Severe thunderstorms produced large hail, from quarter to golfball size, and damaging winds across Arapahoe, Boulder, Elbert and Jefferson Counties.  Flash flooding was reported in central Jefferson County.   Heavy rainfall produced street flooding in Denver with some basement flooding reported as well.  The strong winds downed trees and power lines.  One man was injured by a nearby lightning strike in Arvada.  Lightning also sparked a small attic fire in Castle Pines and caused brief electrical outages in Denver.

Lightning in DOUGLAS, COLORADO
From 07-JUL-14 19:00:00 to 07-JUL-14 19:00:00 (MST-7)
Location: CASTLE ROCK
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Lightning struck a home and sparked a small fire in the attic.

Lightning in DENVER, COLORADO
From 07-JUL-14 19:10:00 to 07-JUL-14 19:30:00 (MST-7)
Location: DENVER
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Lightning caused a power outage that affected the RTD light rail lines C, D, E, H and W for a short time.

Hail in ELBERT, COLORADO
From 07-JUL-14 19:04:00 to 07-JUL-14 19:04:00 (MST-7)
Location: AGATE
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in BOULDER, COLORADO
From 07-JUL-14 19:09:00 to 07-JUL-14 19:09:00 (MST-7)
Location: VALMONT
Magnitude: 1.50 
Reported by: Trained Spotter

Hail in ELBERT, COLORADO
From 07-JUL-14 19:09:00 to 07-JUL-14 19:09:00 (MST-7)
Location: AGATE
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in BOULDER, COLORADO
From 07-JUL-14 19:15:00 to 07-JUL-14 19:15:00 (MST-7)
Location: LOUISVILLE
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in BOULDER, COLORADO
From 07-JUL-14 19:18:00 to 07-JUL-14 19:18:00 (MST-7)
Location: LOUISVILLE
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in JEFFERSON, COLORADO
From 07-JUL-14 19:38:00 to 07-JUL-14 19:38:00 (MST-7)
Location: ARVADA
Magnitude: 1.25 
Reported by: Trained Spotter

Thunderstorm Wind in ARAPAHOE, COLORADO
From 07-JUL-14 20:25:00 to 07-JUL-14 20:25:00 (MST-7)
Location: LITTLETON
Magnitude: 60.00 EG
Reported by: Trained Spotter

An intense thunderstorm wind snapped tree branches, up to two inches in diameter.

Thunderstorm Wind in ARAPAHOE, COLORADO
From 07-JUL-14 19:45:00 to 07-JUL-14 19:45:00 (MST-7)
Location: LITTLETON
Magnitude: 52.00 EG
Reported by: Trained Spotter

Large tree branches, greater than two inches in diameter, were broken.

Hail in JEFFERSON, COLORADO
From 07-JUL-14 19:42:00 to 07-JUL-14 19:42:00 (MST-7)
Location: ARVADA
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in JEFFERSON, COLORADO
From 07-JUL-14 19:40:00 to 07-JUL-14 19:40:00 (MST-7)
Location: ARVADA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JEFFERSON, COLORADO
From 07-JUL-14 19:39:00 to 07-JUL-14 19:39:00 (MST-7)
Location: ARVADA
Magnitude: 1.75 
Reported by: Trained Spotter

Thunderstorm Wind in JEFFERSON, COLORADO
From 07-JUL-14 19:35:00 to 07-JUL-14 19:35:00 (MST-7)
Location: ARVADA
Magnitude: 61.00 EG
Reported by: Trained Spotter

A wet microburst snapped tree limbs up to six inches in diameter.

Lightning in JEFFERSON, COLORADO
From 07-JUL-14 19:00:00 to 07-JUL-14 19:00:00 (MST-7)
Location: ARVADA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A man was injured by a nearby lightning strike while he  recorded a video of a thunderstorm with his cell phone.  He was standing in his garage, when a nearby lightning bolt knocked him out.  He suffered overall body aches and had a ringing sensation in one of his ears.

Flash Flood in JEFFERSON, COLORADO
From 07-JUL-14 20:15:00 to 07-JUL-14 21:15:00 (MST-7)
Location: EVERGREEN
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Heavy rainfall, nearly two inches in one hour, flooded several residences.  In addition, several bridges along Forest Estate Road were washed out.