A mesoscale convective complex moved southeast across the area, mainly along and east of Mississippi River. There were numerous reports of damaging winds, large hail, flash flooding and even a tornado with some of these storms.

Thunderstorm Wind in MONROE, ILLINOIS
From 28-JUN-18 18:53:00 to 28-JUN-18 18:53:00 (CST-6)
Location: MAEYSTOWN
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down several trees around town.

Flash Flood in ST. CLAIR, ILLINOIS
From 28-JUN-18 18:30:00 to 28-JUN-18 21:30:00 (CST-6)
Location: EAST ST LOUIS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Up to three inchees fell in a little over an hour, causing flash flooding. Numerous roads were flooded including Interstate 255 near Centreville, as well as, roads in the Freeburg and Mascoutah areas.

Flash Flood in RANDOLPH, ILLINOIS
From 28-JUN-18 19:15:00 to 29-JUN-18 00:30:00 (CST-6)
Location: GRIGGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Up to three inches of rain fell in less than an hour over portions of Randolph County. Numerous roads were flooded including County Road 18 just north northwest of Houston.

Thunderstorm Wind in JERSEY, ILLINOIS
From 28-JUN-18 15:59:00 to 28-JUN-18 15:59:00 (CST-6)
Location: FIELDON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down a tree across Illinois Route 16 just east northeast of Fieldon.

Thunderstorm Wind in MONTGOMERY, ILLINOIS
From 28-JUN-18 16:22:00 to 28-JUN-18 16:22:00 (CST-6)
Location: NOKOMIS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down a power pole in town.

Tornado in JERSEY, ILLINOIS
From 28-JUN-18 16:11:00 to 28-JUN-18 16:13:00 (CST-6)
Location: CHAUTAUQUA
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A NWS Damage Survey Team surveyed multiple areas across southern Jersey County. The survey team did find one area of concentrated damage just northwest of Elsah which it determined was caused by a brief EF-0 tornado. The tornado touched down about one quarter mile SSW of the Green Acres Road and Elsah Road intersection here 3 pine trees were blown over. The tornado then removed part of the roof from an out building on the west side of Elsah Road. Portions of the roof were found blown across Elsah Road to the southeast. The tornado then crossed Lake Drive just west of Red Bud Court where it twisted a road sign 180 degrees and snapped a number of trees near their base. The tornado continued southeast crossing Elsah Road near Joywood Drive where several trees were again snapped. The tornado dissipated shortly thereafter. The tornado was rated EF0 with max wind speeds of 80 MPH. The path length was 1.40 miles and a max path width of 50 yards. No injuries or deaths were reported with this tornado.

Thunderstorm Wind in MACOUPIN, ILLINOIS
From 28-JUN-18 16:23:00 to 28-JUN-18 16:23:00 (CST-6)
Location: CARLINVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds blew down a tree onto Illinois Route 4 on southeast side of town.

Thunderstorm Wind in JERSEY, ILLINOIS
From 28-JUN-18 16:26:00 to 28-JUN-18 16:26:00 (CST-6)
Location: DELHI
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down a tree onto Illinois Route 111 just southwest of Brighton.

Thunderstorm Wind in MADISON, ILLINOIS
From 28-JUN-18 16:50:00 to 28-JUN-18 17:00:00 (CST-6)
Location: GRANITE CITY
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm winds blew down numerous large trees, tree limbs and power lines in Granite City. Also, about 2 miles southeast of Madison, a 500 foot radio broadcast tower was knocked down.

Thunderstorm Wind in ST. CLAIR, ILLINOIS
From 28-JUN-18 16:58:00 to 28-JUN-18 17:07:00 (CST-6)
Location: HILLTOP
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A wide swath of damaging winds moved through St. Clair County. Numerous trees, tree limbs and power lines were blown down in Fairview Heights, Belleville, Swansea, and Scott  Air Force Base. On the southeast side of Fairview Heights, an apartment complex sustained minor roof damage from the thunderstorm winds.

Thunderstorm Wind in BOND, ILLINOIS
From 28-JUN-18 17:02:00 to 28-JUN-18 17:02:00 (CST-6)
Location: GREENVILLE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds blew down a large tree across some power lines.

Thunderstorm Wind in PIKE, ILLINOIS
From 28-JUN-18 15:30:00 to 28-JUN-18 15:30:00 (CST-6)
Location: PLEASANT HILL
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down a tree in town.

Thunderstorm Wind in CLINTON, ILLINOIS
From 28-JUN-18 17:07:00 to 28-JUN-18 17:25:00 (CST-6)
Location: AVISTON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A wide swath of damaging winds moved through Clinton County. Numerous trees, tree limbs and power lines were blown down in Aviston, Albers, Germantown, and Bartelso. In Aviston, part of the roof of a local restaurant was blown off.

Thunderstorm Wind in MARION, ILLINOIS
From 28-JUN-18 17:20:00 to 28-JUN-18 17:31:00 (CST-6)
Location: SANDOVAL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Thunderstorm winds blew down numerous tree limbs and several trees in Sandoval and Centralia.

Hail in RANDOLPH, ILLINOIS
From 28-JUN-18 18:32:00 to 28-JUN-18 18:32:00 (CST-6)
Location: PRAIRIE DU ROCHER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in MADISON, ILLINOIS
From 28-JUN-18 16:26:00 to 28-JUN-18 16:34:00 (CST-6)
Location: GODFREY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down several large trees, numerous tree limbs and power lines between Godfrey and the Alton area. One tree fell onto an unoccupied mobile home in Godfrey. In Alton, a tree fell onto a car and nearby home causing moderate damage to both. In another part of Alton, a large tree fell onto a garage destroying it.

Thunderstorm Wind in MADISON, ILLINOIS
From 28-JUN-18 16:41:00 to 28-JUN-18 17:02:00 (CST-6)
Location: WORDEN
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds blew down several trees, tree limbs and power lines in Worden, St. Jacob and Highland. In Worden, two large trees were completely uprooted. In Highland, several wooden fences were blown over.

Thunderstorm Wind in MADISON, ILLINOIS
From 28-JUN-18 16:50:00 to 28-JUN-18 16:55:00 (CST-6)
Location: EDWARDSVILLE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Thunderstorm winds blew down several large trees, tree limbs and power lines in Edwardsville and Glen Carbon.

Thunderstorm Wind in FAYETTE, ILLINOIS
From 28-JUN-18 16:48:00 to 28-JUN-18 17:15:00 (CST-6)
Location: RAMSEY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down numerous trees, tree limbs and power lines across the county. In Brownstown, a tree was blown down onto an unoccupied car causing major damage to the vehicle.

Thunderstorm Wind in WASHINGTON, ILLINOIS
From 28-JUN-18 17:10:00 to 28-JUN-18 17:30:00 (CST-6)
Location: VENEDY STATION
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A wide swath of damaging winds moved through Washington County. Numerous trees, tree limbs and power lines were blown down in Okawville, Nashville and Posen.

Thunderstorm Wind in ST. CLAIR, ILLINOIS
From 28-JUN-18 17:00:00 to 28-JUN-18 17:02:00 (CST-6)
Location: FAIRMONT CITY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew over a semi truck at the interchange of I-55 and Illinois Route 203. In Fairmont City, numerous large tree limbs were blown down around town.

Thunderstorm Wind in ADAMS, ILLINOIS
From 28-JUN-18 14:08:00 to 28-JUN-18 14:15:00 (CST-6)
Location: (UIN)QUINCY MUNI ARP
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorm winds blew down several large tree limbs on west side of Quincy and in Clayton area.