009
NWUS53 KLOT 192059
LSRLOT

Preliminary Local Storm Report...Summary
National Weather Service Chicago IL
359 PM CDT Tue Aug 19 2025

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

0835 PM     Flash Flood      1 WSW Gary Airport      41.61N 87.44W
08/18/2025                   Lake               IN   Public

            Multiple public reports on social media of
            basement flooding in East Chicago. Video
            shows nearby street and yard flooding.

0835 PM     Flash Flood      2 SSE Whiting           41.66N 87.48W
08/18/2025                   Lake               IN   Public

            US 20 closed due to flooding. Relayed via
            social media.

0841 PM     Flash Flood      1 SSE Whiting           41.66N 87.48W
08/18/2025                   Lake               IN   Emergency Mngr

            Indianapolis Blvd at 128th has about 3 feet
            of water and is being closed to traffic.

0930 PM     Flash Flood      Whiting                 41.69N 87.50W
08/18/2025                   Lake               IN   Local Official

            Combined sewer storage facility exceeded
            capacity and overflowed due to heavy
            rainfall. Relayed via broadcast media. Time
            estimated based upon nearby reports.

0930 PM     Flash Flood      1 WSW Whiting           41.68N 87.51W
08/18/2025                   Lake               IN   Local Official

            Multiple basements flooded in Hammond. Time
            estimated based upon nearby reports. Relayed
            via broadcast media.

0945 PM     Flash Flood      2 SSE Gary Airport      41.59N 87.40W
08/18/2025                   Lake               IN   Public

            Public reports of basement flooding in Gary.
            Time estimated based upon nearby reports.

0946 PM     Flash Flood      2 E Hammond             41.59N 87.46W
08/18/2025                   Lake               IN   Public

            Public report of basement flooding in
            Hessville neighborhood of Hammond near
            Morton Elementary.

1000 PM     Flash Flood      Whiting                 41.68N 87.50W
08/18/2025                   Lake               IN   Public

            Up to 3 feet of water on Indianapolis
            Boulevard from 120th to 129th and the areas
            of Dickey and Riley roads.

0633 PM     Flash Flood      2 NE Roscoe             42.44N 88.99W
08/18/2025                   Winnebago          IL   Public

            Report relayed from mPING of street
            flooding.

0725 PM     Flash Flood      2 E Rockton             42.46N 89.04W
08/18/2025                   Winnebago          IL   Public

            Public report of street flooding near
            Rockton Road and Dorr Road. Flooding
            extending into nearby yards.

0652 PM     Flash Flood      Lockport                41.59N 88.05W
08/18/2025                   Will               IL   Public

            Report relayed from mPING of street
            flooding.

0716 PM     Flash Flood      1 SE Lockport           41.58N 88.05W
08/18/2025                   Will               IL   Public

            Report relayed from mPING of street
            flooding.

0735 PM     Flash Flood      2 SE Lockport           41.57N 88.03W
08/18/2025                   Will               IL   Public

            Report relayed from mPING of street
            flooding.

0738 PM     Flash Flood      2 E Mokena              41.54N 87.84W
08/18/2025                   Will               IL   Public

            Report relayed from mPING of street
            flooding.

0755 PM     Flash Flood      2 NE Mokena             41.55N 87.85W
08/18/2025                   Will               IL   Public

            At least 6 inches of water in underpass
            under railroad tracks.

0900 PM     Flash Flood      3 NW Bolingbrook        41.73N 88.12W
08/18/2025                   Will               IL   NWS Employee

            1 to 1.5 feet of standing water at the
            intersection of Naper Blvd and 87th Street.
            Around 1 foot of water on roads encroaching
            on driveways in surrounding neighborhoods,
            and at least 6 inches of flowing water at
            Arlington and Riverwoods.

0910 PM     Flash Flood      Joliet                  41.53N 88.08W
08/18/2025                   Will               IL   Public

            Reports of standing or flowing water on many
            streets or intersections of Joliet.

1000 PM     Flash Flood      2 ENE Mokena            41.54N 87.84W
08/18/2025                   Will               IL   Public

            Up to 3 feet of water on roadway.

1241 AM     Flash Flood      2 E Mokena              41.54N 87.84W
08/19/2025                   Will               IL   Public

            Several reports from mPing of flooded and
            closed roads in Mokena.

0600 PM     Flash Flood      Compton                 41.69N 89.09W
08/18/2025                   Lee                IL   Public

            Video shared to social media shows several
            inches of flowing water on roadways and a
            parking lot in Compton.

0730 PM     Flash Flood      1 N Paw Paw             41.71N 88.98W
08/18/2025                   Lee                IL   Public

            Report on social media of Paw Paw Road
            flooded approximately half mile north of Paw
            Paw. Possibly near creek crossing at Dredge
            Road.

0730 PM     Flash Flood      1 NW La Salle           41.34N 89.10W
08/18/2025                   La Salle           IL   Public

            Report relayed from mPING of street
            flooding.

0800 PM     Flash Flood      2 SE Yorkville          41.62N 88.43W
08/18/2025                   Kendall            IL   Public

            Street flooded with at least 6 inches of
            standing water.

0809 PM     Flash Flood      1 S Oswego              41.67N 88.36W
08/18/2025                   Kendall            IL   Public

            Report relayed from mPING of street
            flooding.

0535 PM     Flash Flood      2 NNE Woodridge         41.78N 88.04W
08/18/2025                   DuPage             IL   NWS Employee

            In Downers Grove, 6-8 inches of water
            flowing over the road at Belmont near 59th
            Street.

0610 PM     Flash Flood      1 W Downers Grove       41.79N 88.02W
08/18/2025                   DuPage             IL   Public

            Report relayed from mPING of street
            flooding.

0625 PM     Flash Flood      1 NW Darien             41.76N 87.98W
08/18/2025                   DuPage             IL   Public

            Report on social media with photos showing
            4-6 inches of water on Washington Street in
            Darien, with flooding also impacting houses.

0836 PM     Flash Flood      1 E Downers Grove       41.79N 88.00W
08/18/2025                   DuPage             IL   Public

            Report relayed from mPING of street
            flooding.

0837 PM     Flash Flood      3 NW Bolingbrook        41.73N 88.10W
08/18/2025                   DuPage             IL   Public

            Report relayed from mPING of street
            flooding.

0910 PM     Flash Flood      1 SSE Naperville        41.76N 88.14W
08/18/2025                   DuPage             IL   Public

            1 to 2 feet of water reported on Gartner
            Road with vehicles stranded. Unclear exactly
            where on Garner Road this is occurring.

0640 PM     Flash Flood      3 E Paw Paw             41.69N 88.93W
08/18/2025                   De Kalb            IL   Public

            Video posted to social media shows at least
            a foot of flowing water over Chicago Road
            east of Paw Paw.

0741 PM     Flash Flood      2 S Orland Hills        41.57N 87.84W
08/18/2025                   Cook               IL   Public

            Report relayed from mPING of street
            flooding.

0807 PM     Flash Flood      1 SE Orland Hills       41.57N 87.83W
08/18/2025                   Cook               IL   Public

            Report relayed from mPING of street
            flooding.

0809 PM     Flash Flood      2 W Orland Hills        41.59N 87.88W
08/18/2025                   Cook               IL   Public

            Report relayed from mPING of street
            flooding.

0815 PM     Flash Flood      1 NE Tinley Park        41.59N 87.78W
08/18/2025                   Cook               IL   Public

            A few public reports of basement flooding in
            Tinley Park. Relayed via social media.
            Photos and videos show flooded roadways with
            at least several inches of flowing water in
            the vicinity. Time estimated based upon
            nearby reports.

0834 PM     Flash Flood      1 W Midlothian          41.63N 87.73W
08/18/2025                   Cook               IL   Public

            Report relayed from mPING of street
            flooding.

1000 PM     Flash Flood      Thornton                41.58N 87.62W
08/18/2025                   Cook               IL   Public

            2 lanes covered in water near the quarry on
            I294.

1244 AM     Flash Flood      2 S Orland Hills        41.57N 87.84W
08/19/2025                   Cook               IL   Public

            Several reports from from mPING of flooded
            streets.

0600 AM     Flash Flood      3 WNW Orland Park       41.63N 87.90W
08/19/2025                   Cook               IL   Law Enforcement

            143rd Street closed due to flooding near
            Creek Crossing Drive. Relayed via social
            media.

0600 AM     Flash Flood      3 WSW Orland Hills      41.58N 87.89W
08/19/2025                   Cook               IL   Law Enforcement

            Wolf Road flooded near 167th Street near
            Marley Creek crossing. Relayed via social
            media.


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