Two distinct severe storms crossed southern Illinois during the afternoon and evening. During the afternoon, an isolated severe storm tracked east across the Ohio River counties from near Cairo to near Metropolis and then the Golconda area. This storm produced swaths of quarter-size hail and a few damaging wind gusts. During the evening, a line of severe storms moved east across the Interstate 57 corridor from around Marion to the Mount Vernon area. Isolated large hail and damaging winds accompanied these storms. The storms formed along and ahead of a cold front that trailed southward from a low pressure system over the western Great Lakes. The air mass remained moderately unstable into the evening hours, when mixed-layer capes decreased to around 1000 j/kg. Effective bulk wind shear averaged around 35 knots in the evening.

Thunderstorm Wind in JEFFERSON, ILLINOIS
From 15-APR-23 18:58:00 to 15-APR-23 18:58:00 (CST-6)
Location: WALTONVILLE
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Employee

Trees were down and power was out. Winds were estimated over 60 mph.

Hail in ALEXANDER, ILLINOIS
From 15-APR-23 13:07:00 to 15-APR-23 13:07:00 (CST-6)
Location: OLIVE BRANCH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter-size hail was reported at Horseshoe Lake.

Hail in PULASKI, ILLINOIS
From 15-APR-23 13:40:00 to 15-APR-23 13:40:00 (CST-6)
Location: OLMSTED
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MASSAC, ILLINOIS
From 15-APR-23 14:02:00 to 15-APR-23 14:02:00 (CST-6)
Location: NEW COLUMBIA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel-size hail was also reported in the immediate vicinity, at Round Knob.

Hail in POPE, ILLINOIS
From 15-APR-23 14:22:00 to 15-APR-23 14:22:00 (CST-6)
Location: ROSEBUD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail accumulated several inches deep in southern Pope County between Golconda and Hamletsburg.

Hail in WILLIAMSON, ILLINOIS
From 15-APR-23 19:40:00 to 15-APR-23 19:40:00 (CST-6)
Location: CARTERVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JACKSON, ILLINOIS
From 15-APR-23 19:47:00 to 15-APR-23 19:47:00 (CST-6)
Location: CARBONDALE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WILLIAMSON, ILLINOIS
From 15-APR-23 19:57:00 to 15-APR-23 19:57:00 (CST-6)
Location: NEILSON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Dime-size hail was photographed by a trained spotter between the Crab Orchard National Wildlife Refuge and the Interstate 24 junction with I-57.

Thunderstorm Wind in PULASKI, ILLINOIS
From 15-APR-23 13:40:00 to 15-APR-23 13:40:00 (CST-6)
Location: OLMSTED
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several tree limbs were down around the town of Olmsted.

Thunderstorm Wind in MASSAC, ILLINOIS
From 15-APR-23 14:08:00 to 15-APR-23 14:08:00 (CST-6)
Location: ROUND KNOB
Magnitude: 56.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees and large limbs were down at Airport Road.