An outflow boundary from convection earlier in the day served as the primary focusing mechanism for numerous storm clusters along and south of I-70 from the late afternoon  of August 1st into the pre-dawn hours of August 2nd.  Some of the storms dropped very large hail up to 2 inches in diameter.  In addition, continuous back-building cells produced a swath of heavy rainfall in excess of 8 inches from eastern Effingham County across Jasper County into northeastern Richland County.  As a result, many roads were closed due to flash flooding.  The flooding lingered until around midday on August 2nd, particularly in the hardest hit locations from Dietrich in Effingham County to Newton in Jasper County.

Flash Flood in JASPER, ILLINOIS
From 01-AUG-22 22:30:00 to 02-AUG-22 11:15:00 (CST-6)
Location: NEWTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Route 130 from Newton to West Liberty was closed due to flooding.  Several vehicles were swept off the road into ditches.

Hail in RICHLAND, ILLINOIS
From 01-AUG-22 15:58:00 to 01-AUG-22 16:03:00 (CST-6)
Location: OLNEY
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in RICHLAND, ILLINOIS
From 01-AUG-22 16:00:00 to 01-AUG-22 16:05:00 (CST-6)
Location: OLNEY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail in LAWRENCE, ILLINOIS
From 01-AUG-22 17:10:00 to 01-AUG-22 17:15:00 (CST-6)
Location: SUMNER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Flash Flood in LAWRENCE, ILLINOIS
From 01-AUG-22 18:00:00 to 01-AUG-22 21:00:00 (CST-6)
Location: HELENA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Water was flowing across the roadway.

Flash Flood in JASPER, ILLINOIS
From 01-AUG-22 21:50:00 to 02-AUG-22 11:15:00 (CST-6)
Location: WHEELER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

All roads out of Newton were flooded.

Flash Flood in LAWRENCE, ILLINOIS
From 01-AUG-22 18:40:00 to 01-AUG-22 21:40:00 (CST-6)
Location: CHAUNCEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water was flowing across the roadway at the intersection of Chauncey Road and Petty School Lane.

Hail in RICHLAND, ILLINOIS
From 01-AUG-22 19:30:00 to 01-AUG-22 19:35:00 (CST-6)
Location: CALHOUN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in RICHLAND, ILLINOIS
From 01-AUG-22 15:55:00 to 01-AUG-22 16:00:00 (CST-6)
Location: OLNEY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree was blown down on North East Street a few yards from Carle Richland Memorial Hospital.

Thunderstorm Wind in LAWRENCE, ILLINOIS
From 01-AUG-22 17:50:00 to 01-AUG-22 17:55:00 (CST-6)
Location: HELENA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A few three-foot diameter trees were snapped and blown over.

Flash Flood in CRAWFORD, ILLINOIS
From 01-AUG-22 21:28:00 to 02-AUG-22 00:28:00 (CST-6)
Location: OBLONG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water was flowing across the road west-northwest of Hardinville.

Flash Flood in EFFINGHAM, ILLINOIS
From 01-AUG-22 22:00:00 to 02-AUG-22 11:15:00 (CST-6)
Location: SHUMWAY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Numerous roads from Effingham to Dietrich were flooded, including Highway 33.  The Dietrich Apartments were flooded.  In addition, 20 homes in Dietrich were flooded...including 12 with water in their living areas.

Hail in EFFINGHAM, ILLINOIS
From 01-AUG-22 14:25:00 to 01-AUG-22 14:30:00 (CST-6)
Location: EFFINGHAM
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in EFFINGHAM, ILLINOIS
From 01-AUG-22 14:45:00 to 01-AUG-22 14:50:00 (CST-6)
Location: DIETERICH
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in JASPER, ILLINOIS
From 01-AUG-22 15:10:00 to 01-AUG-22 15:15:00 (CST-6)
Location: WHEELER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flash Flood in CLAY, ILLINOIS
From 02-AUG-22 00:55:00 to 02-AUG-22 03:55:00 (CST-6)
Location: XENIA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Two feet of water was flowing across Old Route 50 southwest of Flora.

Flash Flood in RICHLAND, ILLINOIS
From 01-AUG-22 17:30:00 to 01-AUG-22 20:30:00 (CST-6)
Location: PURETON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Route 250 was closed west of Olney due to flooding.

Hail in JASPER, ILLINOIS
From 01-AUG-22 15:31:00 to 01-AUG-22 15:36:00 (CST-6)
Location: SHAMROCK
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in JASPER, ILLINOIS
From 01-AUG-22 15:35:00 to 01-AUG-22 15:40:00 (CST-6)
Location: KEDRON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in JASPER, ILLINOIS
From 01-AUG-22 15:40:00 to 01-AUG-22 15:45:00 (CST-6)
Location: BOGOTA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in RICHLAND, ILLINOIS
From 01-AUG-22 15:40:00 to 01-AUG-22 15:45:00 (CST-6)
Location: DUNDAS
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Flash Flood in RICHLAND, ILLINOIS
From 01-AUG-22 17:30:00 to 01-AUG-22 20:30:00 (CST-6)
Location: PARKERSBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Water was flowing across Route 130 just north of Parkersburg.

Hail in RICHLAND, ILLINOIS
From 01-AUG-22 15:55:00 to 01-AUG-22 16:00:00 (CST-6)
Location: OLNEY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public