April 3, 2011, was an abnormally warm day, with high temperatues in the 80s and 90s. Record high temperatures were broken in several locations. A slow moving cold front, combined with a very strong spring storm system, produced widespread damaging thunderstorms, in the late afternoon and evening hours.
Supercellular thunderstorms, developed along and ahead of the cold front, as it sank southward across the area. These thunderstorms produced extremely large hail, greater than golf balls in many areas, as well as damaging winds of 60 to 80 mph.
The hardest hit areas, included areas from Leavenworth County south to Linn County.

Hail in ATCHISON, KANSAS
From 03-APR-11 19:41:00 to 03-APR-11 19:41:00 (CST-6)
Location: RICHMOND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ATCHISON, KANSAS
From 03-APR-11 18:51:00 to 03-APR-11 18:51:00 (CST-6)
Location: ATCHISON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LEAVENWORTH, KANSAS
From 03-APR-11 18:49:00 to 03-APR-11 18:49:00 (CST-6)
Location: LANSING
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in LEAVENWORTH, KANSAS
From 03-APR-11 18:34:00 to 03-APR-11 18:34:00 (CST-6)
Location: LEAVENWORTH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in LINN, KANSAS
From 03-APR-11 21:48:00 to 03-APR-11 21:48:00 (CST-6)
Location: MOUND CITY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown over just north of Mound City on Highway 7. Thunderstorm wind gusts were estimated up to 60 mph.

Hail in LINN, KANSAS
From 03-APR-11 20:45:00 to 03-APR-11 20:45:00 (CST-6)
Location: PARKER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MIAMI, KANSAS
From 03-APR-11 20:40:00 to 03-APR-11 20:40:00 (CST-6)
Location: BEAGLE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LINN, KANSAS
From 03-APR-11 20:39:00 to 03-APR-11 20:39:00 (CST-6)
Location: PARKER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in LEAVENWORTH, KANSAS
From 03-APR-11 19:04:00 to 03-APR-11 19:04:00 (CST-6)
Location: BASEHOR
Magnitude: 61.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds were estimated up to 70 mph. Shingles were blown off several homes. A 14 inch diameter tree was snapped in half. A 10x10 feet metal shed was destroyed near 153rd and Briarwood.

Thunderstorm Wind in LEAVENWORTH, KANSAS
From 03-APR-11 19:11:00 to 03-APR-11 19:11:00 (CST-6)
Location: BASEHOR
Magnitude: 61.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Emergency Manager

Power outages were caused by thunderstorm wind gusts estimated up to 70 mph. Debris was reported in the power lines.

Thunderstorm Wind in LINN, KANSAS
From 03-APR-11 20:50:00 to 03-APR-11 20:50:00 (CST-6)
Location: LA CYGNE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm wind gusts were estimated up to 70 mph. Tree limbs up to 6 inches in diameter were reported down.

Hail in JOHNSON, KANSAS
From 03-APR-11 20:15:00 to 03-APR-11 20:15:00 (CST-6)
Location: LACKMANS
Magnitude: 1.75 
Property damage: 80.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Roof damage was reported.

Hail in JOHNSON, KANSAS
From 03-APR-11 20:04:00 to 03-APR-11 20:04:00 (CST-6)
Location: PROVENCE VLG
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in JOHNSON, KANSAS
From 03-APR-11 19:59:00 to 03-APR-11 19:59:00 (CST-6)
Location: SPRING HILL
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JOHNSON, KANSAS
From 03-APR-11 20:00:00 to 03-APR-11 20:00:00 (CST-6)
Location: GARDNER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JOHNSON, KANSAS
From 03-APR-11 19:56:00 to 03-APR-11 19:56:00 (CST-6)
Location: LACKMANS
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JOHNSON, KANSAS
From 03-APR-11 20:15:00 to 03-APR-11 20:15:00 (CST-6)
Location: LEAWOOD
Magnitude: 1.50 
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Roof damage was reported.

Hail in JOHNSON, KANSAS
From 03-APR-11 20:06:00 to 03-APR-11 20:06:00 (CST-6)
Location: OLATHE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in JOHNSON, KANSAS
From 03-APR-11 20:05:00 to 03-APR-11 20:05:00 (CST-6)
Location: LEAWOOD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee