Alert archive / Illinois / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 80, NWS Chicago, IL

June 4, 2011Ford County, Iroquois County, Illinois

NWS Chicago, IL issued this severe thunderstorm warning at Jun 4, 2011, 8:31 PM CDT for Ford County, Iroquois County, Illinois. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 4, 2011, 8:31 PM CDT (01:31 UTC)
Expired
Jun 4, 2011, 9:15 PM CDT
In force
44 min
Issued by
NWS Chicago, IL
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Ford County, IL, Iroquois County, IL

The radar

The Lincoln radar (KILX), 119 km from the middle of the area, began a volume at 01:34 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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 watch it was issued in

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

IssuedProductOfficeLasted
Jun 4, 2:08 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.5 hours before the alert went out and 63 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 00:00Z on 2011-06-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2793 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 00:00Z on 2011-06-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 square meters per square second.1939Sfc1 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
2793 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
1719 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
49 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.1

Open this sounding in Storm Lab

The text

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

723 
WUUS53 KLOT 050131
SVRLOT
ILC053-075-050215-
/O.NEW.KLOT.SV.W.0080.110605T0131Z-110605T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHICAGO IL
ISSUED BY NATIONAL WEATHER SERVICE LINCOLN IL
831 PM CDT SAT JUN 4 2011

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN FORD COUNTY IN EAST CENTRAL ILLINOIS...
  SOUTHWESTERN IROQUOIS COUNTY IN EAST CENTRAL ILLINOIS...

* UNTIL 915 PM CDT

* AT 829 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
  WEST OF BUCKLEY...OR 8 MILES NORTH OF PAXTON...AND MOVING EAST AT
  20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  PAXTON...BUCKLEY...CISSNA PARK AND LODA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE 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.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4051 8829 4068 8821 4049 8760 4048 8763
      4048 8793 4040 8794 4040 8813
TIME...MOT...LOC 0131Z 288DEG 18KT 4056 8813
WIND...HAIL 60MPH 1.00IN

$$

BARKER
1 follow-up statement
362 
WWUS53 KLOT 050140
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
ISSUED BY NATIONAL WEATHER SERVICE LINCOLN IL
840 PM CDT SAT JUN 4 2011

ILC053-075-050215-
/O.CON.KLOT.SV.W.0080.000000T0000Z-110605T0215Z/
FORD IL-IROQUOIS IL-
840 PM CDT SAT JUN 4 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
IROQUOIS AND SOUTHEASTERN FORD COUNTIES UNTIL 915 PM CDT...

AT 838 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
BUCKLEY...OR 6 MILES NORTH OF PAXTON...MOVING EAST AT 20 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE 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 4040 8813 4065 8812 4049 8760 4048 8763
      4048 8793 4040 8794
TIME...MOT...LOC 0140Z 288DEG 18KT 4055 8807
WIND...HAIL 60MPH 1.00IN

$$

BARKER

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 4, 6:23 PM CDT, 2 hours 8 minutes earlier.

Area forecast discussion, Jun 4, 6:23 PM CDT, 2 hours 8 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
623 PM CDT SAT JUN 4 2011

.MESOSCALE DISCUSSION...
425 PM CDT

CURRENTLY MONITORING SOUTH EASTERN WILL COUNTY AND NORTHERN
KANKAKEE COUNTY OVER THE NEXT 15 TO 30 MINUTES ALONG THE
INTERSECTION OF THE LAKE BOUNDARY AND THE THUNDERSTORMS WORKING
EAST. THIS AREA IS WHERE THE POTENTIAL TORNADIC THREAT WILL BE
ENHANCED. WHILE THE ATMOSPHERE IS NOT GENERALLY PRIMED FOR
TORNADOGENESIS...THIS INTERSECTION WOULD BE SUFFICIENT FOR
MESOVORTEX GENERATION.

SHEA

238 PM CDT

BAND OF WEAK...LIKELY SOMEWHAT ELEVATED...CONVECTION EXTENDS FROM
SOUTHERN IOWA EAST-NORTHEAST INTO NORTH CENTRAL ILLINOIS. A RECENT
ACARS SOUNDING FROM ORD SHOWS THAT THE CAP/INVERSION IS WEAKENING
AND LIKELY FEELING THE EFFECTS OF LARGE SCALE ASCENT. THIS WOULD
ALSO LIKELY EXPLAIN THE RECENT UPTICK IN CUMULUS DEVELOPMENT OVER
EASTERN PORTIONS OF OUR CWA. AS THE CURRENT ELEVATED CONVECTION
CONTINUES EASTWARD INTO REGION OF WEAKER CONVECTIVE INHIBITION WOULD
ANTICIPATE EXPLOSIVE INTENSIFICATION OF THESE STORMS...LIKELY WITHIN
THE HOUR. STILL ANTICIPATE MAINLY A MARGINAL HAIL AND OCCASIONAL
MICROBURST TO BE THE PRIMARY SEVERE THREATS...WITH FLASH FLOODING
BEING A POTENTIALLY LARGER HAZARD. LAKE BREEZE BOUNDARY CONTINUES TO
CHARGE INLAND FROM LAKE MICHIGAN AND WHILE BOUNDARY LAYER BEHIND THE
LAKE BREEZE BOUNDARY IS COOLER/LESS UNSTABLE...ANY WELL DEVELOPED
SEVERE STORMS THAT CROSS INTO THE COOL AIR COULD STILL POSE A SEVERE
THREAT FOR SOME LENGTH OF TIME BEFORE WEAKENING.

IZZI

1252 PM CDT...
SHALLOW CONVECTION THAT HAD BEEN DEVELOPING ALONG THE OUTFLOW
BOUNDARY OVER NORTHWESTERN ILLINOIS HAS CHOKED ON THE CONVECTIVE
INHIBITION AS THEY MOVED EAST. A COUPLE OF RECENT ACARS SOUNDINGS
FROM ORD SHOW A VERY FORMIDABLE CAP PRESENT...MUCH STRONGER THAN
WHAT HAD BEEN FORECAST BY MOST MODELS. IN FACT...PLUGGING IN
CURRENT T/TD AT ORD INTO ONE OF THESE SOUNDINGS YIELDS SBCINH
AROUND 100 J/KG. THIS SHOULD BE MORE THAN SUFFICIENT TO NOT ONLY
PREVENT CONVECTION FROM FIRING ALONG THIS QUICKLY ADVANCING
OUTFLOW BOUNDARY...BUT ALSO KEEP A LID ON ANY CONVECTION FIRING
ALONG THE LAKE BREEZE FOR THE NEXT HOUR OR TWO AT LEAST.

RADAR/SATELLITE TRENDS HAVE SHOWN A RECENT DEEPENING OF CONVECTION
OVER SOUTHERN/EASTERN IOWA...WHICH IS LIKELY INDICATIVE OF A WEAKER
CAP IN PLACE THERE AS HEIGHT FALLS AND A GLANCING BLOW OF UVV'S FROM
SHORTWAVE PASSING BY TO THE NORTH LIKELY HAVE ERODED THE CAP
SOMEWHAT. THIS TREND SHOULD CONTINUE EASTWARD INTO NORTHERN ILLINOIS
AND NOW THINKING THAT THE CONVECTION OVER EASTERN/SOUTHERN IOWA HAS
A BETTER CHANCE OF BECOMING THE MORE ROBUST AND SUSTAINABLE
CONVECTION/SEVERE THREAT FOR US THIS AFTERNOON. THE ORIENTATION OF
THIS CONVECTION IS EVEN MORE EAST-WEST THAN WITH THE INITIAL OUTFLOW
SURGE AND AGAIN COULD POSE A VERY REAL THREAT FOR FLASH FLOODING.

IZZI

1145 AM CDT...
ATMOSPHERE CONTINUES TO COOK OVER THE CWA THIS MORNING WITH FULL
SUNSHINE ALLOWING TEMPS TO CLIMB INTO THE MID-UPPER 80S WITH
DEWPOINTS IN THE LOWER 70S. MODIFYING MORNING SOUNDINGS FOR
CURRENT CONDITIONS AND SPC MESOANALYSIS BOTH SUGGEST ATMOSPHERE IS
GROWING STRONGLY UNSTABLE WITH CONVECTIVE INHIBITION QUICKLY
DECREASING.

ONE ROGUE LONG-LIVED THUNDERSTORM CONTINUES TO TRACK ALONG THE
IL/WI BORDER WITH HIGH RESOLUTION VISIBLE SATELLITE IMAGERY
SHOWING AN OUTFLOW BOUNDARY ARCING SOUTH THEN SOUTHWEST FROM THIS
CELL. THIS OUTFLOW BOUNDARY WOULD CERTAINLY SEEM TO BE A PRIME
CANDIDATE TO FOCUS CONVECTIVE INITIATION THIS AFTERNOON AS
REMAINING CONVECTIVE INHIBITION IS REMOVED.

STRONGLY VEERED LOW LEVEL FLOW IS REDUCING DEEP LATER SHEAR
VALUES WITH THE STRONGEST SHEAR IN THE POST FRONTAL/OUTFLOW
ENVIRONMENT. EVEN STILL...30-40KT OF FLOW IN THE 6KM LAYER SHOULD
BE SUFFICIENT TO RESULT IN 20-30KT OF DEEP LAYER SHEAR AND
EVOLUTION INTO ORGANIZED MULTI-CELLULAR CLUSTER.

DESPITE THE SOMEWHAT MARGINAL DEEP LAYER SHEAR VALUES...MLCAPE
VALUES OVER 3500 J/KG AND STEEP MID-LEVEL LAPSE RATES STILL
SUPPORT A THREAT FOR LARGE HAIL...PARTICULARLY BEFORE CONVECTION
MORPHS INTO LINE/CLUSTER. STRONG INSTABILITY/STEEP LAPSE RATES
ALSO SUPPORT A THREAT OF WET-MICROBURSTS AND LOCALIZED WIND
DAMAGE. THREAT FOR WIND DAMAGE COULD TEND TO INCREASE OVER OUR SE
CWA AS CONVECTION WILL HAVE MORE TIME/OPPORTUNITY TO HAVE
DEVELOPED A COLD POOL AND MESOSCALE ORGANIZATION BY THAT POINT.

PROBABLY ONE OF THE BIGGER THREATS THIS AFTERNOON COULD EVOLVE INTO
HEAVY RAINFALL/FLASH FLOODING...ESPECIALLY SOUTH OF INTERSTATE 80.
THE VERY MOIST ENVIRONMENT AND HIGH PRECIPITATION EFFICIENCY COULD
RESULT IN SOME EXTREME RAINFALL RATES...POSSIBLY OVER TWO INCHES
PER HOUR. OUTFLOW BOUNDARY/FRONT IS BECOMING ORIENTED MORE EAST-
WEST OVER SOUTHEAST IOWA INTO NW IL WHICH IS MORE ALIGNED WITH
THE MEAN FLOW AND ANTICIPATED STORM MOTION. THIS COULD RESULT IN
AT LEAST SOME TEMPORARY TRAINING CELLS...WHICH GIVEN POTENTIAL FOR
SUCH HIGH PRECIP RATES COULD RESULT IN FLASH FLOODING. DID
CONSIDER A SHORT FUSED FLASH FLOOD WATCH BUT DECIDED TO JUST HIT
THE POTENTIAL HARD IN HWO SINCE IT IS NOT CURRENTLY EXPECTED TO
TURN INTO ANYTHING VERY WIDESPREAD OF MAJOR.

IZZI

&&

.DISCUSSION...
330 PM CDT

WITH THE ACTIVITY FLARING UP ACROSS THE REGION...WILL KEEP THE
DISCUSSION SHORT THIS AFTERNOON...AND FOCUSED ON THE TIMEFRAME
BEYOND THE CURRENT ACTIVITY...AND EXPECT ACTIVITY TO WIND DOWN
PRETTY QUICKLY THIS EVENING FROM NORTH TO SOUTH.

THE PATTERN WILL STAY SOMEWHAT UNSETTLED FOR THE NEXT FEW DAYS AS
THE FRONT THAT IS CURRENTLY WORKING THROUGH THE AREA...STALLS OUT
TO THE SOUTH. THIS AREA WILL FOCUS SHOWER AND THUNDERSTORM
ACTIVITY SOUTH OF THE I80 CORRIDOR AND OUTSIDE OF THE CHICAGO AND
ROCKFORD METROS. THE OVERNIGHT PERIOD WILL BE A LITTLE BIT OF A
REPRIEVE AS THE COOLER AND DRIER AIR FILTERS IN FROM THE
NORTH...AND EXPECT TEMPERATURES TO BE ON AVERAGE 10 TO 15 DEGREES
COOLER THAN LAST NIGHT AND SIGNIFICANTLY LESS HUMID.

UPPER LEVEL RIDGE ACROSS THE SOUTHERN CONUS WILL CONTINUE TO
RETREAT WEST AND ACROSS THE PLAINS...ORIENTING THE UPPER LEVEL
FLOW TO BE OUT OF THE NORTHWEST. IT CONTINUES TO BE DIFFICULT TO
TIME IN WAVES THAT WILL TOP THE RIDGE AND ADVANCE ACROSS THE AREA
THROUGH MIDWEEK...AND WILL KEEP THE MENTION FOR SHOWERS AND
THUNDERSTORMS AGAIN ON MONDAY AS IT IS DIFFICULT TO TIME IN A WEAK
WAVE THAT IS FORECAST TO RIDE ACROSS. EARLY NEXT WEEK...A STRONGER
WAVE WILL ROUND THE BASE OF A TROUGH ACROSS THE WESTERN CONUS AND
LIFT THROUGH THE CENTRAL ROCKIES AND INTO THE WESTERN HALF OF THE
NORTHERN PLAINS. THIS WILL LIFT A SURFACE LOW THROUGH THAT AREA.
EXTENDING TO THE EAST OF THIS LOW WILL LIFT A WARM FRONTAL
BOUNDARY...THAT WAS THE PREVIOUS BOUNDARY THAT DROPPED SOUTH TODAY
AND STALLED ACROSS CENTRAL ILLINOIS. THIS WILL BRING OUR AREA BACK
TO THE WARM SECTOR AND TEMPERATURES WILL AGAIN JUMP UP INTO TO THE
UPPER 80S TO LOW 90S...ALL OF THE WAY TO THE LAKE.

A FEW OF THE LONGER RANGE MODELS ARE ATTEMPTING TO KICK OUT SOME
LIGHT SHOWERS TUESDAY AFTERNOON. ATMOSPHERE DOES LOOK LIKE
INSTABILITY SHOULD JUMP THAT AFTERNOON BUT THINK WE WILL BE WELL
INTO THE WARM SECTOR AND LIKELY CAPPED. NOT SEEING MUCH OF WHAT
COULD BE ABLE TO LIFT THAT FEATURE AND WILL KEEP THE WORDING DRY
THROUGH THAT TIME. SIMILAR TO WHAT IS HAPPENING TODAY...EXPECT
ANOTHER COLD FRONT TO DRAPE ACROSS THE REGION AND MOVE THROUGH IN
THE AFTERNOON AND EVENING OF WEDNESDAY. SHEA

&&

.AVIATION...

//ORD AND MDW CONCERNS...UPDATED 00Z...

* NORTHEAST WIND THIS EVENING.

PAW

//DISCUSSION...UPDATED 00Z...

FRONTAL BOUNDARY HAS PUSHED TSRA SOUTH OF THE TERMINALS. LIGHT
NORTH TO NORTHEAST WINDS AND VFR CONDITIONS BEHIND THE FRONT.

PAW

//ORD AND MDW CONFIDENCE...UPDATED 00Z...

* HIGH CONFIDENCE IN FORECAST ELEMENT.S

PAW

//OUTLOOK FOR ORD/MDW FOR 12Z MONDAY-12Z SATURDAY...UPDATED 00Z...

MONDAY...

TUESDAY...

WEDNESDAY...

THURSDAY...

FRIDAY...

PAW

&&

.MARINE...
253 PM CDT

APART FROM THE POSSIBILITY OF THUNDERSTORMS THIS EVENING AND AGAIN
EARLY NEXT WEEK...WINDS AND WAVES ON THE LAKE SHOULD BE RELATIVELY
QUIET OVER THE NEXT FEW DAYS UNDER THE INFLUENCE OF AN APPROACHING
CENTER OF HIGH PRESSURE. TODAY A LOW PRESSURE CENTER OVER JAMES
BAY HAS DRAGGED A TRAILING COLD FRONT SOUTHEAST ACROSS LAKE
MICHIGAN. THE FRONT SITS JUST SOUTH OF THE LAKE AS OF MID
AFTERNOON AND WILL CONTINUE TO DRIFT TOWARD THE OHIO VALLEY
TONIGHT AND TOMORROW. HIGH PRESSURE BUILDS ACROSS THE WESTERN
GREAT LAKES TONIGHT BEHIND THE FRONT AND WILL DRIFT SLOWLY ACROSS
THE CENTRAL GREAT LAKES THROUGH MONDAY. LOW PRESSURE WILL DEVELOP
ACROSS THE NORTHERN HIGH PLAINS TUESDAY...WHICH WILL HELP TO LIFT
THE FRONT BACK NORTH FROM THE OHIO VALLEY AND ACROSS THE WESTERN
LAKES AS A WARM FRONT.

LENNING

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...NONE.
IN...NONE.
LM...NONE.
&&
Hazardous weather outlook, Jun 4, 2:46 PM CDT, 5 hours 45 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
246 PM CDT SAT JUN 4 2011

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
052000-
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-
246 PM CDT SAT JUN 4 2011 /346 PM EDT SAT JUN 4 2011/

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

  WEATHER HAZARDS EXPECTED:

  STRONG THUNDERSTORMS WHICH MAY PRODUCE:

  * DAMAGING WINDS IN EXCESS OF 60 MPH
  * HALF DOLLAR SIZED HAIL
  * HEAVY RAINFALL WITH LOCALIZED FLASH FLOODING

  AREAS AFFECTED AND TIMING:

  * THUNDERSTORMS ARE ANTICIPATED TO DEVELOP ALONG AND AHEAD OF A
    COLD FRONT ACROSS NORTHERN ILLINOIS AND NORTHWEST INDIANA THIS
    AFTERNOON AND POSSIBLY LINGER INTO THE EARLY EVENING SOUTH OF
    THE KANKAKEE RIVER.

  DISCUSSION:

   * A COLD FRONT WILL CONTINUE TO MOVE SLOWLY SOUTHWARD ACROSS
     THE REGION THIS AFTERNOON. THE ATMOSPHERE HAS BECOME
     EXTREMELY UNSTABLE AHEAD OF THE FRONT...WHICH SHOULD ALLOW
     THUNDERSTORMS ALONG THE FRONT TO CONTINUE AND INCREASE IN
     INTENSITY. WHILE WINDS ALOFT ARE NOT ESPECIALLY STRONG...THE
     MAGNITUDE OF THE INSTABILITY WILL LIKELY COMPENSATE AND ALLOW
     FOR SOME OF THE STORMS TO BECOME SEVERE WITH LARGE HAIL AND
     DAMAGING WINDS. THE VERY MOIST ENVIRONMENT WILL ALSO ALLOW
     THE STORMS TO PRODUCE EXTREMELY HEAVY DOWNPOURS...WHICH COULD
     RESULT IN LOCALIZED FLASH FLOODING.

PORTIONS OF THE KANKAKEE AND ILLINOIS RIVERS WILL REMAIN IN
FLOOD.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THERE WILL BE A CHANCE OF THUNDERSTORMS FROM SUNDAY THROUGH
MONDAY NIGHT AND AGAIN WEDNESDAY NIGHT THROUGH FRIDAY. SOME OF
THESE THUNDERSTORMS MAY PRODUCE LOCALLY HEAVY RAINFALL.

PORTIONS OF THE KANKAKEE AND ILLINOIS RIVERS WILL REMAIN IN
FLOOD.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE NEEDED THIS AFTERNOON.

&&

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

LMZ740>745-052000-
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-
246 PM CDT SAT JUN 4 2011

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THERE IS A CHANCE OF THUNDERSTORMS TODAY. SOME OF THESE STORMS
MAY PRODUCE WIND GUSTS ABOVE 34 KNOTS AND PENNY SIZE HAIL OR
LARGER.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THERE IS A CHANCE OF THUNDERSTORMS FROM SUNDAY THROUGH MONDAY
NIGHT AND AGAIN WEDNESDAY NIGHT THROUGH FRIDAY.

&&

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-
870-872-874-876-878-052000-
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-
246 PM CDT SAT JUN 4 2011

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THERE IS A CHANCE OF THUNDERSTORMS TODAY ACROSS SOUTHERN LAKE
MICHIGAN. SOME OF THESE STORMS MAY PRODUCE WIND GUSTS ABOVE 34
KNOTS AND PENNY SIZE HAIL OR LARGER.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THERE IS A CHANCE OF THUNDERSTORMS FROM SUNDAY THROUGH MONDAY
NIGHT AND AGAIN WEDNESDAY NIGHT THROUGH FRIDAY.

&&

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

IZZI

In the hours before

Local storm report, Jun 4, 7:25 PM CDT, 1 hour 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
ISSUED BY NATIONAL WEATHER SERVICE LINCOLN IL
725 PM CDT SAT JUN 04 2011

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

0445 PM     TSTM WND DMG     LOWELL                  41.29N 87.41W
06/04/2011                   LAKE               IN   BROADCAST MEDIA

            MAN TREES AND POWER LINES DOWN DOWN ACROSS THE SOUTHERN
            PORTION OF THE COUNTY.

&&

GEELHART
Local storm report, Jun 4, 7:34 PM CDT, 57 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
ISSUED BY NATIONAL WEATHER SERVICE LINCOLN IL
734 PM CDT SAT JUN 04 2011

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

0355 PM     TSTM WND DMG     OAK LAWN                41.72N 87.75W
06/04/2011                   COOK               IL   FIRE DEPT/RESCUE

            APPROXIMATELY 50 TREES DOWN IN AN AREA FROM CENTRAL TO
            PULASKI BETWEEN 95TH AND 109TH STS. MOST CONCENTRATED
            DAMAGE ALONG 107TH ST BETWEEN CICERO AVE AND KOSTNER.
            TIME ESTIMATED

&&

GEELHART
Special weather statement, Jun 4, 7:35 PM CDT, 56 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
ISSUED BY NATIONAL WEATHER SERVICE LINCOLN IL
735 PM CDT SAT JUN 4 2011

ILZ032-039-050130-
FORD-LIVINGSTON-
735 PM CDT SAT JUN 4 2011

...SIGNIFICANT WEATHER ALERT FOR FORD AND SOUTHEASTERN LIVINGSTON
COUNTIES UNTIL 830 PM CDT...

AT 734 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 6 MILES SOUTH OF FORREST...OR 7 MILES SOUTHEAST
OF FAIRBURY...MOVING SOUTHEAST AT 25 MPH.

PENNY SIZE HAIL...AND WINDS AROUND 50 MPH ARE EXPECTED WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
  GIBSON CITY...
  PAXTON...

OTHER LOCATIONS AFFECTED INCLUDE...STRAWN...SIBLEY...MELVIN...ROBERTS
AND ELLIOTT.

PEOPLE NEAR THESE LOCATIONS SHOULD MONITOR THE WEATHER SITUATION
CLOSELY. LISTEN FOR POSSIBLE WARNINGS...AND BE PREPARED TO TAKE
APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN.

LAT...LON 4040 8847 4061 8847 4061 8858 4067 8858
      4078 8843 4059 8812 4049 8812 4049 8795
      4047 8793 4041 8793
TIME...MOT...LOC 0035Z 308DEG 23KT 4066 8843
Local storm report, Jun 4, 8:04 PM CDT, 27 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
ISSUED BY NATIONAL WEATHER SERVICE LINCOLN IL
804 PM CDT SAT JUN 04 2011

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

0313 PM     TSTM WND GST     1 NW SUGAR GROVE        41.78N 88.47W
06/04/2011  M54.00 MPH       KANE               IL   ASOS

0324 PM     HAIL             2 NW MELROSE PARK       41.92N 87.89W
06/04/2011  M0.25 INCH       COOK               IL   COCORAHS

0326 PM     HAIL             2 NW SUGAR GROVE        41.79N 88.49W
06/04/2011  M1.00 INCH       KANE               IL   TRAINED SPOTTER

0326 PM     HAIL             OSWEGO                  41.70N 88.33W
06/04/2011  M0.50 INCH       KENDALL            IL   AMATEUR RADIO

0329 PM     HAIL             OSWEGO                  41.70N 88.33W
06/04/2011  M1.00 INCH       KENDALL            IL   EMERGENCY MNGR

            COLLINS AND GROVE STREETS

0329 PM     HAIL             1 S OSWEGO              41.68N 88.33W
06/04/2011  M0.50 INCH       KENDALL            IL   TRAINED SPOTTER

0329 PM     HAIL             MELROSE PARK            41.90N 87.86W
06/04/2011  M0.88 INCH       COOK               IL   EMERGENCY MNGR

0330 PM     HEAVY RAIN       1 NE SUGAR GROVE        41.78N 88.45W
06/04/2011  M0.72 INCH       KANE               IL   COCORAHS

            IN 30 MINUTES

0330 PM     HAIL             1 NW PLAINFIELD         41.63N 88.22W
06/04/2011  E0.75 INCH       WILL               IL   COCORAHS

            1/2 TO 3/4 INCH HAIL. MINOR LEAF DAMAGE NOTED.

0339 PM     HAIL             1 NNE BLOOMINGDALE      41.96N 88.08W
06/04/2011  M0.25 INCH       DUPAGE             IL   COCORAHS

0341 PM     HAIL             SSE PLAINFIELD          41.62N 88.20W
06/04/2011  M0.75 INCH       WILL               IL   COCORAHS

0342 PM     HAIL             PLAINFIELD              41.62N 88.20W
06/04/2011  M0.75 INCH       WILL               IL   TRAINED SPOTTER

            RT 59 AND 135TH ST

0343 PM     HAIL             PLAINFIELD              41.62N 88.20W
06/04/2011  M1.75 INCH       WILL               IL   TRAINED SPOTTER

            135TH AND ROUTE 30

0343 PM     HAIL             PLAINFIELD              41.62N 88.20W
06/04/2011  M0.50 INCH       WILL               IL   TRAINED SPOTTER

            RT 30 AND 119TH

0345 PM     HAIL             1 W PLAINFIELD          41.62N 88.22W
06/04/2011  M1.75 INCH       WILL               IL   TRAINED SPOTTER

0347 PM     HAIL             NORTH RIVERSIDE         41.85N 87.82W
06/04/2011  M0.75 INCH       COOK               IL   TRAINED SPOTTER

0347 PM     HAIL             SUMMIT                  41.78N 87.82W
06/04/2011  E0.75 INCH       COOK               IL   AMATEUR RADIO

            I-55 AND HARLEM AVE

0347 PM     HAIL             PLAINFIELD              41.62N 88.20W
06/04/2011  M0.25 INCH       WILL               IL   TRAINED SPOTTER

            135TH STREET

0351 PM     HAIL             PLAINFIELD              41.62N 88.20W
06/04/2011  M1.00 INCH       WILL               IL   AMATEUR RADIO

            ROUTE 30 AND RENWICK

0352 PM     HAIL             ROMEOVILLE              41.65N 88.09W
06/04/2011  M1.00 INCH       WILL               IL   OFFICIAL NWS OBS

            AT NWS OFFICE

0355 PM     TSTM WND DMG     OAK LAWN                41.72N 87.75W
06/04/2011                   COOK               IL   FIRE DEPT/RESCUE

            APPROXIMATELY 50 TREES DOWN IN AN AREA FROM CENTRAL TO
            PULASKI BETWEEN 95TH AND 109TH STS. MOST CONCENTRATED
            DAMAGE ALONG 107TH ST BETWEEN CICERO AVE AND KOSTNER.
            TIME ESTIMATED

0355 PM     HAIL             NEW LENOX               41.52N 87.98W
06/04/2011  E0.50 INCH       WILL               IL   TRAINED SPOTTER

            1/4 TO 1/2 INCH HAIL AT RT 66 RACEWAY.

0355 PM     HAIL             CHICAGO                 41.88N 87.63W
06/04/2011  M0.25 INCH       COOK               IL   TRAINED SPOTTER

            UIC

0400 PM     TSTM WND DMG     1 SSE BURBANK           41.73N 87.76W
06/04/2011                   COOK               IL   TRAINED SPOTTER

            DELAYED REPORT. SIGNIFICANT TREE DAMAGE. 2 TO 3 FOOT
            TREES UPROOTED AND DOWNED...SOME ON HOUSES. MINOR SIGN
            DAMAGE TO A BUSINESS ON 95TH ST. TIME ESTIMATED.

0400 PM     TSTM WND GST     SSW OAK LAWN            41.72N 87.75W
06/04/2011  E71.00 MPH       COOK               IL   COCORAHS

            71 MPH GUST. 1/4 TO 1/2 INCH DIAMETER BRANCHES DOWN.
            BRIEF PEA SIZED HAIL.

0400 PM     HAIL             JOLIET                  41.53N 88.12W
06/04/2011  M1.00 INCH       WILL               IL   PUBLIC

            THEODORE AND ESSINGTON

0401 PM     TSTM WND DMG     OAK LAWN                41.72N 87.75W
06/04/2011                   COOK               IL   TRAINED SPOTTER

            80 MPH GUST. LOTS OF DEBRIS.

0402 PM     TSTM WND GST     OAK LAWN                41.72N 87.75W
06/04/2011  E70.00 MPH       COOK               IL   TRAINED SPOTTER

            70 MPH ESTIMATED WIND GUST

0408 PM     NON-TSTM WND DMG OAK LAWN                41.72N 87.75W
06/04/2011                   COOK               IL   TRAINED SPOTTER

            106TH AND CICERO. 2 TO 4 INCH LIMBS BROKEN.

0412 PM     TSTM WND GST     FRANKFORT               41.50N 87.84W
06/04/2011  E50.00 MPH       WILL               IL   AMATEUR RADIO

            US 30 AND US 45

0412 PM     HAIL             MANHATTAN               41.43N 87.99W
06/04/2011  M1.25 INCH       WILL               IL   AMATEUR RADIO

            RT 52 AND WHITE FEATHER DRIVE

0415 PM     HAIL             TINLEY PARK             41.57N 87.80W
06/04/2011  E1.75 INCH       COOK               IL   TRAINED SPOTTER

0415 PM     TSTM WND DMG     ST. JOHN                41.45N 87.48W
06/04/2011                   LAKE               IN   BROADCAST MEDIA

            SEMI BLOWN OVER. TIME ESTIMATED

0416 PM     HAIL             MANHATTAN               41.43N 87.99W
06/04/2011  E1.75 INCH       WILL               IL   CO-OP OBSERVER

            GOLF BALL SIZED HAIL

0417 PM     HAIL             MANHATTAN               41.43N 87.99W
06/04/2011  M0.75 INCH       WILL               IL   AMATEUR RADIO

            CEDAR AND MONEE ROADS

0421 PM     FLOOD            TINLEY PARK             41.57N 87.80W
06/04/2011                   COOK               IL   AMATEUR RADIO

            US 30 AND HARLEM. STANDING WATER ON EAST BOUND LANES OF
            US 30.

0421 PM     HAIL             TINLEY PARK             41.57N 87.80W
06/04/2011  M1.00 INCH       COOK               IL   AMATEUR RADIO

            US 30 AND HARLEM

0425 PM     TSTM WND DMG     ST. JOHN                41.45N 87.48W
06/04/2011                   LAKE               IN   TRAINED SPOTTER

            2 TO 3 FOOT DIAMETER TREES DOWNED. PINE TREES TOP TAKEN
            OFF.

0428 PM     HAIL             RICHTON PARK            41.48N 87.73W
06/04/2011  E0.50 INCH       COOK               IL   LAW ENFORCEMENT

            1/4 TO 1/2 INCH HAIL REPORTED BY RICHTON PARK POLICE
            DEPARTMENT.

0431 PM     HAIL             MONEE                   41.42N 87.75W
06/04/2011  M0.88 INCH       WILL               IL   AMATEUR RADIO

            RIDGELAND AND BRUNS

0435 PM     NON-TSTM WND GST 5 E MANTENO             41.25N 87.74W
06/04/2011  E80.00 MPH       KANKAKEE           IL   TRAINED SPOTTER

            ESTIMATED 80 MPH WIND GUST. TREE LIMB DAMAGE OF UNKNOWN
            SIZE.

0437 PM     TSTM WND GST     LOWELL                  41.29N 87.41W
06/04/2011  E70.00 MPH       LAKE               IN   AMATEUR RADIO

            70 MPH GUST ESTIMATE AT 181ST AND WHITE OAK. WITH PEA
            SIZE HAIL.

0438 PM     HAIL             BEECHER                 41.35N 87.61W
06/04/2011  M1.00 INCH       WILL               IL   AMATEUR RADIO

            KENTUCKY AND STATELINE ROAD

0440 PM     TSTM WND GST     MANTENO                 41.25N 87.84W
06/04/2011  M62.00 MPH       KANKAKEE           IL   TRAINED SPOTTER

            RTE 45 AND CNTY RD 9000. 62 MPH MEASURED GUSTS.

0440 PM     HAIL             MANTENO                 41.25N 87.84W
06/04/2011  E1.00 INCH       KANKAKEE           IL   TRAINED SPOTTER

            3/4 TO 1 INCH SIZED HAIL. RTE 45 AND CNTY RD 9000.

0444 PM     TSTM WND GST     LOWELL                  41.29N 87.41W
06/04/2011  M82.00 MPH       LAKE               IN   MESONET

0445 PM     TSTM WND DMG     LOWELL                  41.29N 87.41W
06/04/2011                   LAKE               IN   BROADCAST MEDIA

            MANY TREES AND POWER LINES DOWN DOWN ACROSS THE SOUTHERN
            PORTION OF THE COUNTY.

0450 PM     TSTM WND DMG     CHESTERTON              41.60N 87.06W
06/04/2011                   PORTER             IN   TRAINED SPOTTER

            8 FOOT DIAMETER TREE DOWN. TIME ESTIMATED FROM RADAR
            IMAGERY.

0456 PM     HAIL             GRANT PARK              41.24N 87.64W
06/04/2011  M1.00 INCH       KANKAKEE           IL   AMATEUR RADIO

            RT 17 AND 14500 EAST

0458 PM     TSTM WND DMG     PONTIAC                 40.88N 88.64W
06/04/2011                   LIVINGSTON         IL   EMERGENCY MNGR

            TREE DOWN NEAR INTERSECTION OF I-55 AND STATE ROUTE 116.

0458 PM     TSTM WND DMG     BOURBONNAIS             41.16N 87.88W
06/04/2011                   KANKAKEE           IL   AMATEUR RADIO

            UTILITY POLES SNAPPED AND DOWN AT 4000N AND 7500 EAST.

0505 PM     TSTM WND GST     3 E FOREST CITY         41.19N 87.21W
06/04/2011  E50 MPH          JASPER             IN   TRAINED SPOTTER

            PEA SIZE HAIL AND HEAVY RAIN

0510 PM     TSTM WND DMG     HEBRON                  42.47N 88.43W
06/04/2011                   MCHENRY            IL   TRAINED SPOTTER

            6 INCH DIAMETER TREE BRANCHES DOWN AND TREE BLOCKING LANE
            STATE RD 2.

0510 PM     TSTM WND DMG     WATSEKA                 40.78N 87.73W
06/04/2011                   IROQUOIS           IL   TRAINED SPOTTER

            TREE BRANCHES AND WHOLE TREES DOWN APPROX 2 FT DIAMETER
            BLOCKING STREETS. TIME ESTIMATED.

0511 PM     TSTM WND DMG     LOWELL                  41.29N 87.41W
06/04/2011                   LAKE               IN   AMATEUR RADIO

            40 FT TALL TREE AND BILLBOARD DOWN. US 41 AND RT 2.

0522 PM     TSTM WND DMG     WHEATFIELD              41.19N 87.05W
06/04/2011                   JASPER             IN   BROADCAST MEDIA

            TREES DOWN. TIME ESTIMATED.

0525 PM     TSTM WND DMG     MANTENO                 41.25N 87.84W
06/04/2011                   KANKAKEE           IL   TRAINED SPOTTER

            5 FOOT BY 20 FOOT POOL...HALF FULL...LIFTED UP AND THROWN
            ACROSS THE YARD.

0540 PM     TSTM WND GST     1 NNE ONARGA            40.72N 88.01W
06/04/2011  M70 MPH          IROQUOIS           IL   MESONET

            SCHOOL MESONET SITE

0545 PM     TREE WND DMG     WATSEKA                 40.78N 87.73W
06/04/2011                   IROQUOIS           IL   AMATEUR RADIO

            LARGE TREES DOWN ESTIMATED WIND 60 MPH US 24 AND KAY
            STREET.

0558 PM     HAIL             KENTLAND                40.77N 87.45W
06/04/2011  M0.88 INCH       NEWTON             IN   TRAINED SPOTTER

0616 PM     TSTM WND GST     EARL PARK               40.69N 87.42W
06/04/2011  M78.00 MPH       BENTON             IN   TRAINED SPOTTER

            RELAYED VIA WFO IND

0616 PM     TSTM WND DMG     EARL PARK               40.69N 87.42W
06/04/2011                   BENTON             IN   TRAINED SPOTTER

            SEVERAL TREES DOWN OR UPROOTED, ONE 30 INCH DIAMETER TREE
            SNAPPED OFF 3 FEET FROM THE BASE.

0636 PM     TSTM WND DMG     OXFORD                  40.52N 87.25W
06/04/2011                   BENTON             IN   EMERGENCY MNGR

            NUMEROUS TREES AND POWER LINES DOWN OVER THE SOUTHERN
            PORTION OF THE COUNTY.

&&

GEELHART
Local storm report, Jun 4, 8:04 PM CDT, 27 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
ISSUED BY NATIONAL WEATHER SERVICE LINCOLN IL
804 PM CDT SAT JUN 04 2011

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

0313 PM     TSTM WND GST     1 NW SUGAR GROVE        41.78N 88.47W
06/04/2011  M54.00 MPH       KANE               IL   ASOS

0324 PM     HAIL             2 NW MELROSE PARK       41.92N 87.89W
06/04/2011  M0.25 INCH       COOK               IL   COCORAHS

0326 PM     HAIL             2 NW SUGAR GROVE        41.79N 88.49W
06/04/2011  M1.00 INCH       KANE               IL   TRAINED SPOTTER

0326 PM     HAIL             OSWEGO                  41.70N 88.33W
06/04/2011  M0.50 INCH       KENDALL            IL   AMATEUR RADIO

0329 PM     HAIL             OSWEGO                  41.70N 88.33W
06/04/2011  M1.00 INCH       KENDALL            IL   EMERGENCY MNGR

            COLLINS AND GROVE STREETS

0329 PM     HAIL             1 S OSWEGO              41.68N 88.33W
06/04/2011  M0.50 INCH       KENDALL            IL   TRAINED SPOTTER

0329 PM     HAIL             MELROSE PARK            41.90N 87.86W
06/04/2011  M0.88 INCH       COOK               IL   EMERGENCY MNGR

0330 PM     HEAVY RAIN       1 NE SUGAR GROVE        41.78N 88.45W
06/04/2011  M0.72 INCH       KANE               IL   COCORAHS

            IN 30 MINUTES

0330 PM     HAIL             1 NW PLAINFIELD         41.63N 88.22W
06/04/2011  E0.75 INCH       WILL               IL   COCORAHS

            1/2 TO 3/4 INCH HAIL. MINOR LEAF DAMAGE NOTED.

0339 PM     HAIL             1 NNE BLOOMINGDALE      41.96N 88.08W
06/04/2011  M0.25 INCH       DUPAGE             IL   COCORAHS

0341 PM     HAIL             SSE PLAINFIELD          41.62N 88.20W
06/04/2011  M0.75 INCH       WILL               IL   COCORAHS

0342 PM     HAIL             PLAINFIELD              41.62N 88.20W
06/04/2011  M0.75 INCH       WILL               IL   TRAINED SPOTTER

            RT 59 AND 135TH ST

0343 PM     HAIL             PLAINFIELD              41.62N 88.20W
06/04/2011  M1.75 INCH       WILL               IL   TRAINED SPOTTER

            135TH AND ROUTE 30

0343 PM     HAIL             PLAINFIELD              41.62N 88.20W
06/04/2011  M0.50 INCH       WILL               IL   TRAINED SPOTTER

            RT 30 AND 119TH

0345 PM     HAIL             1 W PLAINFIELD          41.62N 88.22W
06/04/2011  M1.75 INCH       WILL               IL   TRAINED SPOTTER

0347 PM     HAIL             NORTH RIVERSIDE         41.85N 87.82W
06/04/2011  M0.75 INCH       COOK               IL   TRAINED SPOTTER

0347 PM     HAIL             SUMMIT                  41.78N 87.82W
06/04/2011  E0.75 INCH       COOK               IL   AMATEUR RADIO

            I-55 AND HARLEM AVE

0347 PM     HAIL             PLAINFIELD              41.62N 88.20W
06/04/2011  M0.25 INCH       WILL               IL   TRAINED SPOTTER

            135TH STREET

0351 PM     HAIL             PLAINFIELD              41.62N 88.20W
06/04/2011  M1.00 INCH       WILL               IL   AMATEUR RADIO

            ROUTE 30 AND RENWICK

0352 PM     HAIL             ROMEOVILLE              41.65N 88.09W
06/04/2011  M1.00 INCH       WILL               IL   OFFICIAL NWS OBS

            AT NWS OFFICE

0355 PM     TSTM WND DMG     OAK LAWN                41.72N 87.75W
06/04/2011                   COOK               IL   FIRE DEPT/RESCUE

            APPROXIMATELY 50 TREES DOWN IN AN AREA FROM CENTRAL TO
            PULASKI BETWEEN 95TH AND 109TH STS. MOST CONCENTRATED
            DAMAGE ALONG 107TH ST BETWEEN CICERO AVE AND KOSTNER.
            TIME ESTIMATED

0355 PM     HAIL             NEW LENOX               41.52N 87.98W
06/04/2011  E0.50 INCH       WILL               IL   TRAINED SPOTTER

            1/4 TO 1/2 INCH HAIL AT RT 66 RACEWAY.

0355 PM     HAIL             CHICAGO                 41.88N 87.63W
06/04/2011  M0.25 INCH       COOK               IL   TRAINED SPOTTER

            UIC

0400 PM     TSTM WND DMG     1 SSE BURBANK           41.73N 87.76W
06/04/2011                   COOK               IL   TRAINED SPOTTER

            DELAYED REPORT. SIGNIFICANT TREE DAMAGE. 2 TO 3 FOOT
            TREES UPROOTED AND DOWNED...SOME ON HOUSES. MINOR SIGN
            DAMAGE TO A BUSINESS ON 95TH ST. TIME ESTIMATED.

0400 PM     TSTM WND GST     SSW OAK LAWN            41.72N 87.75W
06/04/2011  E71.00 MPH       COOK               IL   COCORAHS

            71 MPH GUST. 1/4 TO 1/2 INCH DIAMETER BRANCHES DOWN.
            BRIEF PEA SIZED HAIL.

0400 PM     HAIL             JOLIET                  41.53N 88.12W
06/04/2011  M1.00 INCH       WILL               IL   PUBLIC

            THEODORE AND ESSINGTON

0401 PM     TSTM WND DMG     OAK LAWN                41.72N 87.75W
06/04/2011                   COOK               IL   TRAINED SPOTTER

            80 MPH GUST. LOTS OF DEBRIS.

0402 PM     TSTM WND GST     OAK LAWN                41.72N 87.75W
06/04/2011  E70.00 MPH       COOK               IL   TRAINED SPOTTER

            70 MPH ESTIMATED WIND GUST

0408 PM     NON-TSTM WND DMG OAK LAWN                41.72N 87.75W
06/04/2011                   COOK               IL   TRAINED SPOTTER

            106TH AND CICERO. 2 TO 4 INCH LIMBS BROKEN.

0412 PM     TSTM WND GST     FRANKFORT               41.50N 87.84W
06/04/2011  E50.00 MPH       WILL               IL   AMATEUR RADIO

            US 30 AND US 45

0412 PM     HAIL             MANHATTAN               41.43N 87.99W
06/04/2011  M1.25 INCH       WILL               IL   AMATEUR RADIO

            RT 52 AND WHITE FEATHER DRIVE

0415 PM     HAIL             TINLEY PARK             41.57N 87.80W
06/04/2011  E1.75 INCH       COOK               IL   TRAINED SPOTTER

0415 PM     TSTM WND DMG     ST. JOHN                41.45N 87.48W
06/04/2011                   LAKE               IN   BROADCAST MEDIA

            SEMI BLOWN OVER. TIME ESTIMATED

0416 PM     HAIL             MANHATTAN               41.43N 87.99W
06/04/2011  E1.75 INCH       WILL               IL   CO-OP OBSERVER

            GOLF BALL SIZED HAIL

0417 PM     HAIL             MANHATTAN               41.43N 87.99W
06/04/2011  M0.75 INCH       WILL               IL   AMATEUR RADIO

            CEDAR AND MONEE ROADS

0421 PM     FLOOD            TINLEY PARK             41.57N 87.80W
06/04/2011                   COOK               IL   AMATEUR RADIO

            US 30 AND HARLEM. STANDING WATER ON EAST BOUND LANES OF
            US 30.

0421 PM     HAIL             TINLEY PARK             41.57N 87.80W
06/04/2011  M1.00 INCH       COOK               IL   AMATEUR RADIO

            US 30 AND HARLEM

0425 PM     TSTM WND DMG     ST. JOHN                41.45N 87.48W
06/04/2011                   LAKE               IN   TRAINED SPOTTER

            2 TO 3 FOOT DIAMETER TREES DOWNED. PINE TREES TOP TAKEN
            OFF.

0428 PM     HAIL             RICHTON PARK            41.48N 87.73W
06/04/2011  E0.50 INCH       COOK               IL   LAW ENFORCEMENT

            1/4 TO 1/2 INCH HAIL REPORTED BY RICHTON PARK POLICE
            DEPARTMENT.

0431 PM     HAIL             MONEE                   41.42N 87.75W
06/04/2011  M0.88 INCH       WILL               IL   AMATEUR RADIO

            RIDGELAND AND BRUNS

0435 PM     NON-TSTM WND GST 5 E MANTENO             41.25N 87.74W
06/04/2011  E80.00 MPH       KANKAKEE           IL   TRAINED SPOTTER

            ESTIMATED 80 MPH WIND GUST. TREE LIMB DAMAGE OF UNKNOWN
            SIZE.

0437 PM     TSTM WND GST     LOWELL                  41.29N 87.41W
06/04/2011  E70.00 MPH       LAKE               IN   AMATEUR RADIO

            70 MPH GUST ESTIMATE AT 181ST AND WHITE OAK. WITH PEA
            SIZE HAIL.

0438 PM     HAIL             BEECHER                 41.35N 87.61W
06/04/2011  M1.00 INCH       WILL               IL   AMATEUR RADIO

            KENTUCKY AND STATELINE ROAD

0440 PM     TSTM WND GST     MANTENO                 41.25N 87.84W
06/04/2011  M62.00 MPH       KANKAKEE           IL   TRAINED SPOTTER

            RTE 45 AND CNTY RD 9000. 62 MPH MEASURED GUSTS.

0440 PM     HAIL             MANTENO                 41.25N 87.84W
06/04/2011  E1.00 INCH       KANKAKEE           IL   TRAINED SPOTTER

            3/4 TO 1 INCH SIZED HAIL. RTE 45 AND CNTY RD 9000.

0444 PM     TSTM WND GST     LOWELL                  41.29N 87.41W
06/04/2011  M82.00 MPH       LAKE               IN   MESONET

0445 PM     TSTM WND DMG     LOWELL                  41.29N 87.41W
06/04/2011                   LAKE               IN   BROADCAST MEDIA

            MANY TREES AND POWER LINES DOWN DOWN ACROSS THE SOUTHERN
            PORTION OF THE COUNTY.

0450 PM     TSTM WND DMG     CHESTERTON              41.60N 87.06W
06/04/2011                   PORTER             IN   TRAINED SPOTTER

            8 FOOT DIAMETER TREE DOWN. TIME ESTIMATED FROM RADAR
            IMAGERY.

0456 PM     HAIL             GRANT PARK              41.24N 87.64W
06/04/2011  M1.00 INCH       KANKAKEE           IL   AMATEUR RADIO

            RT 17 AND 14500 EAST

0458 PM     TSTM WND DMG     PONTIAC                 40.88N 88.64W
06/04/2011                   LIVINGSTON         IL   EMERGENCY MNGR

            TREE DOWN NEAR INTERSECTION OF I-55 AND STATE ROUTE 116.

0458 PM     TSTM WND DMG     BOURBONNAIS             41.16N 87.88W
06/04/2011                   KANKAKEE           IL   AMATEUR RADIO

            UTILITY POLES SNAPPED AND DOWN AT 4000N AND 7500 EAST.

0505 PM     TSTM WND GST     3 E FOREST CITY         41.19N 87.21W
06/04/2011  E50 MPH          JASPER             IN   TRAINED SPOTTER

            PEA SIZE HAIL AND HEAVY RAIN

0510 PM     TSTM WND DMG     HEBRON                  42.47N 88.43W
06/04/2011                   MCHENRY            IL   TRAINED SPOTTER

            6 INCH DIAMETER TREE BRANCHES DOWN AND TREE BLOCKING LANE
            STATE RD 2.

0510 PM     TSTM WND DMG     WATSEKA                 40.78N 87.73W
06/04/2011                   IROQUOIS           IL   TRAINED SPOTTER

            TREE BRANCHES AND WHOLE TREES DOWN APPROX 2 FT DIAMETER
            BLOCKING STREETS. TIME ESTIMATED.

0511 PM     TSTM WND DMG     LOWELL                  41.29N 87.41W
06/04/2011                   LAKE               IN   AMATEUR RADIO

            40 FT TALL TREE AND BILLBOARD DOWN. US 41 AND RT 2.

0522 PM     TSTM WND DMG     WHEATFIELD              41.19N 87.05W
06/04/2011                   JASPER             IN   BROADCAST MEDIA

            TREES DOWN. TIME ESTIMATED.

0525 PM     TSTM WND DMG     MANTENO                 41.25N 87.84W
06/04/2011                   KANKAKEE           IL   TRAINED SPOTTER

            5 FOOT BY 20 FOOT POOL...HALF FULL...LIFTED UP AND THROWN
            ACROSS THE YARD.

0540 PM     TSTM WND GST     1 NNE ONARGA            40.72N 88.01W
06/04/2011  M70 MPH          IROQUOIS           IL   MESONET

            SCHOOL MESONET SITE

0545 PM     TSTM WND DMG     WATSEKA                 40.78N 87.73W
06/04/2011                   IROQUOIS           IL   AMATEUR RADIO

            LARGE TREES DOWN ESTIMATED WIND 60 MPH US 24 AND KAY
            STREET.

0558 PM     HAIL             KENTLAND                40.77N 87.45W
06/04/2011  M0.88 INCH       NEWTON             IN   TRAINED SPOTTER

0616 PM     TSTM WND GST     EARL PARK               40.69N 87.42W
06/04/2011  M78.00 MPH       BENTON             IN   TRAINED SPOTTER

            RELAYED VIA WFO IND

0616 PM     TSTM WND DMG     EARL PARK               40.69N 87.42W
06/04/2011                   BENTON             IN   TRAINED SPOTTER

            SEVERAL TREES DOWN OR UPROOTED, ONE 30 INCH DIAMETER TREE
            SNAPPED OFF 3 FEET FROM THE BASE.

0636 PM     TSTM WND DMG     OXFORD                  40.52N 87.25W
06/04/2011                   BENTON             IN   EMERGENCY MNGR

            NUMEROUS TREES AND POWER LINES DOWN OVER THE SOUTHERN
            PORTION OF THE COUNTY.

&&

GEELHART
Local storm report, Jun 4, 8:30 PM CDT, 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
ISSUED BY NATIONAL WEATHER SERVICE LINCOLN IL
830 PM CDT SAT JUN 04 2011

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

0815 PM     TSTM WND DMG     4 W MELVIN              40.57N 88.32W
06/04/2011                   FORD               IL   LAW ENFORCEMENT

            5 POWER POLES DOWN. REPORTED BY FORD COUNTY SHERIFF.

&&

GEELHART

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 4, 7:35 PM CDTSpecial Weather StatementLOTFord55 min
Jun 4, 7:42 PM CDTSevere Thunderstorm WarningLOTFord, Iroquois, Livingston48 min
Jun 4, 8:22 PM CDTAreal Flood AdvisoryLOTFord, Iroquois6 hr
Jun 5, 8:37 AM CDTRiver Flood AdvisoryLOTKankakee12 hr

Nearby

Severe Thunderstorm Warnings in Illinois, 2011Every 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.