During the overnight hours on August 18, a line of strong thunderstorms moved out of southeast Nebraska into northeast Kansas. These storms brought periods of strong winds of 70 to 80 mph, with some locations reporting damage to trees and structures.

Thunderstorm Wind in POTTAWATOMIE, KANSAS
From 18-AUG-11 22:39:00 to 18-AUG-11 22:40:00 (CST-6)
Location: WAMEGO
Magnitude: 56.00 EG
Reported by: Emergency Manager

Trees blown down.

Thunderstorm Wind in SHAWNEE, KANSAS
From 18-AUG-11 22:25:00 to 18-AUG-11 22:26:00 (CST-6)
Location: LAKE SHAWNEE
Magnitude: 61.00 EG
Reported by: Emergency Manager

Two large semi-trailers blown over.

Thunderstorm Wind in SHAWNEE, KANSAS
From 18-AUG-11 22:02:00 to 18-AUG-11 22:03:00 (CST-6)
Location: (TOP)BILLARD ARPT TO
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

ASOS wind gust measurement.

Thunderstorm Wind in WABAUNSEE, KANSAS
From 18-AUG-11 22:15:00 to 18-AUG-11 22:16:00 (CST-6)
Location: MAPLE HILL
Magnitude: 61.00 EG
Reported by: Law Enforcement

Semi-trailer truck blown over on I-70.

Thunderstorm Wind in SHAWNEE, KANSAS
From 18-AUG-11 22:18:00 to 18-AUG-11 22:19:00 (CST-6)
Location: WILLARD
Magnitude: 61.00 EG
Reported by: Trained Spotter

Seven inch diameter tree limbs broken.

Thunderstorm Wind in BROWN, KANSAS
From 18-AUG-11 21:03:00 to 18-AUG-11 21:04:00 (CST-6)
Location: ROBINSON
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

APRS mesonet site measured 66 mph wind gust.

Thunderstorm Wind in JACKSON, KANSAS
From 18-AUG-11 21:55:00 to 18-AUG-11 21:56:00 (CST-6)
Location: HOYT
Magnitude: 52.00 EG
Reported by: Trained Spotter

Trees blown across the road with several three inch diameter tree limbs down.

Thunderstorm Wind in SHAWNEE, KANSAS
From 18-AUG-11 22:06:00 to 18-AUG-11 22:07:00 (CST-6)
Location: (TOP)BILLARD ARPT TO
Magnitude: 61.00 EG
Reported by: NWS Employee

Widespread tree damage in the Oakland area in northeast Topeka. Numerous branches greater than eight inches in diameter broken off with some uprooted trees. One tree landed on the roof of a home. Roof damage was also observed. Wind gusts of 70 mph were measured at Billard Airport.

Thunderstorm Wind in SHAWNEE, KANSAS
From 18-AUG-11 22:06:00 to 18-AUG-11 22:07:00 (CST-6)
Location: SILVER LAKE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Broadcast media reports estimated wind speeds of 60 mph in Silver Lake.

Thunderstorm Wind in SHAWNEE, KANSAS
From 18-AUG-11 22:05:00 to 18-AUG-11 22:06:00 (CST-6)
Location: (TOP)BILLARD ARPT TO
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Topeka ASOS measured wind gusts of 70 mph.

Thunderstorm Wind in SHAWNEE, KANSAS
From 18-AUG-11 22:10:00 to 18-AUG-11 22:11:00 (CST-6)
Location: (FOE)FORBES FLD TOPE
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Measured wind gusts of 61 mph at Topeka Forbes Field.

Thunderstorm Wind in DOUGLAS, KANSAS
From 18-AUG-11 22:14:00 to 18-AUG-11 22:15:00 (CST-6)
Location: LAWRENCE
Magnitude: 52.00 EG
Reported by: NWS Employee

Estimated 60 mph winds with blown transformers around Lawrence.

Thunderstorm Wind in SHAWNEE, KANSAS
From 18-AUG-11 22:25:00 to 18-AUG-11 22:26:00 (CST-6)
Location: (FOE)FORBES FLD TOPE
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

ASOS measured wind gust of 63 mph at Topeka Forbes Field.

Thunderstorm Wind in SHAWNEE, KANSAS
From 18-AUG-11 22:13:00 to 18-AUG-11 22:14:00 (CST-6)
Location: TOPEKA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager estimated winds of 60 mph near Washburn University in Topeka.

Thunderstorm Wind in SHAWNEE, KANSAS
From 18-AUG-11 22:40:00 to 18-AUG-11 22:41:00 (CST-6)
Location: MENOKEN
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager estimates wind speed of 75 mph at menninger hill in Topeka with pea sized hail.

Thunderstorm Wind in SHAWNEE, KANSAS
From 18-AUG-11 22:38:00 to 18-AUG-11 22:39:00 (CST-6)
Location: MENOKEN
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Winds gust of 75 mph estimated near WIBW studios in Topeka.

Thunderstorm Wind in ANDERSON, KANSAS
From 18-AUG-11 23:38:00 to 18-AUG-11 23:39:00 (CST-6)
Location: GARNETT
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Garnett AWOS measured wind gust of 61 mph.

Thunderstorm Wind in COFFEY, KANSAS
From 18-AUG-11 23:45:00 to 18-AUG-11 23:46:00 (CST-6)
Location: BURLINGTON
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Measured wind gust of 66 mph at wolf creek power plant.

Thunderstorm Wind in JEFFERSON, KANSAS
From 18-AUG-11 22:02:00 to 18-AUG-11 22:03:00 (CST-6)
Location: OZAWKIE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter estimated winds of 60 mph.

Thunderstorm Wind in JACKSON, KANSAS
From 18-AUG-11 22:15:00 to 18-AUG-11 22:16:00 (CST-6)
Location: MAYETTA
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured wind gust at RAWS mesonet site.

Hail in DOUGLAS, KANSAS
From 18-AUG-11 22:41:00 to 18-AUG-11 22:42:00 (CST-6)
Location: LAWRENCE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in BROWN, KANSAS
From 18-AUG-11 20:49:00 to 18-AUG-11 20:50:00 (CST-6)
Location: PADONIA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter estimated winds of 55-65 mph winds.

Thunderstorm Wind in BROWN, KANSAS
From 18-AUG-11 21:15:00 to 18-AUG-11 21:16:00 (CST-6)
Location: ROBINSON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement estimates winds of 60 mph.

Thunderstorm Wind in JACKSON, KANSAS
From 18-AUG-11 21:45:00 to 18-AUG-11 21:46:00 (CST-6)
Location: HOLTON
Magnitude: 56.00 EG
Reported by: Law Enforcement

Tree blown down on car in Holton on highway 16.

Thunderstorm Wind in JEFFERSON, KANSAS
From 18-AUG-11 21:55:00 to 18-AUG-11 21:56:00 (CST-6)
Location: VALLEY FALLS
Magnitude: 61.00 EG
Reported by: Law Enforcement

Small buildings destroyed and power lines blown down in Valley Falls.

Thunderstorm Wind in DOUGLAS, KANSAS
From 18-AUG-11 22:13:00 to 18-AUG-11 22:14:00 (CST-6)
Location: LAWRENCE
Magnitude: 56.00 EG
Reported by: Broadcast Media

Power lines blown down at 7th and Iowa St. in Lawrence.

Thunderstorm Wind in SHAWNEE, KANSAS
From 18-AUG-11 22:08:00 to 18-AUG-11 22:09:00 (CST-6)
Location: TECUMSEH
Magnitude: 61.00 EG
Reported by: Emergency Manager

Reports of roof damage to homes. Also widespread reports of trees and power lines down across the county from the emergency manager.

Thunderstorm Wind in SHAWNEE, KANSAS
From 18-AUG-11 22:15:00 to 18-AUG-11 22:16:00 (CST-6)
Location: TOPEKA
Magnitude: 56.00 EG
Reported by: Public

Public report of shed blown over.

Thunderstorm Wind in SHAWNEE, KANSAS
From 18-AUG-11 22:15:00 to 18-AUG-11 22:16:00 (CST-6)
Location: TECUMSEH
Magnitude: 61.00 EG
Reported by: Emergency Manager

Half of roof blown off house with many trees blown down.

Thunderstorm Wind in DOUGLAS, KANSAS
From 18-AUG-11 22:33:00 to 18-AUG-11 22:34:00 (CST-6)
Location: BALDWIN
Magnitude: 61.00 EG
Reported by: Trained Spotter

Five inch diameter trees limbs down with estimated gusts of 60-70 mph.

Thunderstorm Wind in OSAGE, KANSAS
From 18-AUG-11 22:45:00 to 18-AUG-11 22:46:00 (CST-6)
Location: CARBONDALE
Magnitude: 56.00 EG
Reported by: NWS Employee

Damage to roof with winds of 60-65 mph estimated.

Thunderstorm Wind in SHAWNEE, KANSAS
From 18-AUG-11 22:15:00 to 18-AUG-11 22:16:00 (CST-6)
Location: TECUMSEH
Magnitude: 61.00 EG
Reported by: Emergency Manager

Many trees down along second street from Croco Rd to Tecumseh.

Thunderstorm Wind in POTTAWATOMIE, KANSAS
From 18-AUG-11 22:08:00 to 18-AUG-11 22:09:00 (CST-6)
Location: ST MARYS
Magnitude: 65.00 EG
Reported by: Law Enforcement

Trees down and most of St. Marys without power.

Thunderstorm Wind in SHAWNEE, KANSAS
From 18-AUG-11 22:50:00 to 18-AUG-11 22:51:00 (CST-6)
Location: PAULINE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Reports of 4 inch diameter tree limbs down with half inch sized hail.

Thunderstorm Wind in SHAWNEE, KANSAS
From 18-AUG-11 22:49:00 to 18-AUG-11 22:50:00 (CST-6)
Location: TOPEKA
Magnitude: 56.00 EG
Reported by: Trained Spotter

Three inch diameter tree limbs and street sign blown over at 10th and I-70 in Topeka.

Thunderstorm Wind in OSAGE, KANSAS
From 18-AUG-11 22:57:00 to 18-AUG-11 22:58:00 (CST-6)
Location: BURLINGAME
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Three to four inch diameter tree limbs blown down.

Thunderstorm Wind in FRANKLIN, KANSAS
From 18-AUG-11 23:02:00 to 18-AUG-11 23:03:00 (CST-6)
Location: OTTAWA
Magnitude: 56.00 EG
Reported by: Law Enforcement

Trees and power lines reported down across the city of Ottawa.

Thunderstorm Wind in POTTAWATOMIE, KANSAS
From 18-AUG-11 22:39:00 to 18-AUG-11 22:40:00 (CST-6)
Location: EMMETT
Magnitude: 56.00 EG
Reported by: Emergency Manager

Part of roof of house blown off.

Thunderstorm Wind in POTTAWATOMIE, KANSAS
From 18-AUG-11 22:08:00 to 18-AUG-11 22:09:00 (CST-6)
Location: EMMETT
Magnitude: 56.00 EG
Reported by: Law Enforcement

Mobile homes lost 3/4's of its rood on Holly Cross Rd.