762
NWUS53 KLOT 201609
LSRLOT
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHICAGO IL
1109 AM CDT THU AUG 20 2026
.TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON
.DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.
..REMARKS..
0921 AM TSTM WND GST POLO 41.98N 89.58W
08/11/2026 M75 MPH OGLE IL PUBLIC
PRIVATE WEATHER STATION ON THE SOUTH SIDE OF
POLO MEASURED 75.2 MPH AND 70.7 MPH WIND
GUSTS AT 9:21 AM AND 9:22 AM WITH TREES
SEVERELY BENDING AND TREE LIMBS SNAPING.
0924 AM TSTM WND DMG 4 N SUBLETTE 41.71N 89.24W
08/11/2026 LEE IL PUBLIC
PHOTO ON SOCIAL MEDIA SHOWED A LARGE TREE
DOWN NEAR INLET ROAD AND SHAW ROAD. SEVERAL
OTHER TREES BLOWN DOWN NEARBY.
0932 AM HAIL CEDAR LAKE 41.37N 87.44W
08/11/2026 M0.88 INCH LAKE IN TRAINED SPOTTER
0936 AM HAIL 1 S CROWN POINT 41.40N 87.36W
08/11/2026 M1.00 INCH LAKE IN PUBLIC
REPORT FROM MPING: QUARTER (1.00 IN.).
0954 AM TSTM WND GST 3 WNW TROY GROVE 41.49N 89.13W
08/11/2026 M55 MPH LA SALLE IL PUBLIC
PRIVATE WEATHER STATION: 3.7 WNW TROY GROVE.
0959 AM TSTM WND DMG OTTAWA 41.35N 88.84W
08/11/2026 LA SALLE IL PUBLIC
NUMEROUS LARGE TREES AND TREE BRANCHES WERE
DOWNED ALONG OTTAWA AVE. ADDITIONAL TREE
DAMAGE WAS REPORTED ALONG TAYLOR AND CLAY
STREETS. TIME ESTIMATED BY RADAR.
1000 AM TSTM WND GST 3 ENE TRIUMPH 41.51N 88.97W
08/11/2026 M53 MPH LA SALLE IL PUBLIC
PRIVATE WEATHER STATION: 6.1 SSW EARLVILLE.
1003 AM TSTM WND DMG 1 NNE SANDWICH 41.66N 88.62W
08/11/2026 DE KALB IL EMERGENCY MNGR
TWO APPROX 8 INCH DIAMETER BRANCHES DOWN ON
PLEASANT STREET.
1007 AM TSTM WND DMG 1 ESE BIG ROCK 41.76N 88.52W
08/11/2026 KANE IL PUBLIC
PHOTO ON SOCIAL MEDIA SHOWED A TREE 12 TO 18
INCHES IN DIAMETER SNAPPED AND FELL ONTO A
FENCE IN A SUBDIVISION NEAR GARNART ROAD.
1010 AM TSTM WND DMG 1 WNW MARSEILLES 41.34N 88.72W
08/11/2026 LA SALLE IL PUBLIC
PHOTO SHARED VIA SOCIAL MEDIA SHOWS LARGE
TREE BRANCH DOWNED ONTO CAR NEAR CLAYTON
STREET AND GLEN AVENUE. TIME ESTIMATED BY
RADAR.
1011 AM TSTM WND GST 2 WNW SUGAR GROVE 41.77N 88.48W
08/11/2026 M85 MPH KANE IL ASOS
KARR - AURORA / SUGAR GROVE AIRPORT.
1011 AM TSTM WND GST SUGAR GROVE 41.76N 88.45W
08/11/2026 E70 MPH KANE IL TRAINED SPOTTER
SIGNIFICANT TREE DAMAGE REPORTED IN TOWN.
1012 AM TSTM WND DMG 1 NNW SUGAR GROVE 41.77N 88.45W
08/11/2026 KANE IL PUBLIC
PHOTO ON SOCIAL MEDIA SHOWED A LARGE TREE
BLOWN DOWN PARTIALLY BLOCKING A RESIDENTIAL
ROAD NEAR GALENA BOULEVARD AND ROUTE 47.
1013 AM TSTM WND DMG 1 NE YORKVILLE 41.65N 88.44W
08/11/2026 KENDALL IL PUBLIC
PHOTO SHARED OF A LARGE TREE DOWN. TIME
ESTIMATED BY RADAR.
1013 AM TSTM WND GST 1 SE SUGAR GROVE 41.75N 88.44W
08/11/2026 M97 MPH KANE IL PUBLIC
HOME WEATHER STATION MEASURED A 97 MPH WIND
GUST.
1014 AM TORNADO 2 W OSWEGO 41.68N 88.40W
08/11/2026 KENDALL IL NWS STORM SURVEY
NWS SURVEY CONFIRMS AN EF-0 TORNADO WITH
PEAK WINDS NEAR 75 MPH, PEAK WIDTH OF 150
YARDS, AND PATH LENGTH OF 5.2 MILES.
1014 AM TSTM WND GST 1 NE LILY LAKE 41.96N 88.47W
08/11/2026 M66 MPH KANE IL PUBLIC
1015 AM TSTM WND DMG 1 N SENECA 41.32N 88.61W
08/11/2026 LA SALLE IL PUBLIC
PHOTO ON SOCIAL MEDIA SHOWED A LARGE TREE
LIMB SNAPPED OFF A TREE NEAR MAIN STREET AND
JACKSON STREET.
1015 AM TSTM WND GST 2 ENE MARSEILLES 41.34N 88.66W
08/11/2026 M53 MPH LA SALLE IL PUBLIC
PRIVATE WEATHER STATION: 1.8 ENE MARSEILLES.
1016 AM TSTM WND DMG 1 N BOULDER HILL 41.72N 88.33W
08/11/2026 KENDALL IL LOCAL OFFICIAL
MULTIPLE LARGE BRANCHES 6-8 INCHES IN
DIAMETER DOWN NORTH SIDE OF TOWN.
1018 AM TSTM WND DMG 1 NNW OSWEGO 41.69N 88.36W
08/11/2026 KENDALL IL TRAINED SPOTTER
TREE BRANCHES REPORTED DOWN.
1018 AM TSTM WND GST 2 SE YORKVILLE 41.62N 88.43W
08/11/2026 M64 MPH KENDALL IL PUBLIC
1019 AM TSTM WND GST 1 SE SENECA 41.30N 88.59W
08/11/2026 M60 MPH LA SALLE IL PUBLIC
PRIVATE WEATHER STATION.
1020 AM TORNADO 5 E SENECA 41.31N 88.51W
08/11/2026 GRUNDY IL NWS STORM SURVEY
AN NWS STORM SURVEY CONFIRMED THAT AN EF-0
TORNADO WITH ESTIMATED PEAK WINDS OF 80 MPH,
A PATH LENGTH OF 1.6 MILES, AND A PEAK WIDTH
OF 250 YARDS OCCURRED IN NORMAN TOWNSHIP,
SOUTHWEST OF MORRIS.
1021 AM TSTM WND GST 1 ENE OSWEGO 41.69N 88.33W
08/11/2026 M65 MPH KENDALL IL PUBLIC
PRIVATE WEATHER STATION: 0.9 SSE OSWEGO.
1021 AM TSTM WND DMG 4 WNW BATAVIA 41.87N 88.38W
08/11/2026 KANE IL PUBLIC
PHOTOS OF SNAPPED TREE BRANCHES. TIME
ESTIMATED BY RADAR.
1022 AM TSTM WND DMG ST. CHARLES 41.91N 88.32W
08/11/2026 KANE IL PUBLIC
LARGE BRANCHES DOWNED ACROSS TOWN. RELAYED
BY SOCIAL MEDIA.
1023 AM TORNADO 3 N MORRIS 41.40N 88.42W
08/11/2026 GRUNDY IL NWS STORM SURVEY
AN NWS STORM SURVEY CONFIRMED THAT AN EF-0
TORNADO WITH ESTIMATED PEAK WINDS OF 80 MPH,
A PATH LENGTH OF 2.2 MILES, AND A PEAK WIDTH
OF 150 YARDS OCCURRED ON THE NORTHEAST SIDE
OF MORRIS.
1023 AM TSTM WND DMG 3 E AURORA 41.76N 88.26W
08/11/2026 DUPAGE IL PUBLIC
PHOTO ON SOCIAL MEDIA SHOWED A LARGE TREE
COMPLETELY UPROOTED NEAR KAUTZ ROAD AND NEW
YORK STREET.
1024 AM TSTM WND DMG 4 W PLAINFIELD 41.63N 88.27W
08/11/2026 KENDALL IL PUBLIC
SHINGLE DAMAGE, DAMAGE TO GAZEBO, AND FLAG
POLE RIPPED OFF OF HOUSE.
1024 AM TSTM WND GST 3 SE BATAVIA 41.82N 88.27W
08/11/2026 M89 MPH KANE IL PUBLIC
PRIVATE WEATHER STATION: KILAUROR58.
1025 AM TSTM WND DMG 2 NNE MORRIS 41.39N 88.41W
08/11/2026 GRUNDY IL PUBLIC
PHOTO ON SOCIAL MEDIA SHOWED A SEMI TRUCK
BLOWN OVER INTO POWER LINES ON ROUTE 6
BETWEEN ROUTE 47 AND ASHLEY ROAD.
1027 AM TSTM WND DMG 1 WNW CRYSTAL LAWNS 41.57N 88.17W
08/11/2026 WILL IL PUBLIC
TREE DAMAGE AND MINOR FASCIA DAMAGE TO A
HOUSE WEST OF JOLIET MALL.
1027 AM TSTM WND DMG WARRENVILLE 41.82N 88.17W
08/11/2026 DUPAGE IL EMERGENCY MNGR
REPORTS OF TREES AND WIRES DOWN THROUGHOUT
TOWN, WITH A FEW STRUCTURES DAMAGED; MOSTLY
BETWEEN RT 56 AND I-88.
1028 AM TSTM WND DMG 2 W BOLINGBROOK 41.70N 88.11W
08/11/2026 WILL IL NWS EMPLOYEE
A 12 INCH DIAMETER TREE WAS BLOWN DOWN
PARTIALLY BLOCKING A ROAD NEAR JAMIE MCGEE
ELEMENTARY SCHOOL.
1028 AM TSTM WND GST 2 NW PLAINFIELD 41.63N 88.23W
08/11/2026 E88 MPH WILL IL NWS EMPLOYEE
CORRECTS PREVIOUS TSTM WND GST REPORT FROM 2
NW PLAINFIELD.
1028 AM TSTM WND DMG 2 WSW BOLINGBROOK 41.69N 88.11W
08/11/2026 WILL IL NWS EMPLOYEE
ONE TREE AND SEVERAL TREE LIMBS BLOWN DOWN
NEAR JANE ADDAMS MIDDLE SCHOOL.
1028 AM TSTM WND GST 2 SSE PLAINFIELD 41.58N 88.19W
08/11/2026 E80 MPH WILL IL COCORAHS
RECEIVED 1.59 INCHES OF RAIN SO FAR. POWER
OUT WITH TREE AND SIDING DAMAGE TO HOMES.
1028 AM TSTM WND GST 2 NNW WARRENVILLE 41.84N 88.19W
08/11/2026 E80 MPH DUPAGE IL EMERGENCY MNGR
A CORRIDOR OF DESTRUCTIVE WINDS IMPACTED
WARRENVILLE AND A PORTION OF LISLE DURING
THE DERECHO ON AUGUST 11. EXTENSIVE TREE
DAMAGE OCCURRED IN BLACKWELL FOREST
PRESERVE, HERRICK LAKE FOREST PRESERVE, AND
DANADA FOREST PRESERVE WITH SNAPPED AND
UPROOTED TREES. IN ADDITION, EXTENSIVE TREE
DAMAGE OCCURRED THROUGHOUT WARRENVILLE
INCLUDING THE SNAPPING AND UPROOTING OF
TREES RANGING IN SIZE FROM 1 TO 3 FEET IN
DIAMETER. SEVERAL TREES FELL ON HOMES
CAUSING STRUCTURE DAMAGE, AS WELL. BASED ON
VIDEO FOOTAGE AND WITNESS REPORTS, THE
DAMAGE WAS MOST LIKELY CAUSED BY STRAIGHT
LINE WINDS IN EXCESS OF 80 MPH ON THE
SOUTHERN SIDE OF A RADAR-INDICATED ROTATION
PATH. THANK YOU TO EMERGENCY MANAGEMENT
PARTNERS IN WARRENVILLE AND DUPAGE COUNTY
FOREST PRESERVE FOR THEIR HELP IN THIS
REPORT.
1029 AM TSTM WND DMG 4 SSW NAPERVILLE 41.73N 88.19W
08/11/2026 WILL IL AMATEUR RADIO
TREE BRANCHES 4-6 INCH DIAMETER DOWN NEAR
95TH AND BOOK ROAD.
1029 AM TSTM WND DMG PLAINFIELD 41.61N 88.21W
08/11/2026 WILL IL PUBLIC
PHOTO ON SOCIAL MEDIA SHOWED A LARGE TREE
AND POWER LINES BLOWN DOWN NEAR JAMES STREET
AND COMMERCIAL STREET. MANY OTHER TREES
DAMAGED NEARBY.
1029 AM TSTM WND DMG 3 SW WARRENVILLE 41.79N 88.21W
08/11/2026 DUPAGE IL TRAINED SPOTTER
LARGE TREE BRANCHES DOWN.
1030 AM TSTM WND DMG 1 E CRYSTAL LAWNS 41.57N 88.14W
08/11/2026 WILL IL PUBLIC
PHOTO ON SOCIAL MEDIA SHOWED A HEALTHY TREE
ROUGHLY ONE FOOT IN DIAMETER COMPLETELY
SNAPPED AT ITS BASE ON LOCH LANE.
1030 AM TSTM WND DMG 1 SE CRYSTAL LAWNS 41.56N 88.14W
08/11/2026 WILL IL TRAINED SPOTTER
SCATTERED TREE LIMBS 4 TO 8 INCHES IN
DIAMETER SNAPPED AND BLOWN DOWN.
1030 AM TSTM WND DMG 2 NNE CRYSTAL LAWNS 41.59N 88.15W
08/11/2026 WILL IL PUBLIC
MULTIPLE TREES AND LARGE TREE LIMBS BLOWN
DOWN WEST OF GAYLORD ROAD BETWEEN DIVISION
STREET AND RENWICK ROAD.
1030 AM TSTM WND GST 2 NW PLAINFIELD 41.63N 88.23W
08/11/2026 M62 MPH WILL IL PUBLIC
PRIVATE WEATHER STATION: 2.3 NW PLAINFIELD.
1030 AM FLOOD 3 E BOULDER HILL 41.72N 88.29W
08/11/2026 KENDALL IL TRAINED SPOTTER
APPROX 1-2 INCHES OF WATER ON ROADWAY AT
INTERSECTION OF RT 30 AND RT 34.
1031 AM TSTM WND GST 2 NNW SHOREWOOD 41.55N 88.21W
08/11/2026 M96 MPH WILL IL PUBLIC
PRIVATE WEATHER STATION.
1031 AM TSTM WND DMG 1 WSW CAROL STREAM 41.91N 88.16W
08/11/2026 DUPAGE IL PUBLIC
PHOTO SENT OF A 8 INCH DIAMETER TREE
SNAPPED. TIME ESTIMATED BY RADAR.
1031 AM TSTM WND DMG 1 WNW LISLE 41.80N 88.09W
08/11/2026 DUPAGE IL PUBLIC
PHOTO ON SOCIAL MEDIA SHOWS A LARGE TREE
DOWN. NUMEROUS TREES DOWN ALL OVER THE
NEIGHBORHOOD.
1032 AM TSTM WND DMG 2 WNW ROCKDALE 41.51N 88.15W
08/11/2026 WILL IL PUBLIC
PHOTO ON SOCIAL MEDIA SHOWED A LARGE TREE
LIMB SNAPPED OFF A TREE NEAR CATERPILLAR
DRIVE AND MCDONOUGH STREET.
1032 AM TSTM WND DMG 1 W COAL CITY 41.29N 88.29W
08/11/2026 GRUNDY IL PUBLIC
A LARGE TREE WAS SNAPPED SEVERAL FEET ABOVE
THE GROUND AND FELL ONTO A HOUSE ALONG ROUTE
113 CAUSING DAMAGE.
1032 AM TSTM WND DMG 1 NE WINFIELD 41.88N 88.14W
08/11/2026 DUPAGE IL EMERGENCY MNGR
TREES DOWNED ONTO POWER LINES.
1033 AM TSTM WND DMG 1 WNW JOLIET 41.53N 88.11W
08/11/2026 WILL IL PUBLIC
LARGE BRANCHES DOWNED, RELAYED BY SOCIAL
MEDIA. TIME ESTIMATED BY RADAR.
1034 AM TSTM WND GST NWS CHICAGO-ROMEOVILLE 41.60N 88.08W
08/11/2026 M58 MPH WILL IL OFFICIAL NWS OBS
PEAK WIND GUST OF 58 MPH MEASURED BY DAVIS
WEATHER STATION AT NWS CHICAGO OFFICE.
SEVERE GUSTS LASTED FOR 5 TO 10 MINUTES AS
THE STORM MOVED OVERHEAD. THERE ARE NUMEROUS
SMALL BRANCHES DOWN IN THE VICINITY OF THE
OFFICE.
1034 AM TSTM WND DMG 1 ESE LISLE 41.79N 88.05W
08/11/2026 DUPAGE IL PUBLIC
PHOTO ON SOCIAL MEDIA SHOWED A LARGE TREE
COMPLETELY UPROOTED NEAR THATCHER ROAD AND
WALNUT AVENUE.
1035 AM TSTM WND DMG 4 E BOULDER HILL 41.70N 88.25W
08/11/2026 WILL IL PUBLIC
6 INCH TREE BRANCHES REPORTED DOWN AT AURORA
AT EOLA AND RIDGE.
1035 AM TSTM WND GST 1 W BRAIDWOOD 41.26N 88.23W
08/11/2026 E70 MPH WILL IL EMERGENCY MNGR
1035 AM TSTM WND DMG 1 E LOCKPORT 41.59N 88.03W
08/11/2026 WILL IL PUBLIC
SEVERAL PUBLIC REPORTS OF TREES DOWNED IN
AND NEAR LOCKPORT.
1036 AM TSTM WND DMG 3 NE LOCKPORT 41.62N 88.03W
08/11/2026 WILL IL PUBLIC
LARGE BRANCHES BROKEN NEAR ARCHER AND SMITH
ROADS INTERSECTION.
1037 AM TSTM WND DMG 1 NNE NEW LENOX 41.53N 87.96W
08/11/2026 WILL IL PUBLIC
PHOTOS SENT OF SNAPPED TREE BRANCHES. TIME
ESTIMATED BY RADAR.
1037 AM TORNADO 1 WNW WILMINGTON 41.31N 88.16W
08/11/2026 WILL IL NWS STORM SURVEY
NWS SURVEY CONFIRMS AN EF-1 TORNADO WITH
PEAK WINDS NEAR 90 MPH, PEAK WIDTH OF 150
YARDS, AND PATH LENGTH OF 1.52 MILES.
1037 AM TSTM WND GST 2 NNW MAZON 41.27N 88.44W
08/11/2026 M65 MPH GRUNDY IL PUBLIC
PRIVATE WEATHER STATION.
1038 AM TSTM WND GST 2 N LEMONT 41.70N 88.00W
08/11/2026 M70 MPH DUPAGE IL OTHER FEDERAL
PEAK WIND GUST OF 70 MPH MEASURED BY SONIC
ANEMOMETER AT A HEIGHT OF 10M.
1038 AM TSTM WND DMG 2 SW DARIEN 41.73N 88.01W
08/11/2026 DUPAGE IL TRAINED SPOTTER
REPORT OF 18 INCH DIAMETER TREE DOWN.
1038 AM TSTM WND DMG 1 SSE DOWNERS GROVE 41.78N 88.01W
08/11/2026 DUPAGE IL PUBLIC
MULTIPLE LARGE BRANCHES BROKEN, ONE TREE
SNAPPED.
1038 AM TSTM WND DMG 2 WNW DARIEN 41.76N 88.01W
08/11/2026 DUPAGE IL PUBLIC
PHOTOS SHARED VIA SOCIAL MEDIA SHOW MULTIPLE
LARGE BRANCHES BROKEN NEAR MCCOLLUM PARK.
1038 AM TSTM WND DMG 1 S LEMONT 41.66N 88.00W
08/11/2026 COOK IL PUBLIC
CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 1
S LEMONT. MULTIPLE PUBLIC REPORTS OF LARGE
TREE LIMBS DOWNED IN LEMONT.
1039 AM TORNADO 3 N NEW LENOX 41.55N 87.96W
08/11/2026 WILL IL NWS STORM SURVEY
NWS SURVEY CONFIRMS AN EF-1 TORNADO WITH
PEAK WINDS NEAR 95 MPH, PEAK WIDTH OF 200
YARDS, AND PATH LENGTH OF 7.6 MILES.
1039 AM TSTM WND GST COAL CITY 41.29N 88.28W
08/11/2026 M70 MPH GRUNDY IL PUBLIC
PRIVATE WEATHER STATION: KILCOALC4.
1040 AM TSTM WND DMG 2 S HOMER GLEN 41.57N 87.94W
08/11/2026 WILL IL PUBLIC
SEVERAL TREES DOWNED ACROSS SOUTHERN
PORTIONS OF HOMER GLEN.
1040 AM TSTM WND GST 2 NW PLAINFIELD 41.63N 88.23W
08/11/2026 M88 MPH WILL IL PUBLIC
SECOND PERSONAL WEATHER STATION MEASURED AN
88 MPH WIND GUST IN PLAINFIELD.
1040 AM TSTM WND DMG 1 NW CLARENDON HILLS 41.81N 87.97W
08/11/2026 DUPAGE IL OTHER FEDERAL
SMALL BRANCHES (1-3 INCHES) DOWN ON HOME.
1040 AM TSTM WND DMG 2 SSW NAPERVILLE 41.75N 88.16W
08/11/2026 DUPAGE IL EMERGENCY MNGR
NUMEROUS REPORTS FROM EMA OF DOWNED TREES
AND FLOODING THROUGHOUT TOWN.
1041 AM TORNADO 3 SE HOMER GLEN 41.57N 87.91W
08/11/2026 COOK IL NWS STORM SURVEY
NWS SURVEY CONFIRMS AN EF-1 TORNADO WITH
PEAK WINDS NEAR 105 MPH, PEAK WIDTH OF 300
YARDS, AND PATH LENGTH OF 22.4 MILES.
1042 AM TSTM WND GST FRANKFORT 41.49N 87.85W
08/11/2026 E75 MPH WILL IL LOCAL OFFICIAL
SUSTAINED WINDS ESTIMATED 55 MPH WITH GUSTS
IN EXCESS OF 75 MPH.
1043 AM TORNADO 5 SSW FRANKFORT 41.43N 87.88W
08/11/2026 WILL IL NWS STORM SURVEY
NWS SURVEY CONFIRMS AN EF-2 TORNADO WITH
PEAK WINDS NEAR 115 MPH, PEAK WIDTH OF 300
YARDS, AND PATH LENGTH OF 25.8 MILES.
1044 AM TSTM WND DMG 1 S HINSDALE 41.79N 87.93W
08/11/2026 DUPAGE IL TRAINED SPOTTER
NUMEROUS BRANCHES DOWN WITH TREES BLOCKING
EASTBOUND 55TH STREET.
1044 AM TSTM WND GST 1 WNW WESTMONT 41.80N 87.99W
08/11/2026 M55 MPH DUPAGE IL PUBLIC
PRIVATE WEATHER STATION: KILDOWNE102.
1045 AM TSTM WND DMG SW ORLAND PARK 41.56N 87.89W
08/11/2026 WILL IL PUBLIC
ROOF OFF OF A BUILDING NEAR 183RD PLACE AND
WOLF ROAD - TIME ESTIMATED FROM RADAR.
1045 AM TSTM WND DMG MANTENO 41.25N 87.83W
08/11/2026 KANKAKEE IL PUBLIC
ROOF DAMAGE TO A BUILDING.
1045 AM TSTM WND DMG 1 NW JUSTICE 41.75N 87.85W
08/11/2026 COOK IL FIRE DEPT/RESCUE
MULTIPLE TREES DOWNED IN JUSTICE.
1046 AM TSTM WND DMG 1 NW FRANKFORT SQUARE 41.53N 87.82W
08/11/2026 WILL IL EMERGENCY MNGR
PARTIAL ROOF REMOVED FROM RESIDENCE.
1046 AM TSTM WND DMG 1 SSE PALOS PARK 41.65N 87.82W
08/11/2026 COOK IL PUBLIC
PHOTO ON SOCIAL MEDIA SHOWED A LARGE PINE
TREE ON A HOUSE ON 83RD AVENUE BETWEEN 131ST
STREET AND 135TH STREET.
1047 AM TSTM WND DMG 1 NE FRANKFORT SQUARE 41.53N 87.79W
08/11/2026 WILL IL PUBLIC
SEMI BLOWN OVER NEAR VOLLMER ROAD AND HARLEM
AVENUE. TIME ESTIMATED BY RADAR.
1047 AM TSTM WND DMG NORTH RIVERSIDE 41.85N 87.82W
08/11/2026 COOK IL PUBLIC
PHOTO ON SOCIAL MEDIA SHOWED LARGE TREE
LIMBS BLOWN DOWN NEAR 23RD STREET AND DES
PLAINES AVENUE.
1047 AM TSTM WND DMG BRIDGEVIEW 41.75N 87.81W
08/11/2026 COOK IL PUBLIC
PHOTOS SHARED OF LARGE TREE BRANCHES
SNAPPED. TIME ESTIMATED BY RADAR.
1048 AM TSTM WND DMG 1 ESE MONEE 41.42N 87.74W
08/11/2026 WILL IL PUBLIC
REPORT OF NUMEROUS TREES AND POWER LINES
REPORTED DOWN THROUGHOUT TOWN.
1048 AM TSTM WND DMG 1 SSE TINLEY PARK 41.56N 87.79W
08/11/2026 COOK IL EMERGENCY MNGR
REPORT OF SIGNIFICANT ROOF DAMAGE AND
WINDOWS BLOWN OUT OF A SHOPPING CENTER AND
NEARBY RESIDENTIAL BUILDING.
1049 AM TSTM WND DMG 1 ENE RICHTON PARK 41.49N 87.71W
08/11/2026 COOK IL PUBLIC
PHOTO SHARED TO SOCIAL MEDIA SHOWS DAMAGE TO
CANOPY OVER ROADWAY AT RICHTON PARK METRA
STATION. TIME ESTIMATED BY RADAR.
1049 AM TSTM WND DMG 1 WSW OLYMPIA FIELDS 41.51N 87.71W
08/11/2026 COOK IL PUBLIC
MULTIPLE PUBLIC REPORTS OF TREES DOWNED IN
MATTESON AND OLYMPIA FIELDS.
1050 AM TSTM WND DMG 1 NNW PARK FOREST 41.49N 87.69W
08/11/2026 COOK IL PUBLIC
PHOTO SHARED VIA SOCIAL MEDIA SHOWS A FEW
LARGE BRANCHES BROKEN AT CENTRAL PARK IN
PARK FOREST. ALSO SEVERAL INCHES OF STANDING
WATER IN PARKING LOTS.
1051 AM TSTM WND DMG 1 ENE CRETE 41.45N 87.61W
08/11/2026 WILL IL EMERGENCY MNGR
LARGE PINE TREE UPROOTED, PARTIALLY BLOCKING
ROADWAY.
1051 AM TSTM WND DMG 1 ENE PARK FOREST 41.49N 87.68W
08/11/2026 COOK IL PUBLIC
PHOTOS SHARED TO SOCIAL MEDIA SHOW MULTIPLE
LARGE BRANCHES BROKEN AND AT LEAST 2 TREES
UPROOTED JUST NORTHEAST OF PARK FOREST
BUSINESS DISTRICT.
1051 AM TSTM WND DMG MIDLOTHIAN 41.62N 87.72W
08/11/2026 COOK IL PUBLIC
PHOTOS SHARED VIA SOCIAL MEDIA SHOW MULTIPLE
LARGE BRANCHES BROKEN IN MIDLOTHIAN. AT
LEAST ONE EVERGREEN UPROOTED.
1052 AM TSTM WND DMG CRETE 41.44N 87.63W
08/11/2026 WILL IL LOCAL OFFICIAL
LARGE TREE DOWN BLOCKING MAIN STREET.
1052 AM TSTM WND GST PEOTONE 41.33N 87.79W
08/11/2026 M87 MPH WILL IL CO-OP OBSERVER
PEAK WIND GUST OF 87 MPH. SECONDARY SENSOR
REPORTED A WIND GUST OF 78 MPH PRIOR TO
POWER LOSS. WIDESPREAD TREE DAMAGE REPORTED
AS WELL.
1052 AM TSTM WND DMG 1 SE FLOSSMOOR 41.54N 87.68W
08/11/2026 COOK IL PUBLIC
PHOTOS SHARED OF NUMEROUS LARGE TREE
BRANCHES DOWN DAMAGE TO THE ROOF OF THE
HOUSE AND GARAGE. TIME ESTIMATED BY RADAR.
1053 AM TSTM WND DMG 1 WNW CRETE 41.45N 87.64W
08/11/2026 WILL IL EMERGENCY MNGR
LARGE TREE UPROOTED, RESTING ON HOUSE.
1053 AM TSTM WND DMG 2 ESE CRETE 41.44N 87.59W
08/11/2026 WILL IL PUBLIC
OUTBUILDINGS AND MOBILE HOMES DAMAGED ON
BURVILLE ROAD EAST OF CRETE.
1053 AM TSTM WND DMG 1 S CRETE 41.44N 87.63W
08/11/2026 WILL IL EMERGENCY MNGR
LARGE TREE UPROOTED, BLOCKING ROADWAY.
1053 AM TSTM WND GST 1 N BEECHER 41.35N 87.62W
08/11/2026 M54 MPH WILL IL PUBLIC
PRIVATE WEATHER STATION.
1053 AM TSTM WND DMG BRADLEY 41.14N 87.86W
08/11/2026 KANKAKEE IL PUBLIC
PHOTOS SHARED VIA SOCIAL MEDIA SHOW UPROOTED
TREE IN BRADLEY. TIME ESTIMATED BY RADAR.
1053 AM TSTM WND DMG 1 E CHICAGO HEIGHTS 41.51N 87.63W
08/11/2026 COOK IL PUBLIC
PHOTO SHARED VIA SOCIAL MEDIA SHOWS SECTIONS
OF NORTH FACING WALL BLOWN OUT OR COLLAPSED
FROM SECOND FLOOR ROOM OF BUILDING AT GREEN
STREET AND US-30. LARGE SECTIONS OF SIDING
REMOVED FROM REMAINDER OF BUILDING. TIME
ESTIMATED BY RADAR.
1053 AM TSTM WND DMG BRIGHTON PARK - CHICAGO 41.82N 87.69W
08/11/2026 COOK IL PUBLIC
TREES UPROOTED. RELAYED BY SOCIAL MEDIA.
1053 AM TSTM WND DMG 1 SSE POSEN 41.62N 87.67W
08/11/2026 COOK IL PUBLIC
MULTIPLE PHOTOS SHARED TO SOCIAL MEDIA SHOW
LARGE BRANCHES BROKEN IN NEIGHBORHOODS NEAR
DIXIE HIGHWAY AND 150TH STREET. TIME
ESTIMATED BY RADAR.
1053 AM TSTM WND DMG HOMEWOOD 41.56N 87.67W
08/11/2026 COOK IL TRAINED SPOTTER
WIDESPREAD TREE DAMAGE SOUTH SIDE OF TOWN.
1054 AM TSTM WND DMG 3 WNW BOURBONNAIS 41.18N 87.93W
08/11/2026 KANKAKEE IL PUBLIC
PHOTO ON SOCIAL MEDIA SHOWED A LARGE TREE
LIMB BLOWN DOWN. WIDESPREAD TREES AND LIMBS
DOWN REPORTED NEAR N 3000 W ROAD AND ROUTE
102.
1054 AM TSTM WND DMG 1 NNE MIDWAY AIRPORT 41.79N 87.74W
08/11/2026 COOK IL PUBLIC
MULTIPLE PUBLIC REPORTS OF TREE DAMAGE IN
THE GARFIELD RIDGE, CLEARING, ARCHER
HEIGHTS, WEST ELSDON, WEST LAWN, BRIGHTON
PARK, GAGE PARK, AND CHICAGO LAWN COMMUNITY
AREAS OF CHICAGO. RELAYED VIA CHICAGO 311,
TIME ESTIMATED BY RADAR.
1054 AM TSTM WND DMG BLUE ISLAND 41.66N 87.68W
08/11/2026 COOK IL PUBLIC
MULTIPLE PHOTOS SHARED TO SOCIAL MEDIA SHOW
SMALL BRANCHES DOWNED IN BLUE ISLAND. A FEW
LARGER BRANCHES BROKEN. TIME ESTIMATED BY
RADAR.
1054 AM TSTM WND GST OAK FOREST 41.60N 87.75W
08/11/2026 M57 MPH COOK IL PUBLIC
PRIVATE WEATHER STATION: KILOAKFO13.
1055 AM TORNADO 1 ESE HOMEWOOD 41.55N 87.64W
08/11/2026 COOK IL NWS STORM SURVEY
AN EF-1 TORNADO BEGAN WEST OF HALSTED
BETWEEN 183RD AND 187TH, CROSSING HALSTED
AND CAUSING STRUCTURAL DAMAGE TO A STRIP
MALL AND SEVERAL BUILDINGS IN AN APARTMENT
COMPLEX. THE TORNADO THEN AFFECTED A
NEIGHBORHOOD EAST OF THE STRIP MALL, CAUSING
SUBSTANTIAL TREE DAMAGE AS WELL AS SOME ROOF
DAMAGE TO A HANDFUL OF HOMES. THE TORNADO
UPROOTED AND SNAPPED NUMEROUS TREES ACROSS A
CEMETERY OFF OF GLENWOOD THORNTON RD BEFORE
CONTINUING EAST THROUGH THE THORNTON-LANSING
ROAD NATURE PRESERVE. THE TORNADO DISSIPATED
JUST EAST OF 394 SOUTH OF THORNTON-LANSING
RD.
1055 AM TSTM WND DMG 1 W SAUK VILLAGE 41.49N 87.59W
08/11/2026 COOK IL PUBLIC
7 TRAILERS BLOWN OVER IN INDUSTRIAL AREA.
TIME ESTIMATED BY RADAR.
1056 AM TSTM WND DMG 1 WSW DYER 41.49N 87.52W
08/11/2026 LAKE IN PUBLIC
PHOTOS SHARED OF SIDING STRIPPED OFF A
HOUSE. TIME ESTIMATED BY RADAR.
1056 AM TSTM WND DMG 1 ESE GARFIELD PARK - C 41.88N 87.70W
08/11/2026 COOK IL PUBLIC
MULTIPLE PUBLIC REPORTS OF TREE DAMAGE IN
THE HUMBOLDT PARK, WEST TOWN, WEST GARFIELD
PARK, EAST GARFIELD PARK, AND NEAR WEST SIDE
COMMUNITY AREAS OF CHICAGO. RELAYED VIA
CHICAGO 311, TIME ESTIMATED BY RADAR.
1056 AM TSTM WND DMG 1 NW DOLTON 41.64N 87.61W
08/11/2026 COOK IL PUBLIC
MULTIPLE PHOTOS SHARED TO SOCIAL MEDIA SHOW
LARGE BRANCHES DOWNED ACROSS DOLTON.
MULTIPLE LARGE TREES UPROOTED. TIME
ESTIMATED BY RADAR.
1056 AM TSTM WND DMG 1 NNE SAUK VILLAGE 41.50N 87.56W
08/11/2026 COOK IL PUBLIC
PHOTOS SHARED TO SOCIAL MEDIA SHOWS MULTIPLE
LARGE BRANCHES DOWNED IN MOBILE HOME PARK
NEAR SAUK VILLAGE. AT LEAST ONE TREE WITH
TRUNK SPLIT AND LIMBS COLLAPSED ONTO
STRUCTURES. TIME ESTIMATED BY RADAR.
1056 AM TSTM WND DMG 1 WSW AUBURN-GRESHAM 41.74N 87.68W
08/11/2026 COOK IL PUBLIC
MULTIPLE PUBLIC REPORTS OF TREE DAMAGE IN
THE ASHBURN, AUBURN GRESHAM, BEVERLY, AND
WASHINGTON HEIGHTS COMMUNITY AREAS OF
CHICAGO. MOST CONCENTRATED DAMAGE APPEARS
BETWEEN 79TH AND 87TH STREET. RELAYED VIA
CHICAGO 311, TIME ESTIMATED BY RADAR.
1057 AM TSTM WND DMG MOMENCE 41.16N 87.66W
08/11/2026 KANKAKEE IL PUBLIC
PHOTO SHARED VIA SOCIAL MEDIA SHOWS LARGE
TREE BRANCH DOWNED ONTO CAR IN MOMENCE.
EXACT LOCATION UNKNOWN. TIME ESTIMATED BY
RADAR.
1057 AM TSTM WND DMG 1 NE WASHINGTON HTS - C 41.73N 87.63W
08/11/2026 COOK IL PUBLIC
MULTIPLE PUBLIC REPORTS OF TREE DAMAGE IN
THE WASHINGTON HEIGHTS, ROSELAND, CHATHAM
AND BURNSIDE COMMUNITY AREAS OF CHICAGO.
MOST CONCENTRATED DAMAGE APPEARS TO BE
BETWEEN 87TH STREET AND 95TH STREET. RELAYED
VIA CHICAGO 311, TIME ESTIMATED BY RADAR.
1057 AM TSTM WND DMG 1 SE THORNTON 41.57N 87.61W
08/11/2026 COOK IL EMERGENCY MNGR
NUMEROUS TREES DOWNED ACROSS THORNTON.
1058 AM TSTM WND GST ST. JOHN 41.45N 87.48W
08/11/2026 M80 MPH LAKE IN TRAINED SPOTTER
1059 AM TSTM WND GST 3 NE BRADLEY 41.17N 87.83W
08/11/2026 M91 MPH KANKAKEE IL PUBLIC
CORRECTS PREVIOUS TSTM WND GST REPORT FROM 3
NE BRADLEY. PRIVATE WEATHER STATION:
KILBOURB2.
1059 AM TSTM WND DMG CALUMET HTS. - CHICAGO 41.73N 87.58W
08/11/2026 COOK IL PUBLIC
WIDESPREAD PUBLIC REPORTS OF TREE DAMAGE IN
THE AVALON PARK, CALUMET HEIGHTS, AND SOUTH
CHICAGO COMMUNITY AREAS OF CHICAGO. MOST
CONCENTRATED AREA OF DAMAGE APPEARS TO BE
BETWEEN 87TH STREET AND 100TH STREET.
RELAYED VIA CHICAGO 311, TIME ESTIMATED BY
RADAR.
1059 AM TSTM WND DMG 1 WNW CRESTWOOD 41.66N 87.76W
08/11/2026 COOK IL PUBLIC
LARGE BRANCHES DOWNED, RELAYED BY SOCIAL
MEDIA.
1100 AM TSTM WND GST 3 NE NAVY PIER 41.92N 87.57W
08/11/2026 M60 MPH LMZ741 IL MESONET
MESONET STATION CHII2 HARRISON-DEVER CRIB.
PEAK GUST OF 52.1 KT BEFORE DATA LOSS.
1100 AM TSTM WND DMG CROWN POINT 41.42N 87.36W
08/11/2026 LAKE IN FIRE DEPT/RESCUE
NUMEROUS TREES AND POWER LINES DOWN
THROUGHOUT TOWN, BLOCKING MANY ROADWAYS.
1100 AM TSTM WND DMG 1 NNW MUNSTER 41.56N 87.51W
08/11/2026 LAKE IN PUBLIC
NUMEROUS TREES REPORTED UPROOTED AND DOWN IN
TOWN. SOME ROADWAYS BLOCKED. RELAYED BY
BROADCAST MEDIA.
1100 AM TSTM WND DMG 1 ENE CEDAR LAKE 41.37N 87.43W
08/11/2026 LAKE IN PUBLIC
PHOTO SHARED TO SOCIAL MEDIA SHOWS TREE
UPROOTED ALONG THE SHORE OF CEDAR LAKE. TIME
ESTIMATED BY RADAR.
1100 AM TSTM WND DMG 1 SW DOUGLAS - CHICAGO 41.83N 87.63W
08/11/2026 COOK IL PUBLIC
ISOLATED TO WIDELY SCATTERED PUBLIC REPORTS
OF TREE DAMAGE IN THE BRIDGEPORT, ARMOUR
SQUARE, DOUGLAS, NEW CITY, FULLER PARK,
GRAND BOULEVARD, OAKLAND, AND KENWOOD
COMMUNITY AREAS OF CHICAGO. RELAYED VIA
CHICAGO 311, TIME ESTIMATED BY RADAR.
1100 AM TSTM WND DMG CALUMET CITY 41.61N 87.53W
08/11/2026 COOK IL PUBLIC
PHOTOS AND VIDEOS SHARED VIA SOCIAL MEDIA
SHOW LARGE BRANCHES DOWNED IN CALUMET CITY.
TIME ESTIMATED BY RADAR.
1101 AM TSTM WND GST 2 E MOKENA 41.53N 87.84W
08/11/2026 M91 MPH WILL IL TRAINED SPOTTER
NEAR 195TH AND LA GRANGE ROAD.
1102 AM TSTM WND DMG HIGHLAND 41.55N 87.45W
08/11/2026 LAKE IN PUBLIC
PHOTOS SHARED OF A TREE BRANCH THAT IMPALED
THE INTERIOR CEILING. TIME ESTIMATED BY
RADAR.
1102 AM TSTM WND DMG 1 S GRIFFITH 41.52N 87.43W
08/11/2026 LAKE IN PUBLIC
LARGE BRANCHES DOWN ON RENSSELAER STREET.
TIME ESTIMATED BY RADAR.
1102 AM TSTM WND DMG 1 NE PORTAGE PARK - CHI 41.96N 87.75W
08/11/2026 COOK IL PUBLIC
ISOLATED TO WIDELY SCATTERED PUBLIC REPORTS
OF TREE DAMAGE IN THE NORWOOD PARK,
JEFFERSON PARK, FOREST GLEN, PORTAGE PARK,
DUNNING, IRVING PARK, ALBANY PARK, AND NORTH
PARK COMMUNITY AREAS OF CHICAGO. RELAYED VIA
CHICAGO 311, TIME ESTIMATED BY RADAR.
1103 AM TSTM WND GST 2 NE CEDAR LAKE 41.38N 87.42W
08/11/2026 M73 MPH LAKE IN PUBLIC
PRIVATE WEATHER STATION: KINCEDAR5.
1103 AM TSTM WND GST MUNSTER 41.54N 87.50W
08/11/2026 M85 MPH LAKE IN PUBLIC
CORRECTS PREVIOUS TSTM WND GST REPORT FROM
MUNSTER. PEAK GUST ON PRIVATE WEATHER
STATION.
1103 AM TSTM WND DMG 2 N BRAIDWOOD 41.29N 88.21W
08/11/2026 WILL IL PUBLIC
THERE ARE NUMEROUS TREES DOWN IN THE AREA.
1104 AM TSTM WND DMG WHITING 41.68N 87.50W
08/11/2026 LAKE IN PUBLIC
PHOTOS SHARED OF LARGE TREE BRANCHES
SNAPPED. TIME ESTIMATED BY RADAR.
1104 AM TSTM WND GST 1 ESE ST. JOHN 41.44N 87.45W
08/11/2026 M72 MPH LAKE IN PUBLIC
PRIVATE WEATHER STATION: KINSAINT.
1105 AM TSTM WND DMG 4 WSW NEW CHICAGO 41.54N 87.34W
08/11/2026 LAKE IN PUBLIC
PHOTO SHARED VIA SOCIAL MEDIA SHOWS BROKEN
POWER POLE NEAR 45TH AVENUE AND JACKSON
STREET. TIME ESTIMATED BY RADAR.
1106 AM TSTM WND DMG 1 ESE GARY 41.59N 87.32W
08/11/2026 LAKE IN PUBLIC
LARGE BRANCHES DOWNED, AT LEAST 1 TREE
UPROOTED IN THE PULASKI NEIGHBORHOOD.
1106 AM TSTM WND GST 1 SSE SOUTH CHICAGO 41.73N 87.54W
08/11/2026 M45 MPH COOK IL MESONET
CALUMET HARBOR PEAK GUST OF 39 KNOTS.
1107 AM TSTM WND GST 1 NNW CROWN POINT 41.43N 87.37W
08/11/2026 M70 MPH LAKE IN PUBLIC
PRIVATE WEATHER STATION.
1107 AM TSTM WND DMG 1 NNE MERRILLVILLE 41.48N 87.32W
08/11/2026 LAKE IN DEPT OF HIGHWAYS
IN-DOT REPORTS OVERTURNED SEMI ON I-65
SOUTHBOUND JUST NORTH OF MILE MARKER 253.
RELAYED BY BROADCAST MEDIA. TIME ESTIMATED
BY RADAR.
1107 AM TSTM WND DMG 2 NW LAKE STATION 41.60N 87.27W
08/11/2026 LAKE IN TRAINED SPOTTER
SEVERAL TREES UPROOTED.
1108 AM TSTM WND DMG HOBART 41.53N 87.26W
08/11/2026 LAKE IN PUBLIC
VIDEO SHARED TO SOCIAL MEDIA SHOWS EVERGREEN
UPROOTED ONTO POWER LINE IN HOBART. A FEW
OTHER LARGE BRANCHES DOWNED IN VICINITY.
TIME ESTIMATED BY RADAR.
1109 AM HAIL 1 ENE LAKES OF THE FOUR 41.42N 87.20W
08/11/2026 M1.00 INCH PORTER IN PUBLIC
RELAYED BY MEDIA.
1109 AM TSTM WND DMG 6 WSW HEBRON 41.29N 87.30W
08/11/2026 LAKE IN DEPT OF HIGHWAYS
IN-DOT REPORTS OVERTURNED SEMI ON I-65
NORTHBOUND NEAR MILE MARKER 240 EAST OF
LOWELL. RELAYED BY BROADCAST MEDIA. TIME
ESTIMATED BY RADAR.
1109 AM TSTM WND DMG 1 NW LAKES OF THE FOUR 41.42N 87.24W
08/11/2026 LAKE IN PUBLIC
PHOTO SHARED OF A LARGE TREE UPROOTED. TIME
ESTIMATED BY RADAR.
1109 AM TSTM WND GST GARY AIRPORT 41.62N 87.41W
08/11/2026 M99 MPH LAKE IN AWOS
PEAK GUST OF 86 KT OR 99 MPH MEASURED AT
GARY AIRPORT TOWER.
1109 AM TSTM WND DMG LAKES OF THE FOUR SEASO 41.41N 87.22W
08/11/2026 LAKE IN PUBLIC
NUMEROUS PHOTOS SHARED VIA SOCIAL MEDIA SHOW
LARGE BRANCHES DOWNED AT LAKES OF THE FOUR
SEASONS. A FEW TREES POSSIBLY UPROOTED. TIME
ESTIMATED BY RADAR.
1109 AM TSTM WND GST 1 W OAK LAWN 41.72N 87.77W
08/11/2026 M70 MPH COOK IL PUBLIC
1110 AM TSTM WND DMG LAKE STATION 41.58N 87.25W
08/11/2026 LAKE IN TRAINED SPOTTER
EXTENSIVE TREE DAMAGE IN AND NEAR LAKE
STATION WITH NUMEROUS TREES DOWNED. A SEMI
TRUCK WAS ALSO OVERTURNED ON I-80.
1110 AM TSTM WND DMG 2 NW LAKE STATION 41.60N 87.28W
08/11/2026 LAKE IN BROADCAST MEDIA
*** 1 FATAL ***
LOCAL BROADCAST MEDIA REPORTED THAN AN
UNHOUSED WOMAN WAS STRUCK BY ROOFING DEBRIS
AND KILLED DURING THE DERECHO. THE INCIDENT
WAS FIRST REPORTED AT 12:15 PM. BASED ON
RADAR, THE TIME OF THE EVENT PROBABLY
OCCURRED CLOSER TO 11:10 AM.
1112 AM TSTM WND DMG HEBRON 41.32N 87.20W
08/11/2026 PORTER IN PUBLIC
MULTIPLE PUBLIC REPORTS OF TREES DOWNED IN
AND NEAR HEBRON.
1113 AM TSTM WND DMG 2 SSW OGDEN DUNES 41.60N 87.21W
08/11/2026 PORTER IN PUBLIC
DRONE IMAGERY SHARED VIA SOCIAL MEDIA SHOWS
WIDESPREAD TREE DAMAGE AT LAKESHORE RESORT
CAMPGROUND. NUMEROUS TREES WITH LARGE
BRANCHES BROKEN, SEVERAL TREES UPROOTED OR
SNAPPED. MULTIPLE INSTANCES OF FALLEN TREE
TRUNKS CAUSING SIGNIFICANT DAMAGE TO CAMPERS
AND MOBILE HOMES. TIME ESTIMATED BY RADAR.
1115 AM TSTM WND DMG SOUTH HAVEN 41.54N 87.13W
08/11/2026 PORTER IN PUBLIC
NUMEROUS TREES DOWNED ACROSS SOUTH HAVEN.
1115 AM TSTM WND DMG ROSELAWN 41.16N 87.29W
08/11/2026 NEWTON IN TRAINED SPOTTER
LARGE LIMBS DOWN.
1115 AM FLOOD 2 SW SAUK VILLAGE 41.47N 87.59W
08/11/2026 WILL IL EMERGENCY MNGR
ESTIMATE OF 1 FOOT STANDING WATER OVER
ROADWAY.
1116 AM TSTM WND DMG 1 W VALPARAISO 41.47N 87.08W
08/11/2026 PORTER IN EMERGENCY MNGR
NUMEROUS LIMBS AND BRANCHES DOWN IN AREA.
1116 AM TSTM WND DMG PORTAGE 41.58N 87.18W
08/11/2026 PORTER IN TRAINED SPOTTER
NUMEROUS POWER POLES AND TREES DOWN.
1117 AM TSTM WND DMG 1 SSE VALPARAISO 41.46N 87.05W
08/11/2026 PORTER IN PUBLIC
PHOTO ON SOCIAL MEDIA SHOWED A LARGE TREE
LIMB AND POWER LINES DOWN NEAR COLLEGE
AVENUE AND UNION STREET.
1117 AM TSTM WND GST 2 NNW MAZON 41.27N 88.44W
08/11/2026 M65 MPH GRUNDY IL PUBLIC
PRIVATE WEATHER STATION: 2.4 NNW MAZON.
1118 AM TSTM WND DMG 1 ESE CHESTERTON 41.61N 87.05W
08/11/2026 PORTER IN EMERGENCY MNGR
TREE DOWN ACROSS PORTER AVE, BLOCKING
ROADWAY.
1118 AM TSTM WND DMG CHESTERTON 41.61N 87.05W
08/11/2026 PORTER IN EMERGENCY MNGR
LARGE TREE SNAPPED AT BASE, BLOCKING
ROADWAY.
1120 AM TSTM WND DMG 4 SE CHESTERTON 41.57N 87.02W
08/11/2026 PORTER IN PUBLIC
VIDEO SHARED TO SOCIAL MEDIA SHOWS
WIDESPREAD TREE DAMAGE ALONG 250 EAST ROAD
NORTH OF TRATEBAS ROAD. ROADWAY BLOCKED IN
MULTIPLE AREAS DUE TO LARGE BRANCHES DOWNED
AND A FEW TREES UPROOTED. TIME ESTIMATED BY
RADAR.
1120 AM TSTM WND GST 1 NE DEMOTTE 41.21N 87.18W
08/11/2026 M60 MPH JASPER IN AMATEUR RADIO
1120 AM TSTM WND DMG WOODLAWN - CHICAGO 41.77N 87.60W
08/11/2026 COOK IL PUBLIC
LARGE 9 INCH DIAMETER TREE BRANCHES DOWN ON
ROAD.
1123 AM TSTM WND GST 1 W DUNE ACRES 41.65N 87.10W
08/11/2026 M60 MPH PORTER IN PUBLIC
PRIVATE WEATHER STATION.
1123 AM TSTM WND DMG 7 SE CHESTERTON 41.55N 86.95W
08/11/2026 PORTER IN EMERGENCY MNGR
WIDESPREAD TREE DAMAGE ALONG AND NEAR ROUTE
6 WEST OF THE PORTER-LAPORTE COUNTY LINE.
1123 AM TSTM WND GST 2 NNE WILMINGTON 41.34N 88.13W
08/11/2026 M61 MPH WILL IL PUBLIC
WEATHER STATION AT MIDEWIN TALLGRASS
PRAIRIE.
1130 AM TSTM WND GST 4 N BEVERLY SHORES 41.76N 86.97W
08/11/2026 M50 MPH LMZ745 IN BUOY
GUST TO 43 KNOTS AT THE MICHIGAN CITY BUOY.
1130 AM FLOOD LAKE VILLAGE 41.14N 87.45W
08/11/2026 NEWTON IN PUBLIC
UP TO 3 INCHES STANDING WATER ON ROADWAYS.
1134 AM TSTM WND GST 4 NE BEVERLY SHORES 41.73N 86.93W
08/11/2026 M75 MPH LMZ745 IN C-MAN STATION
GUST TO 65 KNOTS AT THE MICHIGAN CITY GLERL
SITE.
1140 AM TSTM WND GST 4 NNE BEVERLY SHORES 41.75N 86.94W
08/11/2026 M45 MPH LMZ745 IN PUBLIC
MICHIGAN CITY BUOY PEAK GUST OF 39 KT.
1140 AM TSTM WND DMG 1 ENE PORTAGE 41.58N 87.17W
08/11/2026 PORTER IN TRAINED SPOTTER
REPORT OF A SNAPPED TRANSFORMER.
1140 AM RAIN 1 NNE PARK FOREST 41.49N 87.68W
08/11/2026 M2.21 INCH COOK IL COCORAHS
IN PAST 75 MINUTES, LIGHT RAIN ONGOING.
0203 PM TSTM WND DMG 2 WSW PAXTON 40.45N 88.13W
08/11/2026 FORD IL EMERGENCY MNGR
DOWNED TREE LIMBS ALONG ROUTE 9 WEST OF
PAXTON NEAR THE AIRPORT. TIME ESTIMATED BY
RADAR.
0305 PM SEICHE 2 NNE EAST CHICAGO 41.67N 87.44W
08/11/2026 LAKE IN PUBLIC
USGS RIVER GAUGE AT INDIANA HARBOR CANAL
RECORDED WATER LEVEL FLUCTUATIONS UP TO 2.4
FEET NEAR APPROXIMATELY 30 MINUTES APART.
POSSIBLE METEOTSUNAMI.
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