A severe weather outbreak occurred during the afternoon and early evening hours. An organized line of severe thunderstorms formed over the central Plains states during the night of the 20th. This bowing line of storms progressed southeast across the St. Louis area during the midday hours, then down across the lower Ohio Valley and southeast Missouri during the afternoon. Widespread wind damage was reported in parts of southern Illinois, especially in far southern areas from the Marion-Carbondale area southward to the Ohio River. Flash flooding was reported in a few locations. The atmosphere ahead of the storms became strongly unstable, with surface-based capes exceeding 4,000. Given the strong buoyancy, wind profiles were sufficiently strong for widespread severe weather. Deep-layer (0-6 km) wind shear values were no higher than about 30 knots, and 0-1 km shear was about 20 knots. Even though the region was under a broad 500 mb ridge, a moderately strong low-level feed of very moist and unstable air fueled the intense storms as they propagated southeastward.

Thunderstorm Wind in HAMILTON, ILLINOIS
From 21-JUN-19 13:44:00 to 21-JUN-19 13:44:00 (CST-6)
Location: BELL PRAIRIE CITY
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A mesonet site measured a wind gust to 59 mph.

Flash Flood in JACKSON, ILLINOIS
From 21-JUN-19 15:45:00 to 21-JUN-19 21:00:00 (CST-6)
Location: MURPHYSBORO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flooding was reported on Route 149 between Murphysboro and Desoto. Some roadways were reported flooded near Murphysboro.

Flash Flood in WILLIAMSON, ILLINOIS
From 21-JUN-19 18:36:00 to 21-JUN-19 21:00:00 (CST-6)
Location: MARION
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Significant creek flooding was reported near Crab Orchard Lake after 2.22 inches of rain fell in two hours. Reports of possible road closures were received along portions of Route 13.

Thunderstorm Wind in JEFFERSON, ILLINOIS
From 21-JUN-19 13:15:00 to 21-JUN-19 13:15:00 (CST-6)
Location: MT VERNON
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated the wind gusted to 60 mph. Power outages occurred.

Lightning in HARDIN, ILLINOIS
From 21-JUN-19 15:30:00 to 21-JUN-19 15:30:00 (CST-6)
Location: ROSICLARE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A 31-year-old man was struck by lightning while riding a lawn mower. He was hospitalized at a regional hospital with non life-threatening injuries.

Thunderstorm Wind in JACKSON, ILLINOIS
From 21-JUN-19 15:32:00 to 21-JUN-19 15:40:00 (CST-6)
Location: MURPHYSBORO
Magnitude: 52.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was down in Murphysboro. Tree limbs were down in Carbondale, including a large limb that fell on a house.

Thunderstorm Wind in JACKSON, ILLINOIS
From 21-JUN-19 15:40:00 to 21-JUN-19 15:40:00 (CST-6)
Location: MAKANDA
Magnitude: 56.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Two trees were covering Rocky Comfort Road.

Thunderstorm Wind in PULASKI, ILLINOIS
From 21-JUN-19 15:50:00 to 21-JUN-19 16:00:00 (CST-6)
Location: ULLIN
Magnitude: 65.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Damaging winds crossed parts of Pulaski County, downing numerous trees. A 48-year-old woman was killed when a tree fell onto her car as she was driving on Old U.S. Highway 51 about two miles south of Ullin. At Mounds, a teenage girl was seriously injured when a tree fell on her in a city park.

Thunderstorm Wind in WILLIAMSON, ILLINOIS
From 21-JUN-19 15:50:00 to 21-JUN-19 15:54:00 (CST-6)
Location: CARTERVILLE
Magnitude: 65.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Widespread damaging winds entered northwestern Williamson County. Trees were snapped in Herrin, causing power outages. A tree landed on a home. In Carterville, trees were blown down along Grand Avenue.

Thunderstorm Wind in JOHNSON, ILLINOIS
From 21-JUN-19 15:58:00 to 21-JUN-19 16:03:00 (CST-6)
Location: VIENNA
Magnitude: 65.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees were down around the county. Roads were blocked by fallen trees. At least one power pole was knocked down. Near Simpson, several oak trees from three to four feet in diameter were blown down.

Thunderstorm Wind in WILLIAMSON, ILLINOIS
From 21-JUN-19 16:00:00 to 21-JUN-19 16:10:00 (CST-6)
Location: JOHNSTON CITY
Magnitude: 65.00 EG
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Widespread damaging winds continued moving eastward across central and eastern Williamson County, including the city of Marion. Wind gusts were estimated from 60 to 75 mph. Numerous trees and tree limbs were blown down, causing power outages. In Johnston City, trees were down on a few vehicles and one home. The home did not sustain any structural damage, but gutters were damaged. At least 5,000 utility customers were without power.

Thunderstorm Wind in MASSAC, ILLINOIS
From 21-JUN-19 16:15:00 to 21-JUN-19 16:20:00 (CST-6)
Location: METROPOLIS
Magnitude: 65.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: NWS Employee

A semi was blown over on the Interstate 24 bridge over the Ohio River. Near Brookport, at least a half-dozen trees were snapped along the Ohio River.