A complex of intense thunderstorms moved southeast across Yuma county into northwest Kansas during the evening.  One tornado developed in Yuma county, and a large swath of golf ball to baseball sized hail fell.

Hail in YUMA, COLORADO
From 21-JUN-10 17:30:00 to 21-JUN-10 17:30:00 (MST-7)
Location: CLARKVILLE
Magnitude: 2.50 
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Public reported multiple windows were broken.

Hail in YUMA, COLORADO
From 21-JUN-10 18:45:00 to 21-JUN-10 19:00:00 (MST-7)
Location: ECKLEY
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 11.20M
Reported by: State Official

Hail damaged an area roughly 14 miles long by 5 miles wide, resulting in partial to complete damage of corn, wheat and bean crops.

Hail in YUMA, COLORADO
From 21-JUN-10 19:10:00 to 21-JUN-10 19:45:00 (MST-7)
Location: IDALIA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 3.52M
Reported by: State Official

Hail swath occurred just north of Idalia and extended ENE to the state line.  Crops were damaged in a 2 mile wide by 11 mile long stretch.

Hail in YUMA, COLORADO
From 21-JUN-10 17:59:00 to 21-JUN-10 17:59:00 (MST-7)
Location: ECKLEY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in YUMA, COLORADO
From 21-JUN-10 18:10:00 to 21-JUN-10 18:15:00 (MST-7)
Location: ABARR
Magnitude: 70.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Trees and power lines were down 3 miles west of highway 20 and road U.

Thunderstorm Wind in YUMA, COLORADO
From 21-JUN-10 18:30:00 to 21-JUN-10 18:30:00 (MST-7)
Location: VERNON
Magnitude: 61.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Trained Spotter

Power pole partially bent over near Road Z and Road 19.

Hail in YUMA, COLORADO
From 21-JUN-10 19:10:00 to 21-JUN-10 19:10:00 (MST-7)
Location: IDALIA
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in YUMA, COLORADO
From 21-JUN-10 18:20:00 to 21-JUN-10 18:20:00 (MST-7)
Location: VERNON
Magnitude: 69.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter was located near tornado as it passed south of Vernon.

Tornado in YUMA, COLORADO
From 21-JUN-10 18:10:00 to 21-JUN-10 18:30:00 (MST-7)
Location: VERNON
Tornado F-scale: EF1
Property damage: 380.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tornado developed about 6 miles SW of Vernon and tracked southeast, dissipating just west of Beecher Island.  Winds estimated at 100 mph in the Rear Flank downdraft just south of the tornado also caused extensive damage.  forty eight utility poles were downed, three irrigation pivots were overturned, a barn was destroyed, several trailer homes were damaged, and the roof of the small auditorium in Beecher Island was heavily damaged.

Hail in YUMA, COLORADO
From 21-JUN-10 17:25:00 to 21-JUN-10 17:48:00 (MST-7)
Location: YUMA
Magnitude: 2.75 
Property damage: 50.00K
Crop damage: 6.72M
Reported by: Trained Spotter

A supercell thunderstorm produced reports of a swath of hail from 1 west of Yuma to 3 east of Yuma with multiple reports of 2.75 inch diameter hail.  In addition, it is estimated that over 26,000 acres of crops were damaged or destroyed.  Many windows were broken in homes and vehicles.