PARK          42.36N 89.04W
06/08/2011  M55.00 MPH       WINNEBAGO          IL   TRAINED SPOTTER

0856 PM     TSTM WND GST     SOUTH BELOIT            42.48N 89.03W
06/08/2011  M55.00 MPH       WINNEBAGO          IL   TRAINED SPOTTER

            ROUTE 251 AND RALSTON ROAD. TEMP DROP 20 DEGREES.

0921 PM     HAIL             ROSCOE                  42.42N 89.01W
06/08/2011  E0.50 INCH       WINNEBAGO          IL   TRAINED SPOTTER

            ROSCOE RD AND US251

0924 PM     TSTM WND DMG     SPRING GROVE            42.44N 88.24W
06/08/2011                   MCHENRY            IL   TRAINED SPOTTER

            ROUTE 12 AND WINNEBAGO ROAD JUST WEST OF INTERSECTION 20
            TO 30 YEAR OLD TREE SNAPPED. TRUNK DIAMETER ESTIMATED AT
            1 FOOT.

0953 PM     TSTM WND DMG     VERNON HILLS            42.24N 87.96W
06/08/2011                   LAKE               IL   TRAINED SPOTTER

            15 FT LONG- 3IN DIA BRANCH DOWN.

1003 PM     HAIL             WINNEBAGO               42.27N 89.24W
06/08/2011  E1.75 INCH       WINNEBAGO          IL   BROADCAST MEDIA

            AT WREX-TV STUDIOS.

1003 PM     HAIL             ROSCOE                  42.42N 89.01W
06/08/2011  E0.50 INCH       WINNEBAGO          IL   BROADCAST MEDIA

            REPORTED BY CO-WORKER OF WTVO.

1004 PM     TSTM WND DMG     FORRESTON               42.13N 89.58W
06/08/2011                   OGLE               IL   LAW ENFORCEMENT

            TREES AND POWER LINES DOWN.

1004 PM     TSTM WND DMG     FORRESTON               42.13N 89.58W
06/08/2011                   OGLE               IL   LAW ENFORCEMENT

            POWER LINES AND TREES DOWN. REPORT RELAYED FROM OGLE
            COUNTY SHERIFF. TIME ESTIMATED FROM RADAR.

1007 PM     HAIL             GRAYSLAKE               42.35N 88.04W
06/08/2011  E0.50 INCH       LAKE               IL   TRAINED SPOTTER

            WEST TRAIL RD AND PATRICIA COURT.

1010 PM     TSTM WND GST     POPLAR GROVE            42.37N 88.82W
06/08/2011  E60.00 MPH       BOONE              IL   TRAINED SPOTTER

1011 PM     TSTM WND GST     ROCKFORD AIRPORT        42.20N 89.10W
06/08/2011  M60.00 MPH       WINNEBAGO          IL   ASOS

1012 PM     HAIL             POPLAR GROVE            42.37N 88.82W
06/08/2011  E1.00 INCH       BOONE              IL   COCORAHS

            3/4 TO 1 INCH HAIL.

1012 PM     HAIL             POPLAR GROVE            42.37N 88.82W
06/08/2011  E1.00 INCH       BOONE              IL   TRAINED SPOTTER

            SIZE RANGED FROM PENNY TO QUARTER.

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

            APPLETON RD AND EAST STATE ST.

1015 PM     HAIL             1 NE BELVIDERE          42.26N 88.83W
06/08/2011  E0.50 INCH       BOONE              IL   COCORAHS

1016 PM     TSTM WND DMG     BYRON                   42.13N 89.26W
06/08/2011                   OGLE               IL   LAW ENFORCEMENT

            POWER LINES AND TREES DOWN.

1016 PM     TSTM WND DMG     BYRON                   42.13N 89.26W
06/08/2011                   OGLE               IL   LAW ENFORCEMENT

            POWER LINES AND TREES DOWN. REPORT RELAYED FROM OGLE
            COUNTY SHERIFF. TIME ESTIMATED FROM RADAR.

1020 PM     FLOOD            ROCKFORD                42.27N 89.06W
06/08/2011                   WINNEBAGO          IL   TRAINED SPOTTER

            8 TO 10 INCHES OF WATER DOWNTOWN AT W 8TH ST AND CORT ST.

1022 PM     HAIL             3 S BELVIDERE           42.21N 88.85W
06/08/2011  E1.75 INCH       BOONE              IL   TRAINED SPOTTER

            ESTIMATED HAIL FROM MARBLE TO GOLFBALL IN SIZE. SPOTTER
            WAS SOUTH OF BELVIDERE. WINDS ESTIMATED TO 45 MPH.

1022 PM     HAIL             BELVIDERE               42.25N 88.85W
06/08/2011  E1.75 INCH       BOONE              IL   TRAINED SPOTTER

            SOUTH OF BELVIDERE - MARBLE TO GOLF BALL SIZED HAIL. VIA
            BROADCAST MEDIA.

1023 PM     HAIL             BELVIDERE               42.25N 88.85W
06/08/2011  E0.50 INCH       BOONE              IL   PUBLIC

            PUBLIC REPORT VIA BROADCAST MEDIA.

1029 PM     HAIL             POLO                    41.98N 89.58W
06/08/2011  E1.00 INCH       OGLE               IL   EMERGENCY MNGR

1033 PM     TSTM WND DMG     PLANO                   41.66N 88.53W
06/08/2011                   KENDALL            IL   LAW ENFORCEMENT

            TREE LIMB ON CAR. TIME ESTIMATED BASED ON RADAR.

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

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.

1050 PM     TSTM WND DMG     ROCKFORD                42.27N 89.06W
06/08/2011                   WINNEBAGO          IL   TRAINED SPOTTER

            6 IN DIA TREE SNAPPED. ALPINE RD AND HARRISON.

1050 PM     TSTM WND GST     2 N PINGREE GROVE       42.10N 88.41W
06/08/2011  E50.00 MPH       KANE               IL   EMERGENCY MNGR

            REINKEN RD NORTHWEST OF IL72. ALSO PEA SIZE HAIL.

1051 PM     TSTM WND DMG     MACHESNEY PARK          42.36N 89.04W
06/08/2011                   WINNEBAGO          IL   TRAINED SPOTTER

            10 INCH DIA TREE DOWN. WILSON WATERVIEW. POSSIBLE
            LIGHTNING DAMAGE.

1105 PM     HAIL             LAKE ZURICH             42.19N 88.09W
06/08/2011  E0.50 INCH       LAKE               IL   TRAINED SPOTTER

            AT ROUTE 12 AND ROUTE 22.

1116 PM     HAIL             1 SE BARTLETT           41.97N 88.19W
06/08/2011  E0.25 INCH       DUPAGE             IL   COCORAHS

1117 PM     HAIL             2 N ELBURN              41.92N 88.47W
06/08/2011  E0.25 INCH       KANE               IL   TRAINED SPOTTER

1121 PM     HAIL             FRANKLIN GROVE          41.84N 89.30W
06/08/2011  E0.88 INCH       LEE                IL   EMERGENCY MNGR

1139 PM     TSTM WND GST     GLEN ELLYN              41.87N 88.06W
06/08/2011  M55.00 MPH       DUPAGE             IL   TRAINED SPOTTER

1150 PM     TSTM WND DMG     PLANO                   41.66N 88.53W
06/08/2011                   KENDALL            IL   LAW ENFORCEMENT

            TELEPHONE POLE SNAPPED. NEAR FOX RIVER DR.

1153 PM     TSTM WND DMG     3 S SUGAR GROVE         41.73N 88.46W
06/08/2011                   KANE               IL   LAW ENFORCEMENT

            LARGE TREES DOWN - IL47 AND BASELINE RD.

1210 AM     TSTM WND DMG     LISBON                  41.48N 88.48W
06/09/2011                   KENDALL            IL   LAW ENFORCEMENT

            TREE DOWN NEAR US52 AND LISBON RD.

1217 AM     HAIL             ELWOOD                  41.41N 88.11W
06/09/2011  E0.25 INCH       WILL               IL   TRAINED SPOTTER

            NEAR BASELINE RE AND ARSENAL RD.

1240 AM     HAIL             BRADLEY                 41.15N 87.86W
06/09/2011  E0.75 INCH       KANKAKEE           IL   TRAINED SPOTTER

            HAIL RANGED FROM 1/2 INCH TO 3/4 INCH.

&&
THIS REPORT WILL BE UPDATED IF ADDITIONAL STROM REPORTS ARE RECEIVED.

CM

Special weather statement, Jun 9, 1:44 AM CDT, 49 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
144 AM CDT THU JUN 9 2011

ILZ003>006-008-011-012-014-090730-
BOONE IL-COOK IL-DE KALB IL-KANE IL-LAKE IL-MCHENRY IL-OGLE IL-
WINNEBAGO IL-
144 AM CDT THU JUN 9 2011

...SPECIAL WEATHER STATEMENT...

AT 139 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE
OF RAPIDLY DEVELOPING THUNDERSTORMS FROM KINGSTON SOUTHWEST TOWARDS
DAVIS JUNCTION. THUNDERSTORMS ARE MOVING EAST AT 45 MPH.

NICKEL SIZE HAIL AND BRIEF MODERATE DOWNPOURS ARE POSSIBLE WITH THESE
STORMS.

LOCATIONS IMPACTED INCLUDE...
  GENOA...              KINGSTON...           KIRKLAND...
  MARENGO...            HAMPSHIRE...          HUNTLEY...
  LAKEWOOD...           LAKE IN THE HILLS...  GILBERTS...
  SLEEPY HOLLOW...      ALGONQUIN...          BULL VALLEY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAINFALL CAN LEAD TO FLOODING OF LOW LYING AREAS SUCH AS
DITCHES...VIADUCTS...UNDERPASSES...CREEKS AND DRAINAGE AREAS. SEEK
SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED.

LAT...LON 4237 8820 4210 8806 4199 8910 4211 8916

BMD

Special weather statement, Jun 9, 2:02 AM CDT, 31 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
202 AM CDT THU JUN 9 2011

ILZ003-008-090745-
OGLE IL-WINNEBAGO IL-
202 AM CDT THU JUN 9 2011

...SPECIAL WEATHER STATEMENT...

AT 200 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG
THUNDERSTORM NEAR FORRESTON...MOVING EAST AT 35 MPH.

NICKEL SIZE HAIL AND HEAVY DOWNPOURS ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
  FORRESTON...          MOUNT MORRIS...       PECATONICA...
  BYRON...              WINNEBAGO...          ROCKFORD AIRPORT...
  STILLMAN VALLEY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAINFALL CAN LEAD TO FLOODING OF LOW LYING AREAS SUCH AS
DITCHES...VIADUCTS...UNDERPASSES...CREEKS AND DRAINAGE AREAS. SEEK
SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED.

LAT...LON 4220 8969 4221 8941 4234 8940 4241 8920
      4213 8904 4198 8969 4220 8970

BMD

Special weather statement, Jun 9, 2:30 AM CDT, 3 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
230 AM CDT THU JUN 9 2011

ILZ010-090800-
LEE IL-
230 AM CDT THU JUN 9 2011

...SPECIAL WEATHER STATEMENT...

AT 226 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG
THUNDERSTORM 15 MILES SOUTHWEST OF WALTON...MOVING EAST AT 35 MPH.

NICKEL SIZE HAIL AND BRIEF HEAVY DOWNPOURS ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
  WALTON...             AMBOY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAINFALL CAN LEAD TO FLOODING OF LOW LYING AREAS SUCH AS
DITCHES...VIADUCTS...UNDERPASSES...CREEKS AND DRAINAGE AREAS. SEEK
SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED.

LAT...LON 4176 8931 4158 8927 4158 8950 4158 8963
      4159 8964 4170 8964

BMD

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, 11:43 PM CDT	Severe Thunderstorm Warning	LOT	Kendall	47 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, 2:37 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

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.