384
NWUS53 KLOT 111346
LSRLOT
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHICAGO IL
846 AM CDT TUE AUG 11 2026
.TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON
.DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.
..REMARKS..
0125 PM TSTM WND DMG 1 WSW ARLINGTON HEIGHTS 42.08N 87.99W
08/09/2026 COOK IL 911 CALL CENTER
SEVERAL REPORTS OF DOWNED TREES AND POWER
LINES IN ARLINGTON HEIGHTS.
0130 PM TSTM WND DMG 1 WSW MOUNT PROSPECT 42.06N 87.96W
08/09/2026 COOK IL 911 CALL CENTER
A FEW REPORTS OF DOWNED TREES, TREE LIMBS,
AND POWER LINES IN MOUNT PROSPECT. TIME
ESTIMATED.
0130 PM TSTM WND DMG MOUNT PROSPECT 42.07N 87.94W
08/09/2026 COOK IL TRAINED SPOTTER
6 INCH DIAMETER LIMB DOWN ON MAIN STREET.
0130 PM TSTM WND DMG ARLINGTON HEIGHTS 42.08N 87.98W
08/09/2026 COOK IL TRAINED SPOTTER
MULTIPLE 3-4 INCH DIAMETER LIMBS DOWN
BETWEEN SIGWALT AND SOUTH STREET ON DUNTON
AVENUE. TIME ESTIMATED.
0138 PM MARINE TSTM WIND 1 NE MONTROSE HARBOR 41.97N 87.63W
08/09/2026 M41 MPH LMZ741 IL MESONET
MEASURED AT XMTB.
0140 PM TSTM WND DMG 1 SE ELK GROVE VILLAGE 41.99N 87.98W
08/09/2026 COOK IL 911 CALL CENTER
LARGE TREE DOWNED ON POWER LINES. TIME
ESTIMATED FROM RADAR.
0140 PM TSTM WND DMG 1 SSW EDGEWATER - CHICA 41.98N 87.67W
08/09/2026 COOK IL BROADCAST MEDIA
VIDEO SHOWED TREES DOWN IN ANDERSONVILLE.
0144 PM MARINE TSTM WIND 3 NE NAVY PIER 41.92N 87.57W
08/09/2026 M44 MPH LMZ741 IL C-MAN STATION
0155 PM FLOOD ITASCA 41.98N 88.00W
08/09/2026 DUPAGE IL LAW ENFORCEMENT
REPORTS OF VEHICLES STUCK IN FLOODED
ROADWAYS.
0155 PM FLOOD ADDISON 41.93N 87.99W
08/09/2026 DUPAGE IL LAW ENFORCEMENT
STREET FLOODING REPORTED THROUGHOUT TOWN.
0206 PM HAIL 3 W NAPERVILLE 41.76N 88.21W
08/09/2026 E1.00 INCH DUPAGE IL PUBLIC
REPORT FROM MPING: QUARTER (1.00 IN.).
0210 PM HAIL 1 N NAPERVILLE 41.79N 88.15W
08/09/2026 E0.75 INCH DUPAGE IL PUBLIC
REPORT FROM MPING: DIME (0.75 IN.).
0210 PM HAIL 2 W NAPERVILLE 41.78N 88.18W
08/09/2026 M0.75 INCH DUPAGE IL PUBLIC
REPORT FROM MPING: DIME (0.75 IN.).
0211 PM HAIL 2 W NAPERVILLE 41.79N 88.19W
08/09/2026 E1.00 INCH DUPAGE IL PUBLIC
REPORT FROM MPING: QUARTER (1.00 IN.).
0230 PM TSTM WND DMG 1 ENE HUMBOLDT PARK - C 41.90N 87.71W
08/09/2026 COOK IL BROADCAST MEDIA
LARGE TREE BRANCH DOWNED ONTO VEHICLE IN
HUMBOLDT PART COMMUNITY AREA OF CHICAGO.
TIME ESTIMATED BY RADAR.
0230 PM FLOOD DOWNERS GROVE 41.79N 88.01W
08/09/2026 DUPAGE IL PUBLIC
A FEW INCHES OF FLOWING WATER THROUGH YARDS
IN DOWNERS GROVE.
0230 PM FLOOD 1 SSW LAKEVIEW - CHICAG 41.94N 87.66W
08/09/2026 COOK IL PUBLIC
A FEW INCHES OF STANDING WATER AT N. RACINE
AND W. WELLINGTON AVENUES. RELAYED VIA
SOCIAL MEDIA.
0232 PM FLOOD NAPERVILLE 41.77N 88.15W
08/09/2026 DUPAGE IL NWS EMPLOYEE
8-12 INCHES OF WATER ON THE ROAD AT CHICAGO
AND WASHINGTON IN DOWNTOWN NAPERVILLE. WATER
ON WASHINGTON STREET HEADING SOUTH.
0234 PM FLOOD 1 SSE NAPERVILLE 41.76N 88.14W
08/09/2026 DUPAGE IL NWS EMPLOYEE
IMPASSABLE INTERSECTION AT GARTNER ROAD AND
WASHINGTON DUE TO FLOWING WATER IN EXCESS OF
6 INCHES.
0240 PM FLOOD 1 NW ARCHER HTS. - CHIC 41.82N 87.74W
08/09/2026 COOK IL BROADCAST MEDIA
VIDEO SHOWS SEVERAL INCHES OF STANDING WATER
ON I-55 STEPHENSON EXPRESSWAY. TIME
ESTIMATED.
0240 PM FLOOD 1 NW FOREST VIEW 41.82N 87.80W
08/09/2026 COOK IL PUBLIC
VIDEO SHARED TO SOCIAL MEDIA SHOWS A FEW
INCHES OF STANDING WATER ON HARLEM AVENUE
BETWEEN LYONS AND FOREST VIEW.
0257 PM TSTM WND DMG 1 S LEMONT 41.66N 88.00W
08/09/2026 COOK IL 911 CALL CENTER
UPDATES PREVIOUS TSTM WND DMG REPORT FROM 1
S LEMONT. MULTIPLE LARGE TREES AND TREE
LIMBS DOWNED BLOCKING MULTIPLE ROADWAYS IN
LEMONT. MOST OF THE DAMAGE OCCURRED BETWEEN
TIMBERLINE DRIVE AND HILLVIEW DRIVE NEAR
PEIFFER AVENUE. TIME ESTIMATED BY RADAR.
0300 PM FLOOD EVERGREEN PARK 41.72N 87.70W
08/09/2026 COOK IL PUBLIC
VIDEO SHARED TO SOCIAL MEDIA SHOWS SEVERAL
INCHES OF STANDING WATER ON A ROADWAY IN
EVERGREEN PARK.
0300 PM FLOOD 1 W OAK LAWN 41.71N 87.77W
08/09/2026 COOK IL PUBLIC
PHOTO SHARED OF A FEW INCHES OF STANDING
WATER ON MANSFIELD BETWEEN 97TH AND 99TH.
TIME ESTIMATED.
0313 PM TSTM WND DMG 1 S POSEN 41.62N 87.68W
08/09/2026 COOK IL PUBLIC
CORRECTS TIME OF PREVIOUS TSTM WND DMG
REPORT FROM 1 S POSEN. TREES DOWNED ON 149TH
STREET IN POSEN. TIME ESTIMATED FROM RADAR.
0323 PM TSTM WND DMG 1 SW HAMMOND 41.57N 87.51W
08/09/2026 LAKE IN PUBLIC
PHOTOS SHARED ON SOCIAL MEDIA OF NUMEROUS
LARGE TREES SNAPPED NEAR I-94 AND STATE
LINE.
0330 PM FLOOD 1 SE OAK LAWN 41.71N 87.74W
08/09/2026 COOK IL PUBLIC
PHOTO SHARED VIA SOCIAL MEDIA SHOWS A FEW
INCHES OF STANDING WATER IN PARKING LOTS AND
ON ROADWAYS NEAR CICERO AVENUE AND 103RD
STREET.
0330 PM MARINE TSTM WIND 4 N BEVERLY SHORES 41.75N 86.97W
08/09/2026 M64 MPH LMZ745 IN BUOY
MEASURED AT THE MICHIGAN CITY BUOY 45170.
0336 PM MARINE TSTM WIND 2 NNE BEVERLY SHORES 41.72N 86.96W
08/09/2026 M70 MPH LMZ745 IN C-MAN STATION
MEASURED AT THE MICHIGAN CITY GLERL SITE.
0400 PM FLOOD 1 ESE WOODRIDGE 41.75N 88.03W
08/09/2026 DUPAGE IL PUBLIC
VIDEO SHARED TO SOCIAL MEDIA SHOWS SEVERAL
INCHES OF STANDING WATER ON ONE LANE AND AN
ONRAMP OF NORTHBOUND I-355 AT 75TH STREET.
0600 PM FLOOD 1 W BURNS HARBOR 41.61N 87.14W
08/09/2026 PORTER IN DEPT OF HIGHWAYS
WEBCAM IMAGES FROM THE INDIANA DEPARTMENT OF
TRANSPORTATION SHOWED STANDING WATER IN A
LOW LYING SPOT OF I-94 AT THE SALT CREEK
CROSSING. THEY ALSO SHOWED WATER COVERING
WEST NORTH BOO ROAD WEST OF IN-149.
1002 PM TORNADO 5 E AMBOY 41.71N 89.24W
08/09/2026 LEE IL NWS STORM SURVEY
THE TORNADO BEGAN AROUND 10:02 PM AND LASTED
APPROXIMATELY 22 MINUTES, DISSIPATING AT
AROUND 10:24 PM. THE PEAK ESTIMATED WINDS
WERE AROUND 90 MPH. PATH LENGTH WAS NEARLY 7
MILES.
1002 PM TSTM WND DMG 5 N SUBLETTE 41.71N 89.24W
08/09/2026 LEE IL LAW ENFORCEMENT
LEE COUNTY SHERIFFS OFFICE REPORTS TREE
BRANCHES DOWNED NEAR SHAW ROAD AND INLET
ROAD. POSSIBLE TORNADO. TIME ESTIMATED BY
RADAR.
1018 PM TSTM WND DMG 5 NW WEST BROOKLYN 41.74N 89.21W
08/09/2026 LEE IL LAW ENFORCEMENT
LEE COUNTY SHERIFFS OFFICE REPORTS TREES OR
TREE BRANCHES UP TO 2 FEET IN DIAMETER
DOWNED ACROSS MULTIPLE ROADWAYS BETWEEN SHAW
ROAD AND US-30 EAST OF AMBOY AND LEE CENTER.
POSSIBLE TORNADO. TIME ESTIMATED BY RADAR.
1050 PM RAIN 5 SE ASHTON 41.80N 89.16W
08/09/2026 M3.33 INCH LEE IL PUBLIC
PRIVATE WEATHER STATION REPORTED 3.33 INCHES
OF RAIN SINCE 8:30 PM.
1103 PM HAIL VERNON HILLS 42.24N 87.97W
08/09/2026 M1.00 INCH LAKE IL TRAINED SPOTTER
TRAINED SPOTTER REPORTS QUARTER SIZE HAIL
ONGOING IN VERNON HILLS.
1116 PM TORNADO 3 NNE STREATOR 41.16N 88.82W
08/09/2026 LA SALLE IL NWS STORM SURVEY
AN EF-1 TORNADO HAS BEEN CONFIRMED NORTH OF
STREATOR. THIS TORNADO TRACK COMPLETED A
LOOP WITH A PATH LENGTH OF APPROXIMATELY 5
MILES.
1244 AM TSTM WND DMG 2 NE CORNELL 41.01N 88.70W
08/10/2026 LIVINGSTON IL PUBLIC
MULTIPLE TREES DAMAGED NORTHEAST OF CORNELL.
TIME AND LOCATION ESTIMATED.
1245 AM TSTM WND DMG EMINGTON 40.97N 88.36W
08/10/2026 LIVINGSTON IL BROADCAST MEDIA
POWER LINES DOWNED IN EMINGTON. TIME
ESTIMATED FROM RADAR.
0100 AM FLASH FLOOD DWIGHT 41.09N 88.43W
08/10/2026 LIVINGSTON IL PUBLIC
MULTIPLE REPORTS OF STREET AND BASEMENT
FLOODING IN DWIGHT. TIME ESTIMATED.
0100 AM TSTM WND GST 1 NW ODELL 41.01N 88.54W
08/10/2026 M52 MPH LIVINGSTON IL PUBLIC
PRIVATE WEATHER STATION REPORTED 52 MPH GUST
NEAR ODELL.
0104 AM RAIN 5 SSE KINSMAN 41.13N 88.52W
08/10/2026 M3.20 INCH GRUNDY IL PUBLIC
PRIVATE WEATHER STATION KILDWIGH8 REPORTED
3.2 INCHES OF RAINFALL SINCE 1120 PM. MOST
RAINFALL OCCURRED IN LESS THAN ONE HOUR
ENDING AT 1255 AM.
0110 AM TSTM WND DMG 5 SSW ODELL 40.94N 88.58W
08/10/2026 LIVINGSTON IL PUBLIC
MULTIPLE TREES DOWNED AT WOLF CREEK GOLF
COURSE. TIME ESTIMATED FROM RADAR.
0113 AM TSTM WND DMG ST. ANNE 41.03N 87.71W
08/10/2026 KANKAKEE IL PUBLIC
MULTIPLE TREES DOWNED IN ST. ANNE. TIME
ESTIMATED.
0121 AM TSTM WND DMG ASHKUM 40.88N 87.96W
08/10/2026 IROQUOIS IL BROADCAST MEDIA
LARGE TREE LIMBS DOWNED IN ASHKUM. TIME
ESTIMATED FROM RADAR.
0130 AM TSTM WND DMG DANFORTH 40.83N 87.98W
08/10/2026 IROQUOIS IL BROADCAST MEDIA
LARGE TREE LIMBS DOWNED IN DANFORTH. TIME
ESTIMATED FROM RADAR.
0139 AM TSTM WND DMG WATSEKA 40.78N 87.73W
08/10/2026 IROQUOIS IL BROADCAST MEDIA
TREES DOWNED IN WATSEKA. TIME ESTIMATED FROM
RADAR.
0145 AM TSTM WND DMG IROQUOIS 40.83N 87.58W
08/10/2026 IROQUOIS IL BROADCAST MEDIA
TREES DOWNED ONTO POWER LINES IN IROQUOIS.
TIME ESTIMATED FROM RADAR.
0148 AM TSTM WND DMG SHELDON 40.77N 87.56W
08/10/2026 IROQUOIS IL BROADCAST MEDIA
LARGE TREE LIMBS DOWNED IN SHELDON. TIME
ESTIMATED FROM RADAR.
0156 AM TSTM WND DMG MILFORD 40.63N 87.70W
08/10/2026 IROQUOIS IL BROADCAST MEDIA
ROOF SHINGLES PEELED OFF OF A HOUSE. TREE
DAMAGE ALSO REPORTED AT THE SAME PROPERTY.
TIME ESTIMATED FROM RADAR.
0200 AM RAIN 4 WNW DWIGHT 41.11N 88.50W
08/10/2026 M3.08 INCH GRUNDY IL PUBLIC
PRIVATE WEATHER STATION KILDWIGH3 REPORTED
3.08 INCHES OF RAIN SINCE 1115 PM.
0200 AM TSTM WND GST CLIFTON 40.94N 87.94W
08/10/2026 M59 MPH IROQUOIS IL PUBLIC
PRIVATE WEATHER STATION REPORTED 59 MPH GUST
AT CLIFTON.
0204 AM RAIN 3 WSW CABERY 40.98N 88.25W
08/10/2026 M2.29 INCH LIVINGSTON IL PUBLIC
PRIVATE WEATHER STATION KILCABER3 REPORTED
2.29 INCHES OF RAIN SINCE 1215 PM.
0205 AM RAIN 1 SSW DWIGHT 41.09N 88.43W
08/10/2026 M3.88 INCH LIVINGSTON IL PUBLIC
PRIVATE WEATHER STATION REPORTED 3.88 INCHES
OF RAINFALL AT DWIGHT. MOST RAINFALL
OCCURRED BETWEEN 1215 AM AND 100 AM.
0205 AM RAIN DWIGHT 41.09N 88.42W
08/10/2026 M4.91 INCH LIVINGSTON IL PUBLIC
PRIVATE WEATHER STATION REPORTED 4.91 INCHES
OF RAINFALL AT DWIGHT. MOST RAINFALL
OCCURRED BETWEEN 1215 AM AND 100 AM.
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