A strong storm system was approaching the region. Numerous storms developed ahead of the system during the late morning and afternoon hours on May 23rd.  There were numerous reports of damaging winds and large hail.

Thunderstorm Wind in ST. LOUIS, MISSOURI
From 23-MAY-11 11:30:00 to 23-MAY-11 11:30:00 (CST-6)
Location: BRENTWOOD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds blew down several large trees and tree limbs.

Thunderstorm Wind in LINCOLN, MISSOURI
From 23-MAY-11 11:18:00 to 23-MAY-11 11:18:00 (CST-6)
Location: WINFIELD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew some shingles off of a couple of roofs.  Also, a garage door was pushed in by the thunderstorm winds.

Thunderstorm Wind in MADISON, MISSOURI
From 23-MAY-11 14:18:00 to 23-MAY-11 14:18:00 (CST-6)
Location: MARQUAND
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm wind blew down a large tree onto State Highway M southwest of Marquand.

Hail in COLE, MISSOURI
From 23-MAY-11 09:54:00 to 23-MAY-11 09:54:00 (CST-6)
Location: ST MARTIN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in GASCONADE, MISSOURI
From 23-MAY-11 10:20:00 to 23-MAY-11 10:20:00 (CST-6)
Location: ELAND
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down some large tree limbs and tin off of a few roofs.

Thunderstorm Wind in GASCONADE, MISSOURI
From 23-MAY-11 10:35:00 to 23-MAY-11 10:35:00 (CST-6)
Location: HERMANN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Thunderstorm winds blew down a tree onto Highway 100 just east of Hermann.

Thunderstorm Wind in FRANKLIN, MISSOURI
From 23-MAY-11 10:40:00 to 23-MAY-11 10:40:00 (CST-6)
Location: BERGER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down several power lines in town.

Thunderstorm Wind in FRANKLIN, MISSOURI
From 23-MAY-11 10:35:00 to 23-MAY-11 10:35:00 (CST-6)
Location: GERALD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew off a few shingles on several houses in town.

Thunderstorm Wind in FRANKLIN, MISSOURI
From 23-MAY-11 10:50:00 to 23-MAY-11 10:50:00 (CST-6)
Location: UNION
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down numerous tree limbs and several large trees.  Also, a lumber company lost part of its roof.

Thunderstorm Wind in WARREN, MISSOURI
From 23-MAY-11 11:00:00 to 23-MAY-11 11:00:00 (CST-6)
Location: WRIGHT CITY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds blew part of the roof off of a mobile home.

Thunderstorm Wind in WARREN, MISSOURI
From 23-MAY-11 11:05:00 to 23-MAY-11 11:05:00 (CST-6)
Location: DUTZOW
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in ST. CHARLES, MISSOURI
From 23-MAY-11 11:11:00 to 23-MAY-11 11:11:00 (CST-6)
Location: GILMORE
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Thunderstorm Wind in ST. CHARLES, MISSOURI
From 23-MAY-11 11:12:00 to 23-MAY-11 11:12:00 (CST-6)
Location: WENTZVILLE
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in FRANKLIN, MISSOURI
From 23-MAY-11 11:10:00 to 23-MAY-11 11:10:00 (CST-6)
Location: ST ALBANS
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down several large trees.  A couple of the trees that were snapped were a foot in diameter.

Thunderstorm Wind in ST. LOUIS, MISSOURI
From 23-MAY-11 11:15:00 to 23-MAY-11 11:15:00 (CST-6)
Location: WINCHESTER
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down several large trees at Meadowbrook Country Club.

Thunderstorm Wind in ST. LOUIS, MISSOURI
From 23-MAY-11 11:20:00 to 23-MAY-11 11:20:00 (CST-6)
Location: TWIN OAKS
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down several large tree limbs and trees.  One lane of southbound Highway 141 was blocked by the fallen limbs and trees.

Thunderstorm Wind in ST. LOUIS, MISSOURI
From 23-MAY-11 11:30:00 to 23-MAY-11 11:30:00 (CST-6)
Location: CLAYTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down several large tree limbs.

Thunderstorm Wind in ST. LOUIS, MISSOURI
From 23-MAY-11 11:31:00 to 23-MAY-11 11:31:00 (CST-6)
Location: (STL)LAMBERT FLD ST
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Hail in ST. LOUIS, MISSOURI
From 23-MAY-11 11:32:00 to 23-MAY-11 11:32:00 (CST-6)
Location: TWIN OAKS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in ST. LOUIS, MISSOURI
From 23-MAY-11 11:44:00 to 23-MAY-11 11:44:00 (CST-6)
Location: SPANISH LAKE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down a large tree at the intersection of Highway 367 and Parker Road.

Thunderstorm Wind in ST. LOUIS (C), MISSOURI
From 23-MAY-11 11:35:00 to 23-MAY-11 11:45:00 (CST-6)
Location: TOWER GROVE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down numerous trees, tree limbs and power lines.  One twenty inch diameter tree and blocked traffic at Arsenal Street and Brannon Avenue.

Thunderstorm Wind in ST. LOUIS, MISSOURI
From 23-MAY-11 11:35:00 to 23-MAY-11 11:35:00 (CST-6)
Location: BEL NOR
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down a 30 inch diameter tree blocking the intersection of Normandy Avenue and Hillsdale Drive.

Thunderstorm Wind in GASCONADE, MISSOURI
From 23-MAY-11 10:25:00 to 23-MAY-11 10:25:00 (CST-6)
Location: OWENSVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Thunderstorm winds blew down several trees and power lines around town.  One tree fell onto an unoccupied car causing moderate damage.

Hail in REYNOLDS, MISSOURI
From 23-MAY-11 13:12:00 to 23-MAY-11 13:12:00 (CST-6)
Location: REDFORD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in GASCONADE, MISSOURI
From 23-MAY-11 10:30:00 to 23-MAY-11 10:30:00 (CST-6)
Location: ROSEBUD
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Thunderstorm winds uprooted several trees.  One tree was two feet in diameter.