A warm front was lifting northward through the region, triggering numerous showers and thunderstorms.  Some of the storms produced tornadoes as well as a lot of large hail.  There were 6 tornadoes with this event, including an EF3.

Hail in GASCONADE, MISSOURI
From 19-APR-11 16:05:00 to 19-APR-11 16:05:00 (CST-6)
Location: PERSHING
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in GASCONADE, MISSOURI
From 19-APR-11 16:22:00 to 19-APR-11 16:22:00 (CST-6)
Location: HERMANN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LINCOLN, MISSOURI
From 19-APR-11 16:29:00 to 19-APR-11 16:29:00 (CST-6)
Location: TROY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LINCOLN, MISSOURI
From 19-APR-11 16:30:00 to 19-APR-11 16:32:00 (CST-6)
Location: MOSCOW MILLS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. CHARLES, MISSOURI
From 19-APR-11 16:41:00 to 19-APR-11 16:46:00 (CST-6)
Location: DARDENNE
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous reports of large hail ranging from ping pong ball size to baseball size.

Hail in LINCOLN, MISSOURI
From 19-APR-11 16:43:00 to 19-APR-11 16:43:00 (CST-6)
Location: WINFIELD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. CHARLES, MISSOURI
From 19-APR-11 16:50:00 to 19-APR-11 16:55:00 (CST-6)
Location: O FALLON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GASCONADE, MISSOURI
From 19-APR-11 17:03:00 to 19-APR-11 17:03:00 (CST-6)
Location: REDBIRD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GASCONADE, MISSOURI
From 19-APR-11 17:10:00 to 19-APR-11 17:10:00 (CST-6)
Location: ROSEBUD
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in ST. CHARLES, MISSOURI
From 19-APR-11 17:00:00 to 19-APR-11 17:00:00 (CST-6)
Location: CAPPELN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WARREN, MISSOURI
From 19-APR-11 17:00:00 to 19-APR-11 17:00:00 (CST-6)
Location: DUTZOW
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. CHARLES, MISSOURI
From 19-APR-11 17:05:00 to 19-APR-11 17:05:00 (CST-6)
Location: NEW MELLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in FRANKLIN, MISSOURI
From 19-APR-11 17:18:00 to 19-APR-11 17:18:00 (CST-6)
Location: LESLIE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in ST. CHARLES, MISSOURI
From 19-APR-11 17:22:00 to 19-APR-11 17:22:00 (CST-6)
Location: WELDON SPG
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Thunderstorm Wind in ST. CHARLES, MISSOURI
From 19-APR-11 17:29:00 to 19-APR-11 17:29:00 (CST-6)
Location: ST CHARLES
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. CHARLES, MISSOURI
From 19-APR-11 17:29:00 to 19-APR-11 17:30:00 (CST-6)
Location: ST CHARLES
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. CHARLES, MISSOURI
From 19-APR-11 17:50:00 to 19-APR-11 17:50:00 (CST-6)
Location: ST CHARLES
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in ST. LOUIS, MISSOURI
From 19-APR-11 17:54:00 to 19-APR-11 18:05:00 (CST-6)
Location: HAZELWOOD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. LOUIS, MISSOURI
From 19-APR-11 17:53:00 to 19-APR-11 17:53:00 (CST-6)
Location: BRIDGETON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in ST. LOUIS, MISSOURI
From 19-APR-11 18:18:00 to 19-APR-11 18:18:00 (CST-6)
Location: POND
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. LOUIS, MISSOURI
From 19-APR-11 18:22:00 to 19-APR-11 18:27:00 (CST-6)
Location: BALLWIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A swath of one inch hail fell from Ballwin and points east through Manchester, Des Peres and Kirkwood.

Hail in ST. LOUIS, MISSOURI
From 19-APR-11 18:33:00 to 19-APR-11 18:36:00 (CST-6)
Location: WARSON WOODS
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A swath of large hail fell in an area from Warson Woods through Brentwood and into University City.  Two inch hail was reported in Warson Woods.

Hail in WASHINGTON, MISSOURI
From 19-APR-11 18:23:00 to 19-APR-11 18:23:00 (CST-6)
Location: ANTHONIES MILL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in FRANKLIN, MISSOURI
From 19-APR-11 18:23:00 to 19-APR-11 18:23:00 (CST-6)
Location: ROBERTSVILLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in ST. LOUIS, MISSOURI
From 19-APR-11 18:41:00 to 19-APR-11 18:42:00 (CST-6)
Location: FENTON
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in ST. LOUIS, MISSOURI
From 19-APR-11 18:42:00 to 19-APR-11 18:42:00 (CST-6)
Location: SAPPINGTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds tore some siding off of a mobile home.

Hail in ST. LOUIS, MISSOURI
From 19-APR-11 18:43:00 to 19-APR-11 18:43:00 (CST-6)
Location: SAPPINGTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. LOUIS, MISSOURI
From 19-APR-11 18:43:00 to 19-APR-11 18:43:00 (CST-6)
Location: LAKESHIRE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Thunderstorm Wind in JEFFERSON, MISSOURI
From 19-APR-11 18:51:00 to 19-APR-11 18:51:00 (CST-6)
Location: FESTUS
Magnitude: 65.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in ST. LOUIS (C), MISSOURI
From 19-APR-11 18:35:00 to 19-APR-11 18:35:00 (CST-6)
Location: ST LOUIS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MADISON, MISSOURI
From 19-APR-11 18:45:00 to 19-APR-11 18:45:00 (CST-6)
Location: FREDERICKTOWN
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in AUDRAIN, MISSOURI
From 19-APR-11 14:37:00 to 19-APR-11 14:37:00 (CST-6)
Location: VANDALIA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in PIKE, MISSOURI
From 19-APR-11 14:50:00 to 19-APR-11 14:57:00 (CST-6)
Location: CURRYVILLE
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MONTGOMERY, MISSOURI
From 19-APR-11 14:51:00 to 19-APR-11 14:51:00 (CST-6)
Location: WELLSVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. LOUIS, MISSOURI
From 19-APR-11 18:30:00 to 19-APR-11 18:30:00 (CST-6)
Location: LAKE JCT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in REYNOLDS, MISSOURI
From 19-APR-11 18:10:00 to 19-APR-11 18:10:00 (CST-6)
Location: ELLINGTON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down numerous trees in the Ellington area.  A number of them fell onto local roads.

Hail in COLE, MISSOURI
From 19-APR-11 15:00:00 to 19-APR-11 15:01:00 (CST-6)
Location: JEFFERSON CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CALLAWAY, MISSOURI
From 19-APR-11 15:06:00 to 19-APR-11 15:08:00 (CST-6)
Location: NEW BLOOMFIELD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CALLAWAY, MISSOURI
From 19-APR-11 15:12:00 to 19-APR-11 15:14:00 (CST-6)
Location: FULTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CALLAWAY, MISSOURI
From 19-APR-11 15:08:00 to 19-APR-11 15:08:00 (CST-6)
Location: MOKANE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in PIKE, MISSOURI
From 19-APR-11 15:15:00 to 19-APR-11 15:20:00 (CST-6)
Location: VERA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in PIKE, MISSOURI
From 19-APR-11 15:35:00 to 19-APR-11 15:35:00 (CST-6)
Location: CLARKSVILLE
Magnitude: 4.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in PIKE, MISSOURI
From 19-APR-11 15:40:00 to 19-APR-11 15:40:00 (CST-6)
Location: LOUISIANA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in ST. CHARLES, MISSOURI
From 19-APR-11 15:39:00 to 19-APR-11 15:49:00 (CST-6)
Location: DARDENNE
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Numerous reports of hail ranging in size from one and a half inches to two inches over portions of O'Fallon.

Hail in ST. CHARLES, MISSOURI
From 19-APR-11 15:49:00 to 19-APR-11 15:49:00 (CST-6)
Location: ST PETERS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. LOUIS, MISSOURI
From 19-APR-11 20:33:00 to 19-APR-11 20:36:00 (CST-6)
Location: HAZELWOOD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. LOUIS, MISSOURI
From 19-APR-11 20:33:00 to 19-APR-11 20:36:00 (CST-6)
Location: HAZELWOOD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in PIKE, MISSOURI
From 19-APR-11 15:36:00 to 19-APR-11 15:37:00 (CST-6)
Location: CLARKSVILLE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado touched down in the south side of Clarksville, damaging trees, removing shingles from several homes, and damaging fencing and several carports in the area.  Several windows on the east side of the Catholic Church were also broken.  Witnesses report that after the tornado exited Clarksville the funnel began to cross the Mississippi River, but dissipated before crossing into Calhoun County, Illinois.  Total length of this tornado was 0.4 miles, with a maximum width of about 50 yards.  The damage in this area was rated EF0, with winds of 70 to 75 mph.

Hail in FRANKLIN, MISSOURI
From 19-APR-11 16:38:00 to 19-APR-11 16:38:00 (CST-6)
Location: ETLAH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in ST. CHARLES, MISSOURI
From 19-APR-11 16:40:00 to 19-APR-11 16:40:00 (CST-6)
Location: NEW MELLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in PIKE, MISSOURI
From 19-APR-11 15:00:00 to 19-APR-11 15:08:00 (CST-6)
Location: FARMER
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down about 6 miles southwest of Bowling Green, near the intersection of County Roads 147 and 148, producing minor tree damage.  The tornado then moved northeast, damaging a barn south of County Road 482 and then producing extensive tree damage just north of the intersection of County Roads 482 and 481.  The tornado continued northeast, striking a farm on Highway Y.  A barn was destroyed at this location, and produced extensive damage to the roof and the second story of a home.  The tornado then veered a bit to the east and produced its greatest damage to a farmstead about 2.4 miles southwest of Bowling Green and 1.5 miles west of Highway 161.  The home at this location suffered extensive damage, while several outbuildings and implements were totally destroyed.  Although the tornado lifted shortly after striking the farm, debris was strewn over one-half mile to the east of the farm, with insulation from the farmstead blown across Highway 161.  The total length of the tornado was about 4.1 miles, with a maximum damage width of 100 to 150 yards. Maximum damage rated at the second farmstead was high end EF1, with winds of 100 to 110 mph.

Thunderstorm Wind in ST. FRANCOIS, MISSOURI
From 19-APR-11 18:40:00 to 19-APR-11 18:40:00 (CST-6)
Location: FARMINGTON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees were blown over onto U.S. Highway 67.

Hail in FRANKLIN, MISSOURI
From 19-APR-11 17:20:00 to 19-APR-11 17:21:00 (CST-6)
Location: NEW HAVEN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in FRANKLIN, MISSOURI
From 19-APR-11 17:22:00 to 19-APR-11 17:28:00 (CST-6)
Location: WASHINGTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in STE. GENEVIEVE, MISSOURI
From 19-APR-11 18:50:00 to 19-APR-11 18:50:00 (CST-6)
Location: STE GENEVIEVE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down several trees and power lines around town. Also, the roof of a hardware store sustained minor damage due to the thunderstorm winds.

Hail in ST. CHARLES, MISSOURI
From 19-APR-11 17:30:00 to 19-APR-11 17:30:00 (CST-6)
Location: COTTLEVILLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in CALLAWAY, MISSOURI
From 19-APR-11 14:57:00 to 19-APR-11 14:57:00 (CST-6)
Location: (JEF)JFFRSN CITY MEM
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in OSAGE, MISSOURI
From 19-APR-11 15:43:00 to 19-APR-11 15:47:00 (CST-6)
Location: LINN
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous reports of hail ranging from one inch to two and a half inches.