An outflow boundary from convection that occurred during the early morning served as the focusing mechanism for additional severe thunderstorm development during the afternoon and evening of May 7th.  The storms initially focused along a Macomb...to Springfield...to Mount Vernon line and were very slow-moving in nature.  Due to a feed of highly unstable air characterized by CAPE values in excess of 3000J/kg, vigorous updrafts quickly developed and supported giant hail.  Hailstones as large as 3.25 inches in diameter were reported in the town of Chatham in Sangamon County, causing significant damage to homes and vehicles.  Numerous other thunderstorm cells produced hail larger than quarters, with the slow-movement of the cells causing some locations to report hail lasting for greater than 30 minutes.  As storms merged into a large cluster, the severe weather threat temporarily waned: however, flash flooding developed across southern portions of Sangamon and Christian counties as rainfall amounts of 4 to 6 inches were common across this area.  By early evening, a line of thunderstorms developed further north along a cold front across eastern Iowa into northern Illinois.  As the line sagged southward, damaging wind gusts of 60 to 70mph produced scattered wind damage along and north of a Canton to Bloomington line.

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 14:02:00 to 07-MAY-23 14:07:00 (CST-6)
Location: CHATHAM
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 14:02:00 to 07-MAY-23 14:07:00 (CST-6)
Location: CHATHAM
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in FULTON, ILLINOIS
From 07-MAY-23 18:00:00 to 07-MAY-23 18:05:00 (CST-6)
Location: MARIETTA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 18:05:00 to 07-MAY-23 18:10:00 (CST-6)
Location: CHATHAM
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in TAZEWELL, ILLINOIS
From 07-MAY-23 20:23:00 to 07-MAY-23 20:28:00 (CST-6)
Location: MACKINAW
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was blown across the road at the intersection of South Tazewell Street and West Madison Street.

Thunderstorm Wind in TAZEWELL, ILLINOIS
From 07-MAY-23 19:52:00 to 07-MAY-23 19:57:00 (CST-6)
Location: MORTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A power pole was leaning at the Colony South Apartments near South Main Street and East Idlewood Street in Morton.

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 14:04:00 to 07-MAY-23 14:09:00 (CST-6)
Location: CHATHAM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 14:09:00 to 07-MAY-23 14:14:00 (CST-6)
Location: AUBURN
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 17:29:00 to 07-MAY-23 17:34:00 (CST-6)
Location: CHATHAM
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 17:22:00 to 07-MAY-23 17:27:00 (CST-6)
Location: CHATHAM
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 14:10:00 to 07-MAY-23 14:15:00 (CST-6)
Location: CHATHAM
Magnitude: 3.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 14:14:00 to 07-MAY-23 14:19:00 (CST-6)
Location: AUBURN
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in FULTON, ILLINOIS
From 07-MAY-23 18:00:00 to 07-MAY-23 18:05:00 (CST-6)
Location: ELLISVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in FULTON, ILLINOIS
From 07-MAY-23 19:08:00 to 07-MAY-23 19:13:00 (CST-6)
Location: LEWISTOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 14:15:00 to 07-MAY-23 14:20:00 (CST-6)
Location: CHATHAM
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 14:25:00 to 07-MAY-23 14:30:00 (CST-6)
Location: CHATHAM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in FULTON, ILLINOIS
From 07-MAY-23 19:29:00 to 07-MAY-23 19:34:00 (CST-6)
Location: FARMINGTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A tree was blown down across IL-116 west of Farmington.

Thunderstorm Wind in FULTON, ILLINOIS
From 07-MAY-23 19:25:00 to 07-MAY-23 19:30:00 (CST-6)
Location: CANTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Two powerlines were blown down and one power pole was leaning.

Thunderstorm Wind in WOODFORD, ILLINOIS
From 07-MAY-23 19:48:00 to 07-MAY-23 19:53:00 (CST-6)
Location: EL PASO
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees and power lines were blown down in El Paso, resulting in power loss to half the city.

Thunderstorm Wind in TAZEWELL, ILLINOIS
From 07-MAY-23 19:57:00 to 07-MAY-23 20:02:00 (CST-6)
Location: MORTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Two 2.5-inch diameter tree branches were blown down.

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 14:30:00 to 07-MAY-23 14:35:00 (CST-6)
Location: CHATHAM
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 14:35:00 to 07-MAY-23 14:40:00 (CST-6)
Location: DIVERNON
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in PEORIA, ILLINOIS
From 07-MAY-23 19:36:00 to 07-MAY-23 19:41:00 (CST-6)
Location: ALTA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A few tree branches were blown down.

Thunderstorm Wind in KNOX, ILLINOIS
From 07-MAY-23 18:54:00 to 07-MAY-23 18:59:00 (CST-6)
Location: ABINGDON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several 6-inch diameter tree branches were blown down.

Thunderstorm Wind in TAZEWELL, ILLINOIS
From 07-MAY-23 19:55:00 to 07-MAY-23 20:00:00 (CST-6)
Location: WASHINGTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A large tree branch was blown down on Lynn Street.

Thunderstorm Wind in PEORIA, ILLINOIS
From 07-MAY-23 19:25:00 to 07-MAY-23 19:30:00 (CST-6)
Location: HANNA CITY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A tree was blown onto a house.

Thunderstorm Wind in PEORIA, ILLINOIS
From 07-MAY-23 19:20:00 to 07-MAY-23 19:25:00 (CST-6)
Location: ELMWOOD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tree limbs were blown onto powerlines on the west side of Elmwood.

Thunderstorm Wind in PEORIA, ILLINOIS
From 07-MAY-23 19:25:00 to 07-MAY-23 19:30:00 (CST-6)
Location: MAPLETON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A tree was blown over.

Thunderstorm Wind in TAZEWELL, ILLINOIS
From 07-MAY-23 19:48:00 to 07-MAY-23 19:53:00 (CST-6)
Location: TREMONT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree branch was blown down, damaging a house.

Thunderstorm Wind in MCLEAN, ILLINOIS
From 07-MAY-23 20:20:00 to 07-MAY-23 20:25:00 (CST-6)
Location: BLOOMINGTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree was blown down.

Thunderstorm Wind in MCLEAN, ILLINOIS
From 07-MAY-23 20:20:00 to 07-MAY-23 20:25:00 (CST-6)
Location: SHIRLEY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Several large tree limbs were blown down.

Thunderstorm Wind in MCLEAN, ILLINOIS
From 07-MAY-23 20:19:00 to 07-MAY-23 20:24:00 (CST-6)
Location: COVEL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree branch was snapped.

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 14:52:00 to 07-MAY-23 14:57:00 (CST-6)
Location: CIMIC
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CHRISTIAN, ILLINOIS
From 07-MAY-23 15:05:00 to 07-MAY-23 15:10:00 (CST-6)
Location: PALMER
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in KNOX, ILLINOIS
From 07-MAY-23 19:18:00 to 07-MAY-23 19:23:00 (CST-6)
Location: YATES CITY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A few tree branches were blown down.

Thunderstorm Wind in MARSHALL, ILLINOIS
From 07-MAY-23 19:20:00 to 07-MAY-23 19:25:00 (CST-6)
Location: HENRY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A few tree branches were blown down.

Hail in FULTON, ILLINOIS
From 07-MAY-23 19:08:00 to 07-MAY-23 19:13:00 (CST-6)
Location: LEWISTOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

High Wind in PEORIA, ILLINOIS
From 07-MAY-23 21:30:00 to 07-MAY-23 21:35:00 (CST-6)
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several trees were damaged near Bradley University due to winds gusting to around 60mph in the wake of a line of thunderstorms.

High Wind in TAZEWELL, ILLINOIS
From 07-MAY-23 21:45:00 to 07-MAY-23 21:50:00 (CST-6)
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A tree was blown down at the intersection of South Creve Coeur Avenue and Morton Street in Creve Coeur due to winds gusting to around 60mph in the wake of a line of thunderstorms.

High Wind in TAZEWELL, ILLINOIS
From 07-MAY-23 21:45:00 to 07-MAY-23 21:50:00 (CST-6)
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The roof of an apartment complex 2 miles southeast of Pekin was damaged due to winds gusting to around 60mph in the wake of a line of thunderstorms.

High Wind in LOGAN, ILLINOIS
From 07-MAY-23 22:45:00 to 07-MAY-23 22:50:00 (CST-6)
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Several large tree branches were blown down across Lincoln due to winds gusting to around 60mph in the wake of a line of thunderstorms.

Hail in FULTON, ILLINOIS
From 07-MAY-23 15:35:00 to 07-MAY-23 15:40:00 (CST-6)
Location: VERMONT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 15:36:00 to 07-MAY-23 15:41:00 (CST-6)
Location: LOAMI
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in TAZEWELL, ILLINOIS
From 07-MAY-23 19:50:00 to 07-MAY-23 19:55:00 (CST-6)
Location: PEKIN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was blown onto powerlines.

Thunderstorm Wind in WOODFORD, ILLINOIS
From 07-MAY-23 19:45:00 to 07-MAY-23 19:50:00 (CST-6)
Location: SPRING BAY
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The siding of a house was damaged.

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 15:56:00 to 07-MAY-23 16:01:00 (CST-6)
Location: CHATHAM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CHRISTIAN, ILLINOIS
From 07-MAY-23 15:57:00 to 07-MAY-23 16:02:00 (CST-6)
Location: MORRISONVILLE
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in TAZEWELL, ILLINOIS
From 07-MAY-23 19:55:00 to 07-MAY-23 20:00:00 (CST-6)
Location: GROVELAND
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A few tree branches were blown down.

Thunderstorm Wind in MCLEAN, ILLINOIS
From 07-MAY-23 20:00:00 to 07-MAY-23 20:01:00 (CST-6)
Location: HUDSON
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 13:59:00 to 07-MAY-23 14:04:00 (CST-6)
Location: CHATHAM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 15:59:00 to 07-MAY-23 16:04:00 (CST-6)
Location: NEW BERLIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in FULTON, ILLINOIS
From 07-MAY-23 16:03:00 to 07-MAY-23 16:08:00 (CST-6)
Location: ASTORIA
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in TAZEWELL, ILLINOIS
From 07-MAY-23 19:46:00 to 07-MAY-23 19:56:00 (CST-6)
Location: PEKIN
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were blown down in Pekin...including one that fell onto a house.

Thunderstorm Wind in TAZEWELL, ILLINOIS
From 07-MAY-23 19:58:00 to 07-MAY-23 20:03:00 (CST-6)
Location: VALLEY VIEW
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A powerline was blown down on Jay Street in East Peoria.

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 16:09:00 to 07-MAY-23 16:14:00 (CST-6)
Location: NEW BERLIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in SANGAMON, ILLINOIS
From 07-MAY-23 16:13:00 to 07-MAY-23 16:18:00 (CST-6)
Location: PAWNEE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in LOGAN, ILLINOIS
From 07-MAY-23 20:20:00 to 07-MAY-23 20:25:00 (CST-6)
Location: MIDDLETOWN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Powerlines were blown down and a power pole caught fire.

Thunderstorm Wind in TAZEWELL, ILLINOIS
From 07-MAY-23 20:08:00 to 07-MAY-23 20:13:00 (CST-6)
Location: LILLY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A power pole caught fire on Winkler Road northeast of Mackinaw.

Thunderstorm Wind in TAZEWELL, ILLINOIS
From 07-MAY-23 20:11:00 to 07-MAY-23 20:16:00 (CST-6)
Location: MACKINAW
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A powerline was blown down on 2nd Street.

Thunderstorm Wind in TAZEWELL, ILLINOIS
From 07-MAY-23 20:14:00 to 07-MAY-23 20:19:00 (CST-6)
Location: NORTH PEKIN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was blown down on North Main Street.

Thunderstorm Wind in WOODFORD, ILLINOIS
From 07-MAY-23 19:15:00 to 07-MAY-23 19:20:00 (CST-6)
Location: SPRING BAY
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were blown down.

Thunderstorm Wind in WOODFORD, ILLINOIS
From 07-MAY-23 19:24:00 to 07-MAY-23 19:29:00 (CST-6)
Location: METAMORA
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were blown down.

Thunderstorm Wind in MCLEAN, ILLINOIS
From 07-MAY-23 20:20:00 to 07-MAY-23 20:25:00 (CST-6)
Location: NORMAL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree was snapped at the base.

Thunderstorm Wind in WOODFORD, ILLINOIS
From 07-MAY-23 19:50:00 to 07-MAY-23 19:55:00 (CST-6)
Location: METAMORA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several large tree limbs were snapped.

Thunderstorm Wind in WOODFORD, ILLINOIS
From 07-MAY-23 20:00:00 to 07-MAY-23 20:05:00 (CST-6)
Location: SECOR
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The roof of a barn was damaged and a motorhome was flipped on its side.

Thunderstorm Wind in WOODFORD, ILLINOIS
From 07-MAY-23 20:12:00 to 07-MAY-23 20:17:00 (CST-6)
Location: EL PASO
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Part of a barn roof was torn off.

Flash Flood in SANGAMON, ILLINOIS
From 07-MAY-23 15:50:00 to 07-MAY-23 18:50:00 (CST-6)
Location: LOAMI
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 2.00K
Reported by: Trained Spotter

Water was flowing across East Loami Road.