A storm system that moved through the area produced large hail, up to golfball size, and street flooding in parts of the metro area then spread east into the plains.  The hailstorm was the most costly of the summer season with with insured losses topping $213.3 million, according to the Rocky Mountain Insurance Information Association.
Insurance claims included 29,297 automobile claims worth more than $87.2 million and 14,287 property claims for $126 million, ranking the storm as the eighth most expensive to hit the state.  The storm also caused multiple accidents. A semi became detached from a trailer, blocking traffic on westbound Interstate 70 west of Tower Road.  Downed power poles blocked a roadway on CO 79 near Bennett, at mile marker 10.  In addition to the damaging winds, the storms produced large hail, from nickel to golfball size.  The intense thunderstorm winds also downed trees near Fort Morgan.  Flash flooding was reported over parts of northern Washington County.  The combination of flash flooding and an accident involving a semi-trailer forced the closure of CO 61 for a several hours.

Hail in DOUGLAS, COLORADO
From 29-SEP-14 13:20:00 to 29-SEP-14 13:20:00 (MST-7)
Location: HIGHLANDS RANCH
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in ARAPAHOE, COLORADO
From 29-SEP-14 13:58:00 to 29-SEP-14 13:58:00 (MST-7)
Location: (BKF)BUCKLEY AIR FORCE BASE
Magnitude: 1.00 
Reported by: ASOS

Hail in WASHINGTON, COLORADO
From 29-SEP-14 14:26:00 to 29-SEP-14 14:26:00 (MST-7)
Location: OTIS
Magnitude: 1.25 
Reported by: Storm Chaser

Hail in ARAPAHOE, COLORADO
From 29-SEP-14 14:05:00 to 29-SEP-14 14:05:00 (MST-7)
Location: (BKF)BUCKLEY AIR FORCE BASE
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in ARAPAHOE, COLORADO
From 29-SEP-14 13:32:00 to 29-SEP-14 13:32:00 (MST-7)
Location: CHERRY HILLS VLG
Magnitude: 0.88 
Reported by: Trained Spotter

Hail in WASHINGTON, COLORADO
From 29-SEP-14 14:42:00 to 29-SEP-14 14:42:00 (MST-7)
Location: OTIS
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in ARAPAHOE, COLORADO
From 29-SEP-14 13:43:00 to 29-SEP-14 13:43:00 (MST-7)
Location: (BKF)BUCKLEY AIR FORCE BASE
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in WASHINGTON, COLORADO
From 29-SEP-14 15:51:00 to 29-SEP-14 15:51:00 (MST-7)
Location: THURMAN
Magnitude: 1.00 
Reported by: Emergency Manager

Hail in MORGAN, COLORADO
From 29-SEP-14 15:57:00 to 29-SEP-14 15:57:00 (MST-7)
Location: FT MORGAN
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in ARAPAHOE, COLORADO
From 29-SEP-14 13:35:00 to 29-SEP-14 13:35:00 (MST-7)
Location: CENTENNIAL AIRPORT
Magnitude: 1.25 
Reported by: Trained Spotter

Thunderstorm Wind in ADAMS, COLORADO
From 29-SEP-14 14:30:00 to 29-SEP-14 14:30:00 (MST-7)
Location: MANILA
Magnitude: 70.00 EG
Reported by: Department of Highways

Thunderstorm winds downed power poles along CO 79.

Hail in DOUGLAS, COLORADO
From 29-SEP-14 13:26:00 to 29-SEP-14 13:26:00 (MST-7)
Location: HIGHLANDS RANCH
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in ARAPAHOE, COLORADO
From 29-SEP-14 13:33:00 to 29-SEP-14 13:33:00 (MST-7)
Location: CENTENNIAL AIRPORT
Magnitude: 1.00 
Reported by: Trained Spotter

Thunderstorm Wind in MORGAN, COLORADO
From 29-SEP-14 16:09:00 to 29-SEP-14 16:09:00 (MST-7)
Location: FT MORGAN
Magnitude: 50.00 MG
Reported by: AWOS

Hail in ARAPAHOE, COLORADO
From 29-SEP-14 13:42:00 to 29-SEP-14 13:42:00 (MST-7)
Location: (BKF)BUCKLEY AIR FORCE BASE
Magnitude: 1.50 
Reported by: Trained Spotter

Hail in ELBERT, COLORADO
From 29-SEP-14 13:51:00 to 29-SEP-14 13:51:00 (MST-7)
Location: ELIZABETH
Magnitude: 1.00 
Reported by: Amateur Radio

Thunderstorm Wind in LINCOLN, COLORADO
From 29-SEP-14 16:44:00 to 29-SEP-14 16:44:00 (MST-7)
Location: HUGO
Magnitude: 66.00 MG
Reported by: Trained Spotter

Hail in ARAPAHOE, COLORADO
From 29-SEP-14 13:34:00 to 29-SEP-14 13:34:00 (MST-7)
Location: CENTENNIAL AIRPORT
Magnitude: 1.75 
Property damage: 213.30M
Reported by: Trained Spotter

Flash Flood in WASHINGTON, COLORADO
From 29-SEP-14 20:45:00 to 29-SEP-14 22:00:00 (MST-7)
Location: BURDETT
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 100.00K
Reported by: Trained Spotter

Strong thunderstorms producing up to 4 inches of rainfall, caused flash flooding.  State Highway 61 was closed following an accident involving a semi-truck.  Several sections of the highway experienced flooding.  Extensive flooding was also observed in fields and ditches north and west along the highway towards Sterling.  Several county roads were reportedly washed out.

Hail in ARAPAHOE, COLORADO
From 29-SEP-14 13:55:00 to 29-SEP-14 13:55:00 (MST-7)
Location: (BKF)BUCKLEY AIR FORCE BASE
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in ELBERT, COLORADO
From 29-SEP-14 14:05:00 to 29-SEP-14 14:05:00 (MST-7)
Location: ELIZABETH
Magnitude: 1.75 
Reported by: Trained Spotter

Thunderstorm Wind in MORGAN, COLORADO
From 29-SEP-14 16:06:00 to 29-SEP-14 16:06:00 (MST-7)
Location: FT MORGAN
Magnitude: 61.00 EG
Reported by: Law Enforcement

Intense thunderstorm winds downed some trees in Fort Morgan.