An outflow boundary from earlier convection moved southward through region, triggering widespread storms. Some of the storms became severe with numerous reports of large hail, damaging winds and flash flooding.

Hail in ST. CHARLES, MISSOURI
From 19-JUN-21 16:10:00 to 19-JUN-21 16:10:00 (CST-6)
Location: ST CHARLES
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in PIKE, MISSOURI
From 19-JUN-21 16:55:00 to 19-JUN-21 17:35:00 (CST-6)
Location: FRANKFORD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A swath of one inch hail fell between Frankford and Bowling Green.

Thunderstorm Wind in LINCOLN, MISSOURI
From 19-JUN-21 13:55:00 to 19-JUN-21 13:58:00 (CST-6)
Location: ELSBERRY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Thunderstorm winds blew down a number of power lines around town.

Thunderstorm Wind in ST. CHARLES, MISSOURI
From 19-JUN-21 15:45:00 to 19-JUN-21 16:15:00 (CST-6)
Location: ST PETERS
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Widespread thunderstorm wind damage between St. Peters and Harvester. Numerous tree limbs were blown down, as well as power lines. Also, a garage door was bowed inward on a home in Cottleville.

Thunderstorm Wind in JEFFERSON, MISSOURI
From 19-JUN-21 17:10:00 to 19-JUN-21 17:14:00 (CST-6)
Location: HIGH RIDGE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds blew down several trees in the High Ridge and Byrnes Mill areas. A couple of the trees fell onto roadways blocking them.

Thunderstorm Wind in MARION, MISSOURI
From 19-JUN-21 17:16:00 to 19-JUN-21 17:16:00 (CST-6)
Location: WITHERS MILL
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds broke off a large section of a tree.

Thunderstorm Wind in PIKE, MISSOURI
From 19-JUN-21 17:40:00 to 19-JUN-21 17:40:00 (CST-6)
Location: ST CLEMENT
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Thunderstorm winds blew down several power lines across a road in Saint Clement.

Thunderstorm Wind in ST. CHARLES, MISSOURI
From 19-JUN-21 18:40:00 to 19-JUN-21 18:43:00 (CST-6)
Location: FLINT HILL
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds blew down several trees, as well as a street sign and lamp post.

Thunderstorm Wind in CALLAWAY, MISSOURI
From 19-JUN-21 20:15:00 to 19-JUN-21 20:16:00 (CST-6)
Location: CONCORD
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds blew down several large trees near the intersection of State Highway E and County Road 245, blocking the road. Also, between 5 and 6 power poles were blown down, as well as power lines.

Thunderstorm Wind in BOONE, MISSOURI
From 19-JUN-21 23:25:00 to 19-JUN-21 23:45:00 (CST-6)
Location: MC BAINE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Thunderstorm winds blew down numerous trees in the southwestern portions of Boone County.  Some of the trees fell across road blocking them including Old Plank Road, Campus Road, and Scott Blvd near intersection with Route K.

Thunderstorm Wind in WARREN, MISSOURI
From 19-JUN-21 20:30:00 to 19-JUN-21 20:30:00 (CST-6)
Location: WARRENTON O SLLVN AR
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds destroyed an old pole barn on the south side of I-70, between Warrenton and Wright City.

Flash Flood in RALLS, MISSOURI
From 19-JUN-21 18:00:00 to 19-JUN-21 22:30:00 (CST-6)
Location: SPALDING
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Up to five inches of rain fell in about a two hour period causing flash flooding. Numerous roads were flooded including Highway A in New London, U.S. Highway 61 south of New London, and the intersection of U.S. Highway 61 and Highway 19. Also, Highway 19 just southwest of Center and the intersection of Kingbird Lane and Highway F.

Flash Flood in BOONE, MISSOURI
From 19-JUN-21 21:05:00 to 20-JUN-21 01:13:00 (CST-6)
Location: STURGEON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Up to four inches of rain fell in about a two hour period across northern portions of Boone County causing flash flooding. Numerous roads were flooded including Highway 124 west northwest of Hallsville and several roads in Centralia.

Thunderstorm Wind in ST. CHARLES, MISSOURI
From 19-JUN-21 16:12:00 to 19-JUN-21 16:12:00 (CST-6)
Location: DARDENNE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down a couple of large tree limbs.

Thunderstorm Wind in AUDRAIN, MISSOURI
From 19-JUN-21 19:41:00 to 19-JUN-21 19:50:00 (CST-6)
Location: THOMPSON
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Thunderstorm winds blew down a 31 foot by 70 foot pole barn, with the debris blown south across the roadway two miles west northwest of Thompson. Also, several power lines were blown down between Thompson and the Audrain/Callaway County line.

Thunderstorm Wind in ST. LOUIS, MISSOURI
From 19-JUN-21 16:28:00 to 19-JUN-21 16:50:00 (CST-6)
Location: (SUS)SPIRIT/ST LOUIS
Magnitude: 67.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A wide swath of damaging winds was reported across the western portions of St. Louis County. A 77 mph wind gust was recorded at Spirit of St. Louis Airport at 528 pm. Numerous trees, tree limbs and power lines were blown down in Chesterfield, Wildwood, Ellisville, Clarkson Valley and Ballwin. A large tree was uprooted onto a house in Chesterfield causing moderate roof damage.