A stalled frontal boundary over the region helped to trigger showers and thunderstorms.  Some of the storms produced severe weather and flash flooding.

Thunderstorm Wind in REYNOLDS, MISSOURI
From 12-JUL-11 19:15:00 to 12-JUL-11 19:15:00 (CST-6)
Location: LESTERVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds snapped off a large tree and blew down numerous tree limbs.  Some siding was blown off of a house.

Flash Flood in KNOX, MISSOURI
From 12-JUL-11 13:00:00 to 12-JUL-11 15:30:00 (CST-6)
Location: NEWARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Up to three inches of rain fell in a short amount of time causing flash flooding.  Several roads were flooded including Highway 15 about three to four miles north of Ednina.

Lightning in COLE, MISSOURI
From 12-JUL-11 21:00:00 to 12-JUL-11 21:00:00 (CST-6)
Location: BRAZITO
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Newspaper

Lightning struck a building that housed the sales/gift shop of a nursery.  Fire spread rapidly through the building and it is considered a total loss.  No injuries were reported and the other buildings nearby were unharmed.

Hail in CALLAWAY, MISSOURI
From 12-JUL-11 15:30:00 to 12-JUL-11 15:30:00 (CST-6)
Location: MOKANE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in WASHINGTON, MISSOURI
From 13-JUL-11 00:30:00 to 13-JUL-11 08:00:00 (CST-6)
Location: APTUS
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 F north northwest of Potosi.

Hail in KNOX, MISSOURI
From 12-JUL-11 13:14:00 to 12-JUL-11 13:14:00 (CST-6)
Location: COLONY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in KNOX, MISSOURI
From 12-JUL-11 13:25:00 to 12-JUL-11 13:25:00 (CST-6)
Location: NOVELTY
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in KNOX, MISSOURI
From 12-JUL-11 13:30:00 to 12-JUL-11 13:30:00 (CST-6)
Location: NOVELTY
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in PIKE, MISSOURI
From 12-JUL-11 15:20:00 to 12-JUL-11 15:20:00 (CST-6)
Location: BOWLING GREEN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew a large tree over as well as numerous tree limbs.

Thunderstorm Wind in MARION, MISSOURI
From 12-JUL-11 14:44:00 to 12-JUL-11 14:46:00 (CST-6)
Location: HANNIBAL MUNI ARPT
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm winds blew down numerous trees, tree limbs, power poles and power lines.  Also, a billboard was blown down onto Highway 79.  A few of the fallen trees and tree limbs landed on vehicles, garages and homes in town.  At least one garage was destroyed by a fallen tree.  A hangar at Hannibal Regional Airport was damaged by the winds.  The doors on the western side of the building were blown open and could not be closed.  No airplanes in the hangar were damaged by the storm.

Thunderstorm Wind in MARION, MISSOURI
From 12-JUL-11 14:40:00 to 12-JUL-11 14:40:00 (CST-6)
Location: PALMYRA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down several trees and numerous tree limbs around town.

Thunderstorm Wind in PIKE, MISSOURI
From 12-JUL-11 15:35:00 to 12-JUL-11 15:35:00 (CST-6)
Location: LOUISIANA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down several power lines around town.