Several rounds of thunderstorms moved across northeast Illinois during the afternoon and evening of September 27th producing torrential rain and widespread flash flooding.  Some of the thunderstorms also produced large hail and some wind damage.

Hail in WILL, ILLINOIS
From 27-SEP-19 17:45:00 to 27-SEP-19 17:45:00 (CST-6)
Location: PEOTONE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail in WILL, ILLINOIS
From 27-SEP-19 17:29:00 to 27-SEP-19 17:29:00 (CST-6)
Location: MANHATTAN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WILL, ILLINOIS
From 27-SEP-19 17:14:00 to 27-SEP-19 17:16:00 (CST-6)
Location: LORENZO
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in KANE, ILLINOIS
From 27-SEP-19 19:00:00 to 27-SEP-19 19:01:00 (CST-6)
Location: KANEVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in KANKAKEE, ILLINOIS
From 27-SEP-19 18:02:00 to 27-SEP-19 18:04:00 (CST-6)
Location: GRANT PARK
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Tennis ball size hail was reported on 11000 E just north of 9000 N.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 27-SEP-19 17:30:00 to 27-SEP-19 17:30:00 (CST-6)
Location: MANTENO
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several tents were blown down, including one 60 feet by 120 feet.  Tree limbs six inches in diameter were also blown down.

Hail in LIVINGSTON, ILLINOIS
From 27-SEP-19 14:05:00 to 27-SEP-19 14:06:00 (CST-6)
Location: LONG POINT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LIVINGSTON, ILLINOIS
From 27-SEP-19 14:17:00 to 27-SEP-19 14:17:00 (CST-6)
Location: BLACKSTONE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in WILL, ILLINOIS
From 27-SEP-19 15:15:00 to 27-SEP-19 15:15:00 (CST-6)
Location: RITCHIE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Two large tree limbs were blown down.

Flash Flood in KANKAKEE, ILLINOIS
From 27-SEP-19 20:30:00 to 28-SEP-19 00:45:00 (CST-6)
Location: MANTENO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

One foot of flowing water was reported at 9000 N and Sycamore Road due to flooding from the South Branch Rock Creek.

Flood in KANKAKEE, ILLINOIS
From 28-SEP-19 00:45:00 to 28-SEP-19 17:00:00 (CST-6)
Location: MANTENO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flooding from the South Branch Rock Creek continued at 9000 N and Sycamore Road on September 28th.

Flood in KANKAKEE, ILLINOIS
From 27-SEP-19 20:30:00 to 28-SEP-19 17:00:00 (CST-6)
Location: KANKAKEE RIVER PK AR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Rock Creek was out of its banks and flooded trails at the Kankakee Sportsmen Club.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 27-SEP-19 18:10:00 to 27-SEP-19 18:10:00 (CST-6)
Location: GRANT PARK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Two utility poles and a large diameter tree were blown down.

Flood in LA SALLE, ILLINOIS
From 28-SEP-19 00:30:00 to 29-SEP-19 12:00:00 (CST-6)
Location: (0C7) MENDOTA AIRPORT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

After flash flooding during the evening of September 27th, flood waters continued to slowly recede through the morning of September 29th.

Flash Flood in LA SALLE, ILLINOIS
From 27-SEP-19 17:00:00 to 28-SEP-19 00:30:00 (CST-6)
Location: SENECA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Video showed swiftly moving water with debris near Route 6 and Main Street in Seneca.

Flood in LIVINGSTON, ILLINOIS
From 27-SEP-19 13:25:00 to 27-SEP-19 15:30:00 (CST-6)
Location: PONTIAC
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A few roadways were barricaded due to standing water in Pontiac.

Flood in GRUNDY, ILLINOIS
From 28-SEP-19 00:30:00 to 29-SEP-19 12:00:00 (CST-6)
Location: NETTLECREEK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

After flash flooding during the evening of September 27th, flood waters continued to slowly recede through the morning of September 29th.

Flood in KENDALL, ILLINOIS
From 28-SEP-19 00:30:00 to 29-SEP-19 12:00:00 (CST-6)
Location: MILLINGTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

After flash flooding during the evening of September 27th, flood waters continued to slowly recede through the morning of September 29th.

Flood in WILL, ILLINOIS
From 28-SEP-19 00:45:00 to 29-SEP-19 12:00:00 (CST-6)
Location: TAMARACK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

After flash flooding during the evening of September 27th, flood waters continued to slowly recede through the morning of September 29th.

Flood in WILL, ILLINOIS
From 28-SEP-19 00:45:00 to 29-SEP-19 12:00:00 (CST-6)
Location: BRUNNING
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

After flash flooding during the evening of September 27th, flood waters continued to slowly recede through the morning of September 29th.

Flash Flood in COOK, ILLINOIS
From 27-SEP-19 20:00:00 to 28-SEP-19 00:45:00 (CST-6)
Location: LEMONT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash flooding occurred in many areas in southern Cook County.  Volmer Road was flooded and closed between Kedzie and Western near Olympia Fields.  Cars were submerged in a Metra Station parking lot near Flossmoor.  All lanes of Interstate 57 were flooded in an underpass near Matteson.  Storm total rainfall amounts included 6.75 inches in Park Forest; 6.73 inches one mile southwest of Country Club Hills; 6.36 inches one mile east southeast of Flossmoor; 5.91 inches in Flossmoor; 5.65 inches one mile north northeast of Park Forest; 4.72 inches in Lansing and 4.63 inches in Homewood.

Flash Flood in WILL, ILLINOIS
From 27-SEP-19 19:00:00 to 28-SEP-19 00:45:00 (CST-6)
Location: BRUNNING
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash flooding occurred in many areas of central and eastern Will County.  A water rescue occurred near Kennedy Road and Route 52 near the Will and Kankakee County line.  Numerous streets were flooded in Peotone with six inches or more of flowing water on portions of West Corning Avenue.  An observer in Peotone measured 1.25 inches of rain in 21 minutes.  Route 50 was closed between Peotone and Monee.  Wilmington-Peotone Road was closed in Peotone.  Near New Lenox, a car was submerged in flood waters near Cedar and Laraway.  A sink hole developed on Gougar Road, which was closed between Ellis and Spencer.  Delaney Road was closed at Cedar Road.  Another sink hole developed on Tulley Road between Kennedy Road and County Line Road in Wilton Township.  Numerous streets, backyards and basements were flooded in Frankfort.  Storm total rainfall amounts included 7.87 inches in Peotone; 6.52 inches in Manhattan; 6.08 inches three miles east northeast of Beecher; 5.93 inches two miles southeast of Manhattan; 5.27 inches three miles east northeast of New Lenox; 5.13 inches one mile west of Mokena and 4.33 inches three miles east of Crete.

Flash Flood in WILL, ILLINOIS
From 27-SEP-19 19:30:00 to 28-SEP-19 00:45:00 (CST-6)
Location: TAMARACK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash flooding occurred in many areas in western Will County.  In Romeoville, Weber Road was closed between Renwick and Airport Roads and Route 53 was closed between Renwick and Taylor Roads.  In Joliet, Theodore Street and Larkin Avenue was flooded.  Street flooding was reported near Onedia Street and Hammes Avenue.  In Crest Hill, Theodore Street at Gaylord Road was closed with 1 to 2 feet of flowing water.  Cars were submerged in flood waters near Caton Farm and County Line Roads.  Storm total rainfall amounts included 8.03 inches two miles south southeast of Channahon; 7.00 inches six miles northwest of Wilmington; 6.34 inches five miles northeast of Elwood; 5.55 inches one mile northeast of Channahon; 4.99 inches on the north side of Joliet; 4.90 inches one mile southeast of Lockport; 4.84 inches in Romeoville; 4.31 inches three miles east southeast of Plainfield and 4.04 inches two miles northwest of Homer Glen.

Flash Flood in KENDALL, ILLINOIS
From 27-SEP-19 19:30:00 to 28-SEP-19 00:30:00 (CST-6)
Location: MILLINGTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flash flooding occurred in many areas of central and southern Kendall County.  Interstate 80 was closed due to flooding near Minooka.  Storm total rainfall amounts included 5.25 inches five miles southwest of Plainfield and 3.12 inches five miles south southeast of Oswego.

Flash Flood in GRUNDY, ILLINOIS
From 27-SEP-19 19:30:00 to 28-SEP-19 00:30:00 (CST-6)
Location: NETTLECREEK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash flooding occurred in many areas of Grundy County.  Northeast of Morris, Hansel Road was closed between Ridge Road and McLindon Road.  Numerous streets were flooded in Morris.  Street flooding was reported near Carbon Hill.  Storm total rainfall amounts included 7.96 inches four miles north northwest of Coal City and 7.96 inches three miles north of Carbon Hill; 7.53 inches six miles east southeast of Morris; 6.52 inches three miles north of Coal City; 6.51 inches in Morris; 6.20 inches in Coal City; 5.71 inches in Minooka and 4.75 inches near Mazon.

Heavy Rain in LIVINGSTON, ILLINOIS
From 27-SEP-19 11:55:00 to 27-SEP-19 14:55:00 (CST-6)
Location: CAYUGA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Rainfall of 3.02 inches was measured in three hours at the Pontiac Municipal Airport with 2.01 inches falling in one hour.

Flood in LIVINGSTON, ILLINOIS
From 27-SEP-19 14:00:00 to 27-SEP-19 15:30:00 (CST-6)
Location: ROWE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Route 23 was flooded at 2300 N.

Flash Flood in LA SALLE, ILLINOIS
From 27-SEP-19 19:30:00 to 28-SEP-19 00:30:00 (CST-6)
Location: (0C7) MENDOTA AIRPORT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flash flooding occurred in many areas in La Salle County.  Significant flooding occurred in Seneca with mud from flood waters left in much of the city.  Basement flooding was also reported in Seneca.  North 3450th Road near the Fox River was completely washed out near Wedron.  Tractors were submerged in flood waters on Route 23 in Ottawa.  A creek was out of its banks near Pitstick Pavilion on Route 23, north of Ottawa.  Marquettes Gould Stadium was under water.  An access road for Dockside Bar & Grill was flooded in Ottawa.  Storm total rainfall amounts included 8.44 inches in Streator; 7.61 inches one mile north northeast of Seneca; 5.94 inches six miles north of Utica; 5.55 inches at the Marseilles Lock & Dam; 4.40 inches in Ottawa and 4.13 inches one miles east northeast of Peru.