Thunderstorms once again developed on Friday, August 19th, 2011. The storms formed along a boundary of very warm temperatures in the Southern Plains, and cooler temperatures in the Mid-Missouri River valley. A developing cluster of storms over east central Kansas rapidly transitioned into a wind producing MCS, as it approached and crossed the Kansas City metro.  However, ahead of this complex, a very strong storm dropped south out of Nebraska, and produced extreme hail up to the size of 4.5 inches in the cities of Easton and Leavenworth. This storm however decreased in intensity as it entered Kansas City, setting the stage for the strong wind producing MCS in east central Kansas to become the main threat.  Measured wind speeds between 60 and 80 mph, raced through extreme eastern Kansas, causing additional tree and power line damage leading to power outages.

Thunderstorm Wind in ATCHISON, KANSAS
From 19-AUG-11 22:30:00 to 19-AUG-11 22:30:00 (CST-6)
Location: EFFINGHAM
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

A roof of a barn was blown off. Six inch diameter tree limbs were snapped off. Thunderstorm wind gusts were estimated up to 70 mph.

Hail in ATCHISON, KANSAS
From 19-AUG-11 22:34:00 to 19-AUG-11 22:34:00 (CST-6)
Location: EFFINGHAM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LEAVENWORTH, KANSAS
From 19-AUG-11 23:34:00 to 19-AUG-11 23:34:00 (CST-6)
Location: LEAVENWORTH
Magnitude: 4.50 
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail up to softball in size, was reported in Fort leavenworth. Car windows were broken out.

Hail in LEAVENWORTH, KANSAS
From 19-AUG-11 23:15:00 to 19-AUG-11 23:25:00 (CST-6)
Location: EASTON
Magnitude: 4.25 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Hail up to the size of softballs were reported around Easton. Windows were broken out of homes, along with roof damage.

Hail in ATCHISON, KANSAS
From 19-AUG-11 22:13:00 to 19-AUG-11 22:13:00 (CST-6)
Location: MUSCOTAH
Magnitude: 1.50 
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several homes reported broken windows due to wind driven hail.

Hail in ATCHISON, KANSAS
From 19-AUG-11 22:30:00 to 19-AUG-11 22:30:00 (CST-6)
Location: EFFINGHAM
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in LEAVENWORTH, KANSAS
From 19-AUG-11 23:50:00 to 19-AUG-11 23:50:00 (CST-6)
Location: LEAVENWORTH
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several powerlines were reported down. Thunderstorm wind gusts were estimated up to 60 mph.

Thunderstorm Wind in ATCHISON, KANSAS
From 19-AUG-11 22:15:00 to 19-AUG-11 22:15:00 (CST-6)
Location: MUSCOTAH
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous large trees and powerlines were reported down. Thunderstorm wind gusts were estimated up to 60 mph.

Thunderstorm Wind in LEAVENWORTH, KANSAS
From 19-AUG-11 23:40:00 to 19-AUG-11 23:40:00 (CST-6)
Location: LEAVENWORTH
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Power out in much of Leavenworth, due to downed power lines. A roof was blown onto Highway 73. Trees also reported blocking Highways 73 and 92. Thunderstorm wind gusts were estimated up to 60 mph.

Thunderstorm Wind in JOHNSON, KANSAS
From 20-AUG-11 01:17:00 to 20-AUG-11 01:17:00 (CST-6)
Location: OLATHE
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm wind gust was measured at 60 mph, at the Gardner ASOS.

Thunderstorm Wind in ATCHISON, KANSAS
From 19-AUG-11 22:20:00 to 19-AUG-11 22:20:00 (CST-6)
Location: MUSCOTAH
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

Several outbuildings were reported destroyed. Thunderstorm wind gusts were estimated up to 60 mph.

Thunderstorm Wind in ATCHISON, KANSAS
From 19-AUG-11 22:30:00 to 19-AUG-11 22:30:00 (CST-6)
Location: EFFINGHAM
Magnitude: 61.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm wind gusts were estimated up to 70 mph. Windows on the north side of a home, were blown out.

Thunderstorm Wind in LEAVENWORTH, KANSAS
From 19-AUG-11 23:50:00 to 19-AUG-11 23:50:00 (CST-6)
Location: LEAVENWORTH
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A large tree was reported down on the 900 block of 12th Street. Thunderstorm wind gusts were estimated up to 60 mph.