Showers and thunderstorms developed over Missouri ahead of a strong cold front.  Some of the storms became severe with large hail and isolated reports of damaging winds.

Hail in BOONE, MISSOURI
From 04-MAR-11 15:16:00 to 04-MAR-11 15:16:00 (CST-6)
Location: HALLSVILLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BOONE, MISSOURI
From 04-MAR-11 15:20:00 to 04-MAR-11 15:20:00 (CST-6)
Location: CENTRALIA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Thunderstorm Wind in BOONE, MISSOURI
From 04-MAR-11 15:20:00 to 04-MAR-11 15:20:00 (CST-6)
Location: HALLSVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Several power poles were blown down on Highway 124 between Hallsville and Centralia.

Hail in COLE, MISSOURI
From 04-MAR-11 15:30:00 to 04-MAR-11 15:30:00 (CST-6)
Location: RUSSELLVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in BOONE, MISSOURI
From 04-MAR-11 15:30:00 to 04-MAR-11 15:33:00 (CST-6)
Location: ASHLAND
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm winds caused minor damage to a few roofs in Ashland and blew down several trees. The ASOS at Columbia Regional Airport reported a 64 mph wind gusts when the storms moved through there.

Hail in COLE, MISSOURI
From 04-MAR-11 15:40:00 to 04-MAR-11 15:43:00 (CST-6)
Location: HONEY CREEK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous reports of three quarter inch to one inch hail were received in north central Cole county.

Thunderstorm Wind in MONTGOMERY, MISSOURI
From 04-MAR-11 16:03:00 to 04-MAR-11 16:03:00 (CST-6)
Location: BLUFFTON
Magnitude: 68.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GASCONADE, MISSOURI
From 04-MAR-11 16:25:00 to 04-MAR-11 16:28:00 (CST-6)
Location: HERMANN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Up to three inches of hail covered the ground in Hermann with the largest stones up to nickel size.

Thunderstorm Wind in AUDRAIN, MISSOURI
From 04-MAR-11 16:00:00 to 04-MAR-11 16:00:00 (CST-6)
Location: RUSH HILL
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds blew down several trees in town.

Hail in WARREN, MISSOURI
From 04-MAR-11 17:05:00 to 04-MAR-11 17:05:00 (CST-6)
Location: MARTHASVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. CHARLES, MISSOURI
From 04-MAR-11 17:11:00 to 04-MAR-11 17:11:00 (CST-6)
Location: NEW MELLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in ST. CHARLES, MISSOURI
From 04-MAR-11 18:55:00 to 04-MAR-11 23:15:00 (CST-6)
Location: ST CHARLES
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Between one and two inches of rain fell in a short amount of time on already saturated soils causing flash flooding.  Several streets were flooded including the south service road of eastbound Highway 364 at Woodstone Drive.  Dardenne Creek at St. Peters went a foot above flood stage during this time causing flash flooding in the area.

Hail in ST. CHARLES, MISSOURI
From 04-MAR-11 17:10:00 to 04-MAR-11 17:10:00 (CST-6)
Location: WENTZVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter