On May 12th 2010, a strong storm system affected the Southern and Central Plains.  In the National Weather Service Topeka Kansas County Warning Area (CWA), a warm front hovered east-west just to the south of Interstate 70 most of the day, while a cold front extended from Dickinson county into South Central Kansas.  Late in the afternoon, severe thunderstorms developed along the cold front, and moved northeastward across east central Kansas.  In the Topeka CWA, most reports of large hail and damaging winds occurred along or south of the Kansas Turnpike.  Elsewhere in the Topeka CWA, several storms produced hail 1/2 inch in diameter or smaller, and winds of 40 to 50 mph.
A National Weather Service storm survey team joined Douglas County Emergency Management in the field the afternoon of May 13th to assess wind damage in southern Douglas County.  A farmstead sustained damage to several sheds, wooden structures, trees, and a concrete silo.  Tin from the sheds was blown approximately 1/4 mile downstream.  Due to the unidirectional damage path, the survey team determined the damage had been caused by 75-80 mph straight line winds.

Hail in DOUGLAS, KANSAS
From 12-MAY-10 18:28:00 to 12-MAY-10 18:28:00 (CST-6)
Location: BALDWIN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WABAUNSEE, KANSAS
From 12-MAY-10 18:34:00 to 12-MAY-10 18:34:00 (CST-6)
Location: BRADFORD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LYON, KANSAS
From 12-MAY-10 20:35:00 to 12-MAY-10 20:35:00 (CST-6)
Location: ALLEN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

This report was relayed to the office via KVOE.

Flash Flood in SHAWNEE, KANSAS
From 12-MAY-10 21:25:00 to 12-MAY-10 22:25:00 (CST-6)
Location: TOPEKA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

There was street flooding on 6th Street, east of Branner Trafficway.

Thunderstorm Wind in DOUGLAS, KANSAS
From 12-MAY-10 22:08:00 to 12-MAY-10 22:12:00 (CST-6)
Location: PLEASANT GROVE
Magnitude: 56.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: County Official

A tree was blown down across Highway 59 at intersection with North 600 Road.

Thunderstorm Wind in DOUGLAS, KANSAS
From 12-MAY-10 22:12:00 to 12-MAY-10 22:16:00 (CST-6)
Location: PLEASANT GROVE
Magnitude: 56.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: County Official

Power lines are down 2 miles northwest of Vinland.

Thunderstorm Wind in OSAGE, KANSAS
From 12-MAY-10 17:15:00 to 12-MAY-10 17:18:00 (CST-6)
Location: PETERTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter near Osage City reported an estimated 60 mph wind gust.

Thunderstorm Wind in WABAUNSEE, KANSAS
From 12-MAY-10 18:34:00 to 12-MAY-10 18:37:00 (CST-6)
Location: HARVEYVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

A county official reported an estimated 60 mph wind gust near Harveyville.

Thunderstorm Wind in DOUGLAS, KANSAS
From 12-MAY-10 21:57:00 to 12-MAY-10 21:57:00 (CST-6)
Location: LAWRENCE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A National Weather Service employee reported an estimated 60 mph wind gust.

Flash Flood in SHAWNEE, KANSAS
From 12-MAY-10 21:52:00 to 12-MAY-10 22:52:00 (CST-6)
Location: TOPEKA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Water was reported in the intersection of 24th Street and Macvicar Avenue.

Hail in DOUGLAS, KANSAS
From 12-MAY-10 17:56:00 to 12-MAY-10 17:56:00 (CST-6)
Location: BALDWIN ARPT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DOUGLAS, KANSAS
From 12-MAY-10 18:25:00 to 12-MAY-10 18:25:00 (CST-6)
Location: BALDWIN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in WABAUNSEE, KANSAS
From 12-MAY-10 22:00:00 to 12-MAY-10 23:00:00 (CST-6)
Location: HARVEYVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Water was crossing portions of K31 Highway near Harveyville.

Hail in FRANKLIN, KANSAS
From 12-MAY-10 17:42:00 to 12-MAY-10 17:42:00 (CST-6)
Location: RICHTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in SHAWNEE, KANSAS
From 12-MAY-10 21:52:00 to 12-MAY-10 22:52:00 (CST-6)
Location: TOPEKA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

The intersection of 6th Street and Tyler Street is impassable due to flooding.

Flash Flood in SHAWNEE, KANSAS
From 12-MAY-10 22:00:00 to 12-MAY-10 23:00:00 (CST-6)
Location: TOPEKA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Cars are stuck in the water at 29th Street and Kansas Avenue in Topeka.

Thunderstorm Wind in LYON, KANSAS
From 12-MAY-10 18:03:00 to 12-MAY-10 18:09:00 (CST-6)
Location: EMPORIA
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Two 12 inch diameter tree limbs were down.  This report was relayed to the office from KVOE.

Thunderstorm Wind in DOUGLAS, KANSAS
From 12-MAY-10 22:00:00 to 12-MAY-10 22:07:00 (CST-6)
Location: GLOBE
Magnitude: 70.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A cement block silo was blown down.  Several grain bins and tin sheds were damaged.  Tin debris was blown nearly a quarter of a mile downstream.  The house on the farm property had several windows broken out on its southern side.  Several tree branches around 6 inches in diameter were blown down as well.  The survey team estimated 75 to 80 mph winds at the residence.

Thunderstorm Wind in DOUGLAS, KANSAS
From 12-MAY-10 22:05:00 to 12-MAY-10 22:11:00 (CST-6)
Location: GLOBE
Magnitude: 70.00 EG
Property damage: 2.50K
Crop damage: 0.00K
Reported by: County Official

Several power poles were blown down along East 550 Road and Highway 56 near Baldwin City.

Thunderstorm Wind in DOUGLAS, KANSAS
From 12-MAY-10 22:05:00 to 12-MAY-10 22:09:00 (CST-6)
Location: BALDWIN ARPT
Magnitude: 61.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Public

Several trees were snapped on the property.  The windmill was blown down.  Barns were damaged. Report was taken from local newspaper.