A slow moving cold front moved into an extremely hot and unstable airmass across central and eastern Kansas on Friday, August 13th, and sparked thunderstorms along a line from Salina to Seneca.  The airmass feeding into these storms was extremely unstable, with temperatures in the 100 to 106 degree range and dewpoint temperatures in the 60s and 70s.  This led to rapid storm intensification, with the first severe thunderstorm warning being issued less than 30 minutes after the storms formed.
The Manhattan airport tower measured a wind gust of 93 mph at the peak of the storm, with similar wind speeds in the 70 to 95 mph range from southern Manhattan through Ogden and other parts of southern Riley county.  The storm complex tracked eastward across southern Pottawatomie, northern Wabaunsee, southern Jackson, northern Shawnee and Jefferson counties.  While it weakened a bit as it pushed east, the storms left a swath of wind damage.
Additional severe thunderstorms developed along the front to the northeast and southwest of the initial complex, bringing repeated rounds of damaging winds of 50 to 70 mph, a few reports of hail larger than quarters, and intense cloud to ground lightning.  As the event wore on into the evening hours, thunderstorms continued to produce wind damage, with a truck being blown off the road and power lines down in Lyon county.

Thunderstorm Wind in GEARY, KANSAS
From 13-AUG-10 15:10:00 to 13-AUG-10 15:18:00 (CST-6)
Location: JUNCTION CITY
Magnitude: 65.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

At a residence 5 miles west of Junction City a metal outbuilding was destroyed, and debris was found nearly a quarter of a mile downwind.  Closer to Junction City, a gas station lost part of its awning.  Trees and power lines were reported down across Junction City resulting in many damaged roofs and cars and widespread power outages.

Thunderstorm Wind in POTTAWATOMIE, KANSAS
From 13-AUG-10 15:22:00 to 13-AUG-10 15:42:00 (CST-6)
Location: SWAMP ANGEL
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Law Enforcement

Power line and tree damage was reported in the eastern part of Manhattan. A street sign was also blown down in Wamego.

Thunderstorm Wind in RILEY, KANSAS
From 13-AUG-10 15:10:00 to 13-AUG-10 15:24:00 (CST-6)
Location: OGDEN
Magnitude: 81.00 MG
Property damage: 400.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A wind measuring instrument mounted to the roof of the Air Traffic Control tower at Manhattan Regional Airport measured a 93 mph wind gust.  The ASOS station at Manhattan Regional Airport also reported a strong wind gust of 68 mph.  In the town of Ogden the windows of a residence were cracked by the force of the wind.  No estimation of the wind speed was given by this resident.  Kansas State University also sustained some significant damage, as wind damage to Anderson Hall's roof resulted in over a quarter million dollars in repairs.  In and around Manhattan, numerous outbuildings were damaged and destroyed. Widespread power line and tree damage was also noted across the city, resulting in many damaged roofs and widespread power outages.

Thunderstorm Wind in DICKINSON, KANSAS
From 13-AUG-10 14:31:00 to 13-AUG-10 14:40:00 (CST-6)
Location: TALMAGE
Magnitude: 56.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters from across northern Dickinson county reported 60 to 70 mph wind gusts associated with a strong storm complex which moved over that area. near the town of Moonlight a 16 inch fig tree broke at the trunk about 2 feet from the ground. Tin from nearby outbuildings was also laying the front yard of the residence.

Thunderstorm Wind in POTTAWATOMIE, KANSAS
From 13-AUG-10 16:10:00 to 13-AUG-10 16:12:00 (CST-6)
Location: ST MARYS
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement officers reported power lines down, along with limb and tree damage, near St. Marys.

Thunderstorm Wind in GEARY, KANSAS
From 13-AUG-10 14:52:00 to 13-AUG-10 15:07:00 (CST-6)
Location: MILFORD
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Two campers and a pontoon boat were overturned by wind at Milford Lake.  Time was estimated by radar.

Thunderstorm Wind in MORRIS, KANSAS
From 13-AUG-10 18:00:00 to 13-AUG-10 18:10:00 (CST-6)
Location: COUNCIL GROVE RES
Magnitude: 70.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Near Council Grove numerous power lines were blown down. Two large trees, 15 and 18 inches respectively, were uprooted, and a grain bin was caved in.

Thunderstorm Wind in LYON, KANSAS
From 13-AUG-10 20:40:00 to 13-AUG-10 20:55:00 (CST-6)
Location: OLPE
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A law enforcement officer reported power poles down between Olpe and Madison. Also, near Hartford, a truck was blown off the road and into a ditch.

Thunderstorm Wind in SHAWNEE, KANSAS
From 13-AUG-10 16:23:00 to 13-AUG-10 16:50:00 (CST-6)
Location: ROSSVILLE
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency managers and trained spotters reported 70 mph winds across Shawnee county. Tree limbs were up to 3 inches were reported down across the county, and a large tree blew onto a residence, causing significant damage, near the town of Tecumseh.

Thunderstorm Wind in GEARY, KANSAS
From 13-AUG-10 16:27:00 to 13-AUG-10 16:32:00 (CST-6)
Location: BRANT
Magnitude: 61.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tree 24 inches in the diameter was reported uprooted on the west side of Highway 77 near Geary County Lake.  Time of the report was estimated by radar.

Thunderstorm Wind in MORRIS, KANSAS
From 13-AUG-10 16:56:00 to 13-AUG-10 17:01:00 (CST-6)
Location: FLINT
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were reported blown down near Parkerville.

Thunderstorm Wind in OSAGE, KANSAS
From 13-AUG-10 19:21:00 to 13-AUG-10 19:43:00 (CST-6)
Location: OSAGE CITY
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters across Osage County reported 65 mph wind gusts.

Thunderstorm Wind in COFFEY, KANSAS
From 13-AUG-10 21:05:00 to 13-AUG-10 21:10:00 (CST-6)
Location: SHARPE
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Law Enforcement

Tree damage, with power poles and power lines down were reported in the New Strawn area. Also a tree fell on top of two vehicles near Burlington.

Hail in DICKINSON, KANSAS
From 13-AUG-10 17:35:00 to 13-AUG-10 17:35:00 (CST-6)
Location: CHAPMAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in POTTAWATOMIE, KANSAS
From 13-AUG-10 09:35:00 to 13-AUG-10 09:39:00 (CST-6)
Location: ONAGA ARPT
Magnitude: 56.00 EG
Crop damage: 0.00K
Reported by: Public

A roof was blown off a barn near Onaga.  Time was estimated from radar.

Hail in DICKINSON, KANSAS
From 13-AUG-10 16:28:00 to 13-AUG-10 16:28:00 (CST-6)
Location: HOLLAND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DICKINSON, KANSAS
From 13-AUG-10 16:38:00 to 13-AUG-10 16:38:00 (CST-6)
Location: HOLLAND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DICKINSON, KANSAS
From 13-AUG-10 17:02:00 to 13-AUG-10 17:03:00 (CST-6)
Location: HOLLAND
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DICKINSON, KANSAS
From 13-AUG-10 17:29:00 to 13-AUG-10 17:29:00 (CST-6)
Location: ENTERPRISE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in JEFFERSON, KANSAS
From 13-AUG-10 16:52:00 to 13-AUG-10 17:15:00 (CST-6)
Location: GRANTVILLE
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency managers, law enforcement officers, and trained spotters reported 60 to 70 mph winds across Jefferson County. Large tree limbs were also reported down in Meriden, Grantville, Ozawkie, Alta Vista, Williamstown, and Winchester.

Thunderstorm Wind in MORRIS, KANSAS
From 13-AUG-10 17:38:00 to 13-AUG-10 17:43:00 (CST-6)
Location: BURDICK
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Law Enforcement

A lean to was blown off a barn in Burdick.

Thunderstorm Wind in BROWN, KANSAS
From 13-AUG-10 16:01:00 to 13-AUG-10 16:06:00 (CST-6)
Location: ROBINSON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter near Robinson reported a 60 mph wind gust.

Thunderstorm Wind in WABAUNSEE, KANSAS
From 13-AUG-10 16:20:00 to 13-AUG-10 16:25:00 (CST-6)
Location: MAPLE HILL
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter near Rossville reported an estimated 75 mph wind gust.

Thunderstorm Wind in DICKINSON, KANSAS
From 13-AUG-10 17:02:00 to 13-AUG-10 17:07:00 (CST-6)
Location: HOLLAND
Magnitude: 56.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported 4 to 6 inch tree limbs down near Abilene.

Thunderstorm Wind in JACKSON, KANSAS
From 13-AUG-10 16:51:00 to 13-AUG-10 16:56:00 (CST-6)
Location: HOYT
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Law Enforcement

Widespread tree and power line damage was reported near Hoyt.

Thunderstorm Wind in DOUGLAS, KANSAS
From 13-AUG-10 19:35:00 to 13-AUG-10 19:40:00 (CST-6)
Location: LAWRENCE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Sporadic tree and limb damage was reported throughout the city of Lawrence.

Thunderstorm Wind in BROWN, KANSAS
From 13-AUG-10 11:20:00 to 13-AUG-10 11:25:00 (CST-6)
Location: FAIRVIEW
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters near Fairview reported 60 to 70 mph wind gusts.

Thunderstorm Wind in GEARY, KANSAS
From 13-AUG-10 17:00:00 to 13-AUG-10 17:08:00 (CST-6)
Location: OLSON
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter near Dwight reported a 67 mph wind gust.

Thunderstorm Wind in MORRIS, KANSAS
From 13-AUG-10 18:11:00 to 13-AUG-10 18:16:00 (CST-6)
Location: WILSEY
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A law enforcement officer reported a power line down near Wilsey.