A strong shortwave moved through the region, triggering showers and thunderstorms.  There were numerous reports of large hail and one report of flash flooding with these storms.

Hail in WARREN, MISSOURI
From 15-MAR-12 20:50:00 to 15-MAR-12 20:50:00 (CST-6)
Location: TRUESDALE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BOONE, MISSOURI
From 15-MAR-12 23:41:00 to 15-MAR-12 23:46:00 (CST-6)
Location: COLUMBIA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

There were several reports of one inch hail on the north side of Columbia.

Flash Flood in CRAWFORD, MISSOURI
From 15-MAR-12 20:45:00 to 16-MAR-12 03:00:00 (CST-6)
Location: BOURBON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Up to two inches of rain fell in a short amount of time causing flash flooding. Several roads were flooded including Highway N between Bourbon and Anthonies Mill.

Flash Flood in OSAGE, MISSOURI
From 15-MAR-12 21:15:00 to 16-MAR-12 03:00:00 (CST-6)
Location: SHUBERT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Up to two inches of rain fell in a short amount of time causing flash flooding.  Several roads were flooded including U.S. Highway 50 just east of Linn and Highways Y and NN in far southeastern Osage County.

Flash Flood in GASCONADE, MISSOURI
From 15-MAR-12 23:00:00 to 16-MAR-12 03:30:00 (CST-6)
Location: ELAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Up to two inches of rain fell in a short amount of time causing flash flooding. Several roads were flooded including Highway A just north of Bland.

Hail in ST. CHARLES, MISSOURI
From 15-MAR-12 20:35:00 to 15-MAR-12 20:35:00 (CST-6)
Location: WENTZVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GASCONADE, MISSOURI
From 15-MAR-12 21:15:00 to 15-MAR-12 21:15:00 (CST-6)
Location: OWENSVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. LOUIS, MISSOURI
From 15-MAR-12 15:10:00 to 15-MAR-12 15:20:00 (CST-6)
Location: NATURAL BRIDGE JCT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous reports of one inch hail fell in a large swath from just west of Lambert-St. Louis International Airport, across the airport grounds and continued to the northeast of the airport.

Hail in CRAWFORD, MISSOURI
From 15-MAR-12 13:23:00 to 15-MAR-12 13:23:00 (CST-6)
Location: CUBA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WARREN, MISSOURI
From 15-MAR-12 14:45:00 to 15-MAR-12 14:49:00 (CST-6)
Location: MARTHASVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. CHARLES, MISSOURI
From 15-MAR-12 15:01:00 to 15-MAR-12 15:05:00 (CST-6)
Location: NEW MELLE
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous reports of large hail in the New Melle area...with the largest being tennis ball size. Also, there were several reports of siding damage, tree limbs knocked down and a couple of cars sustained windshield damage.

Hail in ST. CHARLES, MISSOURI
From 15-MAR-12 15:11:00 to 15-MAR-12 15:30:00 (CST-6)
Location: DARDENNE
Magnitude: 2.75 
Crop damage: 0.00K
Reported by: Trained Spotter

A wide swath of large hail fell from areas along and west of I-64 near Highways N and DD to the east northeast through the cities of Lake St. Louis, Dardenne Prairie, and O'Fallon.  The largest hail stones, baseball size, were reported near the intersection of Winghaven Boulevard and I-64. There were numerous reports of one to two inch diameter hail.

Hail in OSAGE, MISSOURI
From 15-MAR-12 15:40:00 to 15-MAR-12 15:40:00 (CST-6)
Location: JUDGE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LINCOLN, MISSOURI
From 15-MAR-12 15:44:00 to 15-MAR-12 15:44:00 (CST-6)
Location: HAWK PT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ST. CHARLES, MISSOURI
From 15-MAR-12 15:45:00 to 15-MAR-12 15:49:00 (CST-6)
Location: ST PETERS
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous reports of large hail fell over portions of St. Peters and St. Charles.  The largest hail stones, one and a half inches in diameter, were reported in northeastern St. Peters.

Hail in GASCONADE, MISSOURI
From 15-MAR-12 16:23:00 to 15-MAR-12 16:23:00 (CST-6)
Location: DRAKE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MONTGOMERY, MISSOURI
From 15-MAR-12 16:20:00 to 15-MAR-12 16:25:00 (CST-6)
Location: NEW FLORENCE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in FRANKLIN, MISSOURI
From 15-MAR-12 19:00:00 to 15-MAR-12 19:00:00 (CST-6)
Location: NEW HAVEN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in OSAGE, MISSOURI
From 15-MAR-12 19:13:00 to 15-MAR-12 19:13:00 (CST-6)
Location: SHUBERT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in COLE, MISSOURI
From 15-MAR-12 19:19:00 to 15-MAR-12 19:19:00 (CST-6)
Location: JEFFERSON CITY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MADISON, MISSOURI
From 15-MAR-12 19:53:00 to 15-MAR-12 19:53:00 (CST-6)
Location: ALLBRIGHT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in OSAGE, MISSOURI
From 15-MAR-12 19:55:00 to 15-MAR-12 19:55:00 (CST-6)
Location: SHUBERT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in COLE, MISSOURI
From 15-MAR-12 20:15:00 to 15-MAR-12 20:15:00 (CST-6)
Location: JEFFERSON CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CRAWFORD, MISSOURI
From 15-MAR-12 20:15:00 to 15-MAR-12 20:15:00 (CST-6)
Location: HINCH
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CRAWFORD, MISSOURI
From 15-MAR-12 20:25:00 to 15-MAR-12 20:25:00 (CST-6)
Location: HINCH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CRAWFORD, MISSOURI
From 15-MAR-12 20:35:00 to 15-MAR-12 20:35:00 (CST-6)
Location: INDIAN HILLS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in COLE, MISSOURI
From 15-MAR-12 20:45:00 to 15-MAR-12 20:55:00 (CST-6)
Location: JEFFERSON CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous reports of one inch hail on the south side of Jefferson City.

Hail in OSAGE, MISSOURI
From 15-MAR-12 20:25:00 to 15-MAR-12 20:25:00 (CST-6)
Location: SHUBERT
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GASCONADE, MISSOURI
From 15-MAR-12 15:58:00 to 15-MAR-12 16:02:00 (CST-6)
Location: MORRISON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in COLE, MISSOURI
From 15-MAR-12 20:35:00 to 15-MAR-12 20:35:00 (CST-6)
Location: JEFFERSON CITY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter