A large complex of thunderstorms developed along a frontal boundary as it moved south across the region.  Numerous reports of large hail, damaging winds and flash flooding were received.  Also, two brief tornadoes were reported.

Hail in LEWIS, MISSOURI
From 15-MAY-09 10:55:00 to 15-MAY-09 10:55:00 (CST-6)
Location: LA BELLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in LEWIS, MISSOURI
From 15-MAY-09 12:45:00 to 15-MAY-09 21:30:00 (CST-6)
Location: DEER RIDGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Up to four inches of rain fell in Lewis county with an isolated 6.78 inch amount at Ewing in a short amount of time, causing flash flooding.  Numerous roads were flooded including Highway 16 between Monticello and Canton, Route A just north of Monticello, and Route D just south of La Belle.

Flash Flood in KNOX, MISSOURI
From 15-MAY-09 13:00:00 to 15-MAY-09 21:30:00 (CST-6)
Location: GREENSBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Up to four inches of rain fell in a short amount of time, causing flash flooding.  Numerous roads were flooded including Route V a mile north of Route AA and Highway 151 near the bridge that goes over the North River was impassable.

Hail in SHELBY, MISSOURI
From 15-MAY-09 13:18:00 to 15-MAY-09 13:18:00 (CST-6)
Location: EMDEN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in MONROE, MISSOURI
From 15-MAY-09 15:47:00 to 15-MAY-09 15:48:00 (CST-6)
Location: HOLLIDAY
Tornado F-scale: EF0
Reported by: Public

A tornado briefly touched down in an open field.  No damage was reported.

Tornado in MONROE, MISSOURI
From 15-MAY-09 16:00:00 to 15-MAY-09 16:01:00 (CST-6)
Location: SANTA FE
Tornado F-scale: EF0
Reported by: Public

A tornado briefly touched down in an open field and traveled to the east.  It bent one power pole, blew down several large tree limbs and a couple of trees before lifting and dissipating.

Hail in BOONE, MISSOURI
From 15-MAY-09 16:37:00 to 15-MAY-09 16:37:00 (CST-6)
Location: MIDWAY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in BOONE, MISSOURI
From 15-MAY-09 16:40:00 to 15-MAY-09 16:40:00 (CST-6)
Location: COLUMBIA
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in PIKE, MISSOURI
From 15-MAY-09 16:45:00 to 15-MAY-09 16:45:00 (CST-6)
Location: CURRYVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down several large tree limbs.

Hail in PIKE, MISSOURI
From 15-MAY-09 16:45:00 to 15-MAY-09 16:45:00 (CST-6)
Location: CURRYVILLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BOONE, MISSOURI
From 15-MAY-09 16:50:00 to 15-MAY-09 16:50:00 (CST-6)
Location: COLUMBIA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Flash Flood in BOONE, MISSOURI
From 15-MAY-09 17:00:00 to 15-MAY-09 22:00:00 (CST-6)
Location: RUCKER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Up to four inches of rain fell in a short amount of time causing flash flooding.  Numerous roads were flooded including Paris Road a little south of U.S. Highway 63, Vandiver Road east of the intersection with Paris Road, Highway 124 between U.S. Highway 63 and Hallsville, and the intersection of Thomas Hill Road and Highway V south of Sturgeon.

Hail in MONROE, MISSOURI
From 15-MAY-09 13:37:00 to 15-MAY-09 13:40:00 (CST-6)
Location: MONROE CITY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LEWIS, MISSOURI
From 15-MAY-09 14:39:00 to 15-MAY-09 14:39:00 (CST-6)
Location: EWING
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MONROE, MISSOURI
From 15-MAY-09 15:35:00 to 15-MAY-09 15:35:00 (CST-6)
Location: MADISON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Thunderstorm winds blew down several power lines, large tree limbs and a few trees.

Hail in MONROE, MISSOURI
From 15-MAY-09 15:35:00 to 15-MAY-09 15:50:00 (CST-6)
Location: MADISON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in MARION, MISSOURI
From 15-MAY-09 16:10:00 to 15-MAY-09 16:11:00 (CST-6)
Location: HANNIBAL
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in ST. CHARLES, MISSOURI
From 15-MAY-09 17:55:00 to 15-MAY-09 17:55:00 (CST-6)
Location: ST CHARLES ARPT
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Several power lines and a tree were blown down at the intersection of Portage Road and Grafton Ferry Road.

Thunderstorm Wind in AUDRAIN, MISSOURI
From 15-MAY-09 16:15:00 to 15-MAY-09 16:15:00 (CST-6)
Location: MEXICO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down numerous large tree limbs east of town.