Recap of the Derecho on June 24th

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Synopsis

   A long-lived complex of wind producing storms known as a derecho moved across central and eastern Iowa, northern Illinois, and northern Indiana on June 24th. This lasted over 250 miles (and over six hours) and had a consistent swath of severe winds (58+ mph), qualifying it as a derecho.  The initial driving force behind this complex was a subtle low pressure at around 15,000 ft in the atmosphere, and a sharp increase in westerly wind speeds at that level.  This helped trigger the first storms along a surface stationary front.  Robust instability from moisture and warmth built ahead of the initial storms in Iowa during the afternoon to help fuel them, as well as enhance the low-level wind threat.  As the storms congealed and became more organized the atmosphere was favorable for them to drive themselves, and basically create their own local environment.  That is they created a large cold pool of rain-cooled air under the storms, and this dense cooler air propagated with the storms aiding the strong winds.  There were further enhanced by a classic rear-inlow jet, which basically helped those stronger winds at 10-15,000 ft mentioned earlier to work their way near the surface. 

Early Afternoon-Mid Evening Infrared Satellite Loop & 5 Minute Lightning Data

Infrared Satellite Loop

Click for loop (~ 11 MB)


Radar

  Below is a radar loop of the MCS through the area.  The radar signatures are all ideal for strong winds, especially along and near the apex of the bow.  The reflectivity gradient at the front is very sharp and quickly moving, all indicative of strong winds and sustainability.  Note also little "hooks" on the front edge indicative of meso-vorticies, where brief tornadoes or at least enhanced winds were more favored.  On the back side of the complex, you'll note a backwards "C-shaped" drying of reflectivity, indicative of a rear-inflow jet, a feature that can enhance the low-level winds and help sustain them for a longer period of time.

NWS Chicago 0.5° Reflectivity Radar Loop:  Early Afternoon-Mid Eve

Radar Loop

Click for high res loop (~ 13 MB)   |  Click here for lower res (~4 MB)

NWS Chicago 0.5° System-Relative Reflectivity Radar Loop:  Early Afternoon-Mid Eve 

Radar Loop

Click for high res loop (~ 11 MB)   |  Click here for lower res (~3 MB)

NWS Chicago 0.5° Reflectivity:  5:00 pm

NWS Chicago 0.5° Velocity:  5:00 pm

Reflectivity Reflectivity

Radar Mosaic of Rotational Velocity Tracks

Rotational Velocity Tracks

This graphic is dervied from the Doppler radar indicated rotation. Note the two long-lived rotation areas from south of the Quad Cities across north central Illinois. These rotational areas were rarely very strong, and were not in the most favored environments for tornadoes. Where these increased in intensity (pinks and white colors) is where there existed greater concern for possible tornadoes.


Damage Survey Info

...LEE COUNTY ILLINOIS DAMAGE SURVEY RESULTS...

NATIONAL WEATHER SERVICE PERSONNEL SURVEYED DAMAGE FROM THE STORMS
ON JUNE 24TH IN WESTERN AND CENTRAL LEE COUNTY IN NORTHERN ILLINOIS.
CONCENTRATED HIGHER END STRAIGHT-LINE WIND DAMAGE OCCURRED IN A
SWATH ACROSS THIS AREA...ALONG WITH A BRIEF TORNADO TO THE IMMEDIATE
NORTH OF THAT AREA.

LOOKING FIRST AT THE TORNADO:

* MAXIMUM EF-SCALE RATING: EF-0

* FATALITIES:  NONE

* INJURIES:    NONE

* BEGIN TIME/LOCATION:  06/24/2013...432 PM CDT /ESTIMATED/
                        2S OF HARMON IL
                        LAT 41.6995  LONG -89.5562

* END TIME/LOCATION:    06/24/2013...436 PM CDT /ESTIMATED/
                        2.5 ENE OF HARMON IL
                        LAT 41.7261  LONG -89.5154

* MAXIMUM ESTIMATED WIND SPEED:  85 MPH

* PATH LENGTH:                   4 MILES

* MAXIMUM PATH WIDTH:            100 YARDS

* DISCUSSION/DAMAGE:

THIS PATH WAS MAINLY OVER FARM FIELDS BUT DID TAKE DOWN NUMEROUS
UTILITY POLES...INCLUDING A FEW THAT WERE BENT SHARPLY TO THE
SOUTH...OPPOSITE OF THE STORM MOTION WHICH WAS NORTHEAST. THESE
ALIGNED WITH THE NORTH PART OF THE DAMAGE SWATH. ONE WEAKLY
CONSTRUCTED BARN WAS DESTROYED NEAR THE END OF THIS PATH. DAMAGE TO
THE CORN CANOPY AT CROSSROADS ALONG THIS PATH REVEALED A MORE
CONVERGENT SIGNATURE INDICATIVE OF A SHORT-LIVED TORNADO.

LOOKING NOW AT THE CONCENTRATED STRAIGHT-LINE WINDS:

* EVENT: STRAIGHT-LINE WINDS

* FATALITIES:  NONE

* INJURIES:    NONE

* BEGIN TIME/LOCATION:  06/24/2013...429 PM CDT /ESTIMATED/
                        7SW OF WALTON IL
                        LAT 41.6690  LONG -89.5390

* END TIME/LOCATION:    06/24/2013...440 PM CDT /ESTIMATED/
                        1NNW OF AMBOY IL
                        LAT 41.7240  LONG -89.3359

* MAXIMUM ESTIMATED WIND SPEED:  100 MPH

* LENGTH OF WIND SWATH:          ROUGHLY 13 MILES

* DISCUSSION/DAMAGE:

THROUGHOUT THIS SWATH INDICATIONS WERE THAT WIND GUSTS WERE IN
EXCESS OF 60 MPH WITH MULTIPLE  LOCATIONS OBSERVING SPEEDS IN EXCESS
OF 80 MPH. AT TIMES DAMAGE WAS SOMEWHAT SPORADIC AND IN ZIG-ZAG TYPE
ORIENTATION...BUT OVERALL THIS WAS A SEMI-CONTINUOUS CORRIDOR ABOUT
ONE TO ONE AND A HALF MILES IN WIDTH. DEBRIS AND FALLEN TREE
PLACEMENT TO THE NORTHEAST...ALL CORN FLATTENING OR BENDING TO THE
NORTHEAST...AND MOST EYE-WITNESS REPORTS INDICATE THIS WAS FROM
STRAIGHT-LINE WINDS.

NEAR THE BEGINNING OF THIS ENHANCED WIND AREA...A LARGE OUTBUILDING
WHICH WAS BOLTED TO ITS FOUNDATION WAS DESTROYED WITH SEVERAL LARGE
PIECES BEING LIFTED AND THROWN DOWNSTREAM. ONE PART OF THE BARN WALL
WAS LIFTED UP AND TOOK A PIECE OF THE FOUNDATION WITH IT. SLIGHTLY
DOWNSTREAM A LARGE TREE WAS SNAPPED NEAR ITS BASE AT A PROPERTY WITH
THE TREE FALLING ON THE FRONT PORTION OF THE HOUSE. IN WALTON...FOUR
LARGE GRAIN STORAGE BINS WERE DESTROYED ALONG WITH A METAL
OUTBUILDING. THE DEBRIS FROM THIS WAS FLUNG DOWNSTREAM...INCLUDING A
FEW PIECES BEING IMPALED IN THE REMAINING STANDING PART OF THE
ELEVATOR WHICH WAS ON THE EAST MOST SIDE OF THE PROPERTY. TWO OF
THE BINS WERE BASICALLY FOLDED IN ON EACH OTHER. NEAR THE END OF
THIS SWATH...THERE WERE A HANDFUL OF LARGE TREES SNAPPED WITH
NUMEROUS UPROOTED.

ADDITIONAL INFORMATION ON THE WIND DAMAGE IN THIS AREA WILL BE
PROVIDED AS IT BECOMES AVAILABLE.

THE NATIONAL WEATHER SERVICE WOULD LIKE TO THANK LEE COUNTY
EMERGENCY MANAGEMENT...AMBOY ESDA...AND ROCKFORD MEDIA PARTNERS WHO
ASSISTED WITH PHOTOS AND DETAILED REPORTS OF THE DAMAGE IN ADVANCE.

THIS PRELIMINARY INFORMATION WAS DETERMINED BY NATIONAL WEATHER
SERVICE SURVEY TEAMS AND IS SUBJECT TO CHANGE PENDING FINAL REVIEW
OF THE EVENT AND PUBLICATION IN NATIONAL WEATHER SERVICE STORM DATA.

THIS INFORMATION WILL ALSO BE PROVIDED ON OUR WEBSITE AT
WWW.WEATHER.GOV/CHICAGO. MORE INFORMATION MAY BECOME AVAILABLE AT A
LATER DATE.

FOR REFERENCE...THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES
INTO THE FOLLOWING CATEGORIES:

EF0...WIND SPEEDS 65 TO 85 MPH
EF1...WIND SPEEDS 86 TO 110 MPH
EF2...WIND SPEEDS 111 TO 135 MPH
EF3...WIND SPEEDS 136 TO 165 MPH
EF4...WIND SPEEDS 166 TO 200 MPH
EF5...WIND SPEEDS GREATER THAN 200 MPH

$$

MTF
 
Damage survey for Lee County for 24 June 2013

Wind Damage in Walton

More Wind Damage in Lee County

Barn Damage Due to EF-0 Tornado


Storm Reports

Preliminary storm reports

Nationwide Reports

Nationwide Storm Reports

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
122 PM CDT THU JUN 27 2013

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

0429 PM     TSTM WND DMG     7 SW WALTON             41.64N 89.53W 
06/24/2013                   LEE                IL   NWS STORM SURVEY

            THIS IS FROM THE JUNE 24TH EVENT. THIS WAS THE START OF 
            AN APPROXIMATELY 13 MILE SWATH OF SEVERE WIND DAMAGE TO 
            THE NORTHEAST WHICH ENDED 1NNW OF AMBOY. ESTIMATED WIND 
            SPEEDS AT A HANDFUL OF POINTS WERE IN EXCESS OF 80 MPH 
            AND LIKELY NEAR 100 MPH. DAMAGE INCLUDED DESTRUCTION OF A
            LARGE OUTBUILDING BOLTED TO ITS FOUNDATION...NUMEROUS 
            LARGE TREEDS DOWNED INCLUDING ONE ON THE FRONT PORTION OF
            A HOUSE...AND SHINGLE DAMAGE TO A FEW HOMES.

0432 PM     TORNADO          2 S HARMON              41.69N 89.56W 
06/24/2013                   LEE                IL   NWS STORM SURVEY

            THIS REPORT IS FROM THE JUNE 24TH EVENT. AN NWS STORM 
            SURVEY ASSESSMENT DETERMINED AN EF-0 TORNADO WITH MAXIMUM
            WINDS ESTIMATED NEAR 85 MPH TRACKED FOR FOUR MILES ENDING
            2.5 ENE OF HARMON. MAXIMUM WIDTH WAS ESTIMATED NEAR 100 
            YARDS. DAMAGE INCLUDED SEVERELY BENT UTILITY POLES...A 
            WEAKLY CONSTRUCTED BARN DESTROYED...AND SMASHING OF 
            CROPS. TIME ESTIMATED PER RADAR AND ACCOUNTS FROM PUBLIC 
            OF STRONG WINDS.

0437 PM     TSTM WND GST     WALTON                  41.72N 89.44W 
06/24/2013  E100 MPH         LEE                IL   NWS STORM SURVEY

            THIS IS FROM THE JUNE 24TH EVENT. THIS WIND SPEED WAS 
            ESTIMATED BASED ON DAMAGE...WHICH WAS THE HIGHEST END 
            DAMAGE IN A CONTINUOUS SWATH OF SEVERE WINDS FROM 7SW OF 
            WALTON TO 1NNW OF AMBOY. AN NWS STORM SURVEY ASSESSMENT 
            VERIFIED FOUR LARGE GRAIN STORAGE BINS WERE DESTROYED 
            ALONG WITH A METAL OUTBUILDING WITH DEBRIS THROWN OVER 
            200 YARDS NORTHEAST. A HOME IN WALTON ALSO EXPERIENCED 
            SEVERE ROOF DAMAGE WITH LARGE TREES BEING UPROOTED AND 
            SNAPPED ON ITS PROPERTY.

0440 PM     TSTM WND DMG     SUBLETTE                41.64N 89.23W 
06/24/2013                   LEE                IL   TRAINED SPOTTER 

            4 TO 18 INCH DIAMETER TREE BRANCHES DOWN. POWER LINES 
            DOWN.

0444 PM     TSTM WND GST     MENDOTA                 41.55N 89.12W 
06/24/2013  E85.00 MPH       LA SALLE           IL   NWS STORM SURVEY

            THIS IS FROM THE JUNE 24TH EVENT. WIND SPEED WAS 
            ESTIMATED BASED ON THE DAMAGE. NUMEROUS LARGE TREES AND 
            BRANCHES WERE DOWNED ACROSS TOWN. A FREE STANDING LIGHT 
            POLE WAS DOWNED AT THE HIGH SCHOOL.

0450 PM     TSTM WND DMG     2 NE TROY GROVE         41.49N 89.05W 
06/24/2013                   LA SALLE           IL   TRAINED SPOTTER 

            TREES DOWN NEAR TRIUMPH AND TROY GROVE. TIME ESTIMATED BY
            RADAR.

0500 PM     TSTM WND GST     1 SSW OTTAWA            41.33N 88.85W 
06/24/2013  M62.00 MPH       LA SALLE           IL   MESONET         

            MEASURED AT SITE SRDI2.

0500 PM     TSTM WND DMG     TONICA                  41.21N 89.07W 
06/24/2013                   LA SALLE           IL   PUBLIC          

            SEMI OVERTURNED ON INTERSTATE 39 IN ADDITION TO 
            WIDESPREAD WIND DAMAGE. VIA FACEBOOK. 

0505 PM     TSTM WND DMG     OTTAWA                  41.35N 88.84W 
06/24/2013                   LA SALLE           IL   TRAINED SPOTTER 

            MEDIUM SIZED TREE BRANCH DOWN ON A PHONE LINE ON WEST 
            CENTER STREET. 

0507 PM     TSTM WND DMG     JOLIET                  41.53N 88.12W 
06/24/2013                   WILL               IL   TRAINED SPOTTER 

            WIND DAMAGE AT CRYSTAL LAKES ELEMENTARY SCHOOL. A HUGE 
            PINE TREE WAS UPROOTED AND PART OF IT ENDED ON THE ROOF. 
            THERE WAS SOME DAMAGE TO THE ROOF AND A SECTION OF THE 
            GUTTER. 

0508 PM     TSTM WND DMG     OTTAWA                  41.35N 88.84W 
06/24/2013                   LA SALLE           IL   TRAINED SPOTTER 

            LARGE TREES UPROOTED ON THE SOUTH SIDE OF OTTAWA. 

0509 PM     TSTM WND GST     2 SSE STEWARD           41.83N 89.01W 
06/24/2013  E65.00 MPH       LEE                IL   TRAINED SPOTTER 

            SPOTTER ON I-39 5 MILES NORTH OF HWY 30 HAD ESTIMATED 
            WINDS AT 60 TO 65 MPH. NO DAMAGE SEEN OR VEHICLES OFF THE
            ROAD AT THAT TIME.

0510 PM     TSTM WND GST     DE KALB                 41.93N 88.75W 
06/24/2013  E65.00 MPH       DE KALB            IL   TRAINED SPOTTER 

            ESTIMATED 60 TO 65 MPH WINDS ON FAR WEST SIDE OF DEKALB. 
            SMALL TREE BRANCH DOWN.

0511 PM     TSTM WND DMG     SANDWICH                41.65N 88.62W 
06/24/2013                   DE KALB            IL   LAW ENFORCEMENT 

            SANDWICH POLICE REPORTED NUMEROUS DOWNED TREES AND POWER 
            LINES. ONE TREE FELL ON A VEHICLE BUT THE OCCUPANT WAS 
            NOT HARMED. REPORT CORRECTED FOR EVENT TYPE.

0512 PM     TSTM WND DMG     PERU                    41.34N 89.13W 
06/24/2013                   LA SALLE           IL   AMATEUR RADIO   

            SEMI TRUCK FLIPPED OVER BY WINDS AT INTERSTATE 80 AND 
            MILE MARKER 75.

0515 PM     TSTM WND GST     3 NNE DE KALB           41.97N 88.74W 
06/24/2013  E60.00 MPH       DE KALB            IL   TRAINED SPOTTER 

            WINDS ESTIMATED AT 60 MPH NEAR BETHANY ROAD AND 1ST 
            STREET. SOME SMALL NEWLY PLANTED TREES WERE DOWNED.

0520 PM     TSTM WND GST     SYCAMORE                41.98N 88.70W 
06/24/2013  E60.00 MPH       DE KALB            IL   TRAINED SPOTTER 

            ESTIMATED 50 TO 60 MPH WIND GUSTS. POWERLINES ALSO DOWN 
            IN CITY OF DEKALB. 

0525 PM     TSTM WND GST     ELBURN                  41.89N 88.47W 
06/24/2013  E75.00 MPH       KANE               IL   TRAINED SPOTTER 

            ESTIMATED WIND GUSTS AT WATKINS AT INTERSTATE 88 IN 
            ELBURN.

0530 PM     TSTM WND DMG     AURORA                  41.77N 88.29W 
06/24/2013                   KANE               IL   TRAINED SPOTTER 

            18-24 INCH DIAMETER TREE SNAPPED NEAR BASE AND LEANING ON
            HOUSE. NUMEROUS SMALLER BRANCHES DOWN. WEST SIDE OF 
            AURORA. TIME ESTIMATED.

0530 PM     TSTM WND DMG     MINOOKA                 41.46N 88.26W 
06/24/2013                   GRUNDY             IL   LAW ENFORCEMENT 

            REPORTS OF TWO TRUCKS BLOWN OVER ON I-80 1 MILE EAST OF 
            RIDGE ROAD. ALSO A TREE BLOWN OVER ON A HOUSE IN MINOOKA

0532 PM     TSTM WND GST     MAZON                   41.24N 88.42W 
06/24/2013  E80.00 MPH       GRUNDY             IL   PUBLIC          

            LARGE TREE SNAPPED AT THE BASE

0533 PM     TSTM WND DMG     OSWEGO                  41.70N 88.33W 
06/24/2013                   KENDALL            IL   TRAINED SPOTTER 

            LARGE TREE UPROOTED ON FOX BEND GOLF COURSE OFF OF OGDEN 
            AVENUE. 

0534 PM     TSTM WND DMG     MORRIS                  41.37N 88.43W 
06/24/2013                   GRUNDY             IL   TRAINED SPOTTER 

            2 INCH DIAMETER BRANCHES DOWN. WIND ESTIMATED AT 70 MPH.

0535 PM     TSTM WND DMG     NAPERVILLE              41.76N 88.15W 
06/24/2013                   DUPAGE             IL   EMERGENCY MNGR  

            A ROOF WAS DAMAGED AT 104TH AND PLAINFIELD ROAD.

0535 PM     TSTM WND DMG     NAPERVILLE              41.76N 88.15W 
06/24/2013                   DUPAGE             IL   FIRE DEPT/RESCUE

            STREET BLOCKED BY 6 INCH BRANCHES. CHARLES STREET AND 
            CHICAGO AVENUE. 

0535 PM     TSTM WND DMG     MINOOKA                 41.45N 88.26W 
06/24/2013                   GRUNDY             IL   LAW ENFORCEMENT 

            SEMI ROLLED OVER AT INTERSTATE 80 AND RIDGE ROAD...I-80 
            WESTBOUND.

0537 PM     TSTM WND GST     ELGIN                   42.04N 88.29W 
06/24/2013  E60.00 MPH       KANE               IL   TRAINED SPOTTER 

            HEAVY TREE DAMAGE NEAR COOPER AVENUE. POWER LINES DOWN. 

0539 PM     TSTM WND GST     CORTLAND                41.93N 88.69W 
06/24/2013  M72.00 MPH       DE KALB            IL   PUBLIC          

            VIA FACEBOOK. 

0540 PM     TSTM WND DMG     3 N BOLINGBROOK         41.74N 88.08W 
06/24/2013                   DUPAGE             IL   UNKNOWN         

            MULTIPLE TREE LIMBS SNAPPED VARYING FROM 3 1/2 TO 6 
            INCHES AT ARROWHEAD LANE AND GRAND CANYON DR.

0540 PM     TSTM WND GST     4 E OSWEGO              41.69N 88.25W 
06/24/2013  M66.00 MPH       WILL               IL   MESONET         

0540 PM     TSTM WND GST     BOLINGBROOK             41.70N 88.08W 
06/24/2013  E70.00 MPH       WILL               IL   TRAINED SPOTTER 

            ALSO REPORTED STRONG ROTATION.

0540 PM     TSTM WND GST     ELGIN                   42.04N 88.29W 
06/24/2013  E60.00 MPH       KANE               IL   TRAINED SPOTTER 

            HEAVY TREE DAMAGE NEAR COOPER AVENUE. POWER LINES DOWN. 

0540 PM     TSTM WND DMG     BOLINGBROOK             41.70N 88.08W 
06/24/2013                   WILL               IL   TRAINED SPOTTER 

            5 TO 6 LARGE TREES DOWN 12 TO 13 INCHES IN DIAMETER. 
            SHINGLES PEELED OFF ROOFS OF HOUSES. COLLAPSE OF A 3 
            SEASON ROOM. FENCE DOWN. 1 MILE WEST OF INTERSECTION OF 
            WEBER RD AND BOUGHTON RD. 

0540 PM     TSTM WND DMG     BOLINGBROOK             41.70N 88.08W 
06/24/2013                   WILL               IL   EMERGENCY MNGR  

            LARGE EXIT SIGNS BLOWN OVER ON I-355 AND I-55. 

0541 PM     TSTM WND GST     ROMEOVILLE              41.65N 88.09W 
06/24/2013  M61.00 MPH       WILL               IL   OFFICIAL NWS OBS

            AT NWS CHICAGO. 

0541 PM     TSTM WND DMG     3 N BOLINGBROOK         41.74N 88.08W 
06/24/2013                   DUPAGE             IL   TRAINED SPOTTER 

            NUMEROUS LIMBS ARE DOWN VARYING IN DIAMETER FROM 2 TO 6 
            INCHES ON GRAND CANYON DRIVE.

0542 PM     TSTM WND GST     1 N CAROL STREAM        41.93N 88.13W 
06/24/2013  E65.00 MPH       DUPAGE             IL   TRAINED SPOTTER 

            ESTIMATED 60 TO 65 MPH WINDS FOR ABOUT 5 TO 10 SECONDS 
            DURING PEAK OF STORM. A FEW SMALL BRANCHES DOWN. 

0543 PM     TSTM WND GST     3 W FRANKFORT           41.50N 87.89W 
06/24/2013  M58.00 MPH       WILL               IL   TRAINED SPOTTER 

            MEASURED NEAR WOLF ROAD AND HWY 30 IN MOKENA.

0545 PM     TSTM WND DMG     PLAINFIELD              41.62N 88.20W 
06/24/2013                   WILL               IL   TRAINED SPOTTER 

            SIX INCH DIAMETER TREES SNAPPED AT THE BASE AT 135TH AND 
            VAN DYKE.

0545 PM     TSTM WND GST     NAPERVILLE              41.76N 88.15W 
06/24/2013  E55.00 MPH       DUPAGE             IL   TRAINED SPOTTER 

            NO OBVIOUS WIND DAMAGE VISIBILE. 

0547 PM     TSTM WND GST     INVERNESS               42.12N 88.10W 
06/24/2013  E70.00 MPH       COOK               IL   TRAINED SPOTTER 

0549 PM     TSTM WND GST     5 NW BURR RIDGE         41.79N 88.00W 
06/24/2013  M59.00 MPH       DUPAGE             IL   MESONET         

            MEASURED AT WHITTIER SCHOOL IN DOWNERS GROVE.

0550 PM     TSTM WND DMG     WESTMONT                41.80N 87.97W 
06/24/2013                   DUPAGE             IL   TRAINED SPOTTER 

            12 INCH DIAMETER FRESH TREE SNAPPED AT THE BASE.

0552 PM     TSTM WND DMG     NEW LENOX               41.52N 87.98W 
06/24/2013                   WILL               IL   TRAINED SPOTTER 

            6 INCH DIAMETER TREE BRANCH DOWN. 

0553 PM     TSTM WND GST     4 WSW BROOKFIELD        41.80N 87.93W 
06/24/2013  M61.00 MPH       DUPAGE             IL   MESONET         

            MEASURED AT HINSDALE MIDDLE SCHOOL.

0555 PM     TSTM WND DMG     OAK FOREST              41.61N 87.75W 
06/24/2013                   COOK               IL   TRAINED SPOTTER 

            6 INCH DIAMETER TREE SNAPPED. TIME ESTIMATED.

0555 PM     TSTM WND DMG     NILES                   42.03N 87.81W 
06/24/2013                   COOK               IL   TRAINED SPOTTER 

            A 4 FT DIAMETER TREE WAS SNAPPED AT THE BASE AT GOLF AND 
            WASHINGTON.

0555 PM     TSTM WND GST     3 SW MIDWAY AIRPORT     41.75N 87.79W 
06/24/2013  M60.00 MPH       COOK               IL   CO-OP OBSERVER  

0555 PM     TSTM WND GST     5 WNW BURR RIDGE        41.79N 88.00W 
06/24/2013  E59.00 MPH       DUPAGE             IL   MESONET         

0555 PM     TSTM WND GST     5 SW HOMER GLEN         41.57N 88.01W 
06/24/2013  M65.00 MPH       WILL               IL   MESONET         

            GUST MEASURED BY STATION DW0223.

0555 PM     TSTM WND GST     OAK LAWN                41.72N 87.75W 
06/24/2013  E60.00 MPH       COOK               IL   TRAINED SPOTTER 

            TREE BRANCHES DOWN. 

0600 PM     TSTM WND DMG     PEOTONE                 41.33N 87.80W 
06/24/2013                   WILL               IL   LAW ENFORCEMENT 

            SEMI LIFTED UP...REPORTEDLY 10 FEET IN AIR AND BLOWN OVER
            AT INTERSTATE 57 NORTHBOUND NEAR REST AREA. 

0600 PM     TSTM WND DMG     RIVERSIDE               41.83N 87.82W 
06/24/2013                   COOK               IL   TRAINED SPOTTER 

            EXTENSIVE TREE DAMAGE ALONG THE BNSF RAILROAD AREA BY 2 
            TO 4 BLOCKS. ALSO EXTENSIVE DAMAGE AROUND LAGRANGE AND 
            WESTERN SPRINGS.

0600 PM     TSTM WND GST     MIDWAY AIRPORT          41.78N 87.75W 
06/24/2013  M67.00 MPH       COOK               IL   ASOS            

0600 PM     TSTM WND DMG     PARK RIDGE              42.01N 87.84W 
06/24/2013                   COOK               IL   TRAINED SPOTTER 

            6 INCH TREE BRANCHES BLOCKING ROAD. OAKTON AND ALGONQUIN.


0602 PM     TSTM WND GST     MORTON GROVE            42.04N 87.79W 
06/24/2013  E60.00 MPH       COOK               IL   TRAINED SPOTTER 

            ESTIMATED 50 TO 60MPH.

0603 PM     TSTM WND DMG     LYONS                   41.81N 87.82W 
06/24/2013                   COOK               IL   TRAINED SPOTTER 

            6 INCH DIAMETER TREE BRANCHES BLOWN DOWN AND POWER OUT. 
            55TH AND PLAINFIELD ROAD. 

0603 PM     TSTM WND GST     HOMEWOOD                41.56N 87.66W 
06/24/2013  E70.00 MPH       COOK               IL   TRAINED SPOTTER 

            ESTIMATED CONTINUOUS 60 TO 70 MPH WINDS STARTING AT 6PM. 
            6 INCH TREE LIMB DOWN ON DECK. NUMEROUS TREE LIMBS DOWN 
            AROUND THE AREA. 

0604 PM     TSTM WND DMG     CRETE                   41.45N 87.62W 
06/24/2013                   WILL               IL   EMERGENCY MNGR  

            LARGE TREE FELL ON POWERLINE AT 1473 DOUGLAS LANE AND 
            TREE IS NOW ON FIRE.

0604 PM     TSTM WND GST     4 SSE MATTESON          41.45N 87.72W 
06/24/2013  M65.00 MPH       WILL               IL   MESONET         

0604 PM     TSTM WND DMG     FRANKFORT               41.50N 87.84W 
06/24/2013                   WILL               IL   EMERGENCY MNGR  

            LARGE TREE 8 TO 10 INCHES IN DIAMETER DOWN NEAR SOUTH 
            HARLEM AVENUE AND PRESTWICK. 

0604 PM     TSTM WND GST     WHITING                 41.68N 87.49W 
06/24/2013  E70.00 MPH       LAKE               IN   TRAINED SPOTTER 

            SEVERAL LARGE TREES DOWN AND SECTIONS OF POWER OUTAGES 
            AND LOCALIZED FLOODING. 

0607 PM     TSTM WND GST     BOURBONNAIS             41.16N 87.88W 
06/24/2013  E60.00 MPH       KANKAKEE           IL   TRAINED SPOTTER 

            4.5 INCH DIAMETER TREE LIMB FELL ONTO FENCE. 

0608 PM     TSTM WND GST     CRETE                   41.45N 87.62W 
06/24/2013  M76.00 MPH       WILL               IL   EMERGENCY MNGR  

            WINDS MEASURED BY HANDHELD ANEMOMETER ON TOP OF A 2 STORY
            BUILDING. 2 FOOT DIAMETER TREE SNAPPED OFF 15 FEET UP THE
            TREE. UPDATED REPORT AND CHANGED SOURCE FROM TRAINED 
            SPOTTER TO EMERGENCY MGR.

0610 PM     TSTM WND DMG     HAMMOND                 41.62N 87.49W 
06/24/2013                   LAKE               IN   TRAINED SPOTTER 

            MULTIPLE LARGE TREES DOWN NEAR I80/94 AND US41

0610 PM     TSTM WND DMG     NORTH RIVERSIDE         41.85N 87.82W 
06/24/2013                   COOK               IL   TRAINED SPOTTER 

            DELAYED REPORT. LARGE TREE LIMB 6 INCHES IN DIAMETER DOWN
            ON 2300 BLOCK OF FIRST AVENUE...ROUTE 171. MULTIPLE LANES
            BLOCKED. 

0610 PM     TSTM WND DMG     BURR RIDGE              41.75N 87.92W 
06/24/2013                   COOK               IL   BROADCAST MEDIA 

            DELAYED REPORT. LARGE TREES DOWN AND POWER OUT NEAR ROUTE
            83 AND INTERSTATE 55 BETWEEN BURR RIDGE AND DARIEN. 

0610 PM     TSTM WND DMG     BOLINGBROOK             41.70N 88.08W 
06/24/2013                   WILL               IL   TRAINED SPOTTER 

            BRIAR BROOK AND PINE CREST. 2 FOOT TREE DOWN.

0613 PM     TSTM WND DMG     HIGHLAND                41.55N 87.46W 
06/24/2013                   LAKE               IN   TRAINED SPOTTER 

            16 INCH DIAMETER TREE DOWN ON A HOUSE. MANY OTHER 
            BRANCHES DOWN AT DULUTH AND NORTHWOOD. 

0614 PM     TSTM WND DMG     DARIEN                  41.75N 87.98W 
06/24/2013                   DUPAGE             IL   TRAINED SPOTTER 

            14 INCH DIAMETER TREEE IS DOWN AT MIDWAY AND 79TH STREET 
            JUST NORTH OF I-55.

0614 PM     TSTM WND GST     KANKAKEE                41.12N 87.86W 
06/24/2013  E60.00 MPH       KANKAKEE           IL   TRAINED SPOTTER 

            DELAYED REPORT. AT ROUTE 113 AND TOWER ROAD...LARGE TREE 
            LIMBS ON POWER LINES. POWERLINES DOWN ACROSS TOWER RD 
            STARTED SMALL GRASS FIRE. 

0614 PM     TSTM WND GST     GRIFFITH                41.52N 87.42W 
06/24/2013  E70.00 MPH       LAKE               IN   PUBLIC          

            70-80 MPH WINDS ESTIMATED. LOTS OF TREE DAMAGE AND POWER 
            LINES ARE DOWN AT RIDGE RD AND CLINE AVE. VIA SOCIAL 
            MEDIA.

0615 PM     TSTM WND GST     1 S CHICAGO             41.87N 87.63W 
06/24/2013  E65.00 MPH       COOK               IL   TRAINED SPOTTER 

            STRONGEST WINDS LASTED ABOUT 30 SECONDS...KNOCKED OVER 
            TRASH CANS AND BROKE LIMBS OFF TREES. STORM

0615 PM     TSTM WND DMG     CHICAGO                 41.88N 87.63W 
06/24/2013                   COOK               IL   TRAINED SPOTTER 

            MULTIPLE TREE LIMBS DOWN VARYING FROM 17 TO 5 INCHES IN 
            DIAMETER AROUND THE 6100 BLOCK OF NORTH CAMPBELL. 

0618 PM     TSTM WND GST     GRIFFITH                41.52N 87.42W 
06/24/2013  E66.00 MPH       LAKE               IN   TRAINED SPOTTER 

            LARGE TREE ON HOUSE AT 1100 BLOCK NORTH ARBOGAST AND EAST
            43RD STREET...SOUTHEAST CORNER. VARIOUS LARGE BRANCHES 
            DOWN AND WIDESPREAD POWER OUTAGES. 

0618 PM     TSTM WND DMG     SHOREWOOD               41.52N 88.20W 
06/24/2013                   WILL               IL   PUBLIC          

            POWERLINES DOWN AND SMALL AND MEDIUM SIZED TREES SNAPPED 
            IN HALF. HOUBOLT ROAD AND JOLIET ROAD. VIA FACEBOOK. 

0618 PM     TSTM WND GST     GARY                    41.60N 87.34W 
06/24/2013  E70.00 MPH       LAKE               IN   PUBLIC          

            MANY TREE LIMBS DOWN ON UTAH STREET IN GARY. SOME LARGE 
            BRANCHES DOWN. 

0620 PM     TSTM WND GST     2 SW LOWELL             41.27N 87.44W 
06/24/2013  M58.00 MPH       LAKE               IN   MESONET         

0620 PM     TSTM WND GST     GRIFFITH                41.52N 87.42W 
06/24/2013  M80.00 MPH       LAKE               IN   TRAINED SPOTTER 

            RIDGE ROAD AND CLINE AVENUNE. CONTINUOUS 70 TO 80 MPH 
            WINDS FOR A FEW MINUTES. LOTS OF TREE DAMAGE. HIGH 
            TENSION LINES BEING TAKEN DOWN.

0620 PM     TSTM WND GST     GARY                    41.60N 87.34W 
06/24/2013  M72.00 MPH       LAKE               IN   AWOS            

0626 PM     TSTM WND DMG     2 E GARY                41.60N 87.31W 
06/24/2013                   LAKE               IN   TRAINED SPOTTER 

            TREE BRANCHES DOWN AND POWER OUT AT MILLER BEACH. 

0628 PM     TSTM WND GST     PORTAGE                 41.59N 87.18W 
06/24/2013  E70.00 MPH       PORTER             IN   TRAINED SPOTTER 

            WINDS OF AT LEAST 70 MPH IN INGRAM MANOR. LARGE 2 FOOT 
            DIAMETER TREES SNAPPED. SOME SKIRTING AND SIDING BLOWN 
            OFF MOBILE HOMES. 

0630 PM     TSTM WND GST     4 SSW BURNS HARBOR      41.56N 87.17W 
06/24/2013  M79.00 MPH       PORTER             IN   MESONET         

0638 PM     TSTM WND GST     VALPARAISO              41.48N 87.05W 
06/24/2013  M58.00 MPH       PORTER             IN   ASOS            

0640 PM     TSTM WND DMG     1 S GIBSON CITY         40.45N 88.38W 
06/24/2013                   FORD               IL   LAW ENFORCEMENT 

            DELAYED REPORT. LARGE TREE UPROOTED AND ACROSS ROUTE 54. 


0640 PM     TSTM WND DMG     GIBSON CITY             40.47N 88.38W 
06/24/2013                   FORD               IL   LAW ENFORCEMENT 

            WHOLE ROW OF POWERPOLES DOWN IN A FIELD SOUTH OF ROUTE 9 
            ALONG 300E. 

0645 PM     TSTM WND DMG     MOMENCE                 41.16N 87.66W 
06/24/2013                   KANKAKEE           IL   TRAINED SPOTTER 

            TOP OF A PINE TREE FELL ON AND DAMAGED A FRONT PORCH NEAR
            SECOND STREET AND PINE STREET.

0645 PM     TSTM WND GST     MOMENCE                 41.16N 87.66W 
06/24/2013  M69.00 MPH       KANKAKEE           IL   TRAINED SPOTTER 

            NUMEROUS LARGE TREES UPROOTED AND ONE 1.5 INCH DIAMETER 
            TREE LIMB DOWN ON A CAR NEAR NORTH WILBUR ST AND E 
            CHATFIELD.

0646 PM     TSTM WND DMG     4 SSE ELLIOTT           40.41N 88.25W 
06/24/2013                   FORD               IL   LAW ENFORCEMENT 

            DELAYED REPORT. POWERLINES DOWN AND POWERPOLE BROKEN NEAR
            INTERSECTION OF 1000E AND 100N.

0700 PM     TSTM WND GST     MOUNT AYR               40.95N 87.30W 
06/24/2013  M71.00 MPH       NEWTON             IN   TRAINED SPOTTER 

            *** 1 INJ *** MULTIPLE TREES AND LIMBS BETWEEN 3 AND 18 
            INCHES IN DIAMETER AND POWER POLES DOWN BETWEEN 500N AND 
            800N ON STATE ROUTE 55. POWERLINES DOWN ACROSS A VEHICLE 
            WITH MOTORIST TRAPPED ON STATE ROUTE 55. TIME ESTIMATED. 


0710 PM     TSTM WND DMG     MUNSTER                 41.55N 87.50W 
06/24/2013                   LAKE               IN   TRAINED SPOTTER 

            TREES AND POWER LINES DOWN. 

0732 PM     TSTM WND DMG     FOWLER                  40.62N 87.32W 
06/24/2013                   BENTON             IN   911 CALL CENTER 

            LARGE BRANCH DOWN

0750 PM     TSTM WND DMG     2 W OTTERBEIN           40.49N 87.13W 
06/24/2013                   BENTON             IN   911 CALL CENTER 

            TREES AND POWER LINES ARE DOWN.


&&

$$

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