Severe thunderstorms produced large hail, from penny to tennis ball size across parts of Jefferson, Adams, Arapahoe, Denver and Washington counties.  The hail along with heavy rain caused flooding and flash flooding problems.  In Adams County, widespread hail accumulated up to 6 inches deep on the roadways between Watkins and Bennett, with localized accumulations up to a foot reported. Highway 36 was closed due to flooding between Watkins and Schumaker Road. Numerous vehicles were stranded with reports of roads washed out and active water rescues.  One motorist south of Roggen died when he ignored a barricade and drove into floodwaters.  South Strasburg, intense straight-line winds snapped a power pole.

Hail in ARAPAHOE, COLORADO
From 29-JUN-23 15:30:00 to 29-JUN-23 15:30:00 (MST-7)
Location: (BKF)BUCKLEY AIR FORCE BASE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DENVER, COLORADO
From 29-JUN-23 15:07:00 to 29-JUN-23 15:07:00 (MST-7)
Location: DENVER
Magnitude: 1.25 
Reported by: Public

Hail in DENVER, COLORADO
From 29-JUN-23 15:07:00 to 29-JUN-23 15:07:00 (MST-7)
Location: DENVER
Magnitude: 1.00 
Reported by: Public

Hail in DENVER, COLORADO
From 29-JUN-23 17:19:00 to 29-JUN-23 17:19:00 (MST-7)
Location: GLENDALE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WASHINGTON, COLORADO
From 29-JUN-23 00:20:00 to 29-JUN-23 00:20:00 (MST-7)
Location: OTIS
Magnitude: 2.50 
Reported by: Public

Hail in ARAPAHOE, COLORADO
From 29-JUN-23 15:35:00 to 29-JUN-23 15:35:00 (MST-7)
Location: (BKF)BUCKLEY AIR FORCE BASE
Magnitude: 2.00 
Reported by: Public

Flash Flood in DENVER, COLORADO
From 29-JUN-23 14:20:00 to 29-JUN-23 15:20:00 (MST-7)
Location: DENVER
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A car was stranded on Interstate 70 below Federal Blvd overpass, with approximately 1 foot of water covering several lanes.

Hail in DENVER, COLORADO
From 29-JUN-23 14:48:00 to 29-JUN-23 14:48:00 (MST-7)
Location: DENVER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in ARAPAHOE, COLORADO
From 29-JUN-23 15:25:00 to 29-JUN-23 15:25:00 (MST-7)
Location: (BKF)BUCKLEY AIR FORCE BASE
Magnitude: 1.50 
Reported by: Public

Hail in ARAPAHOE, COLORADO
From 29-JUN-23 15:23:00 to 29-JUN-23 15:23:00 (MST-7)
Location: (BKF)BUCKLEY AIR FORCE BASE
Magnitude: 1.50 
Reported by: Public

Hail in DENVER, COLORADO
From 29-JUN-23 14:46:00 to 29-JUN-23 14:46:00 (MST-7)
Location: DENVER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ADAMS, COLORADO
From 29-JUN-23 15:20:00 to 29-JUN-23 15:20:00 (MST-7)
Location: AURORA
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in JEFFERSON, COLORADO
From 29-JUN-23 14:42:00 to 29-JUN-23 14:42:00 (MST-7)
Location: MORRISON
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in JEFFERSON, COLORADO
From 29-JUN-23 15:07:00 to 29-JUN-23 15:07:00 (MST-7)
Location: WHEAT RIDGE
Magnitude: 1.25 
Reported by: Public

Hail in JEFFERSON, COLORADO
From 29-JUN-23 15:10:00 to 29-JUN-23 15:10:00 (MST-7)
Location: WHEAT RIDGE
Magnitude: 1.50 
Reported by: Public

Hail in ADAMS, COLORADO
From 29-JUN-23 15:24:00 to 29-JUN-23 15:24:00 (MST-7)
Location: AURORA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ADAMS, COLORADO
From 29-JUN-23 15:28:00 to 29-JUN-23 15:28:00 (MST-7)
Location: AURORA
Magnitude: 1.25 
Reported by: Public

Hail in ADAMS, COLORADO
From 29-JUN-23 18:05:00 to 29-JUN-23 18:05:00 (MST-7)
Location: SHAMROCK
Magnitude: 1.00 
Reported by: Public

Flood in WELD, COLORADO
From 30-JUN-23 07:00:00 to 30-JUN-23 08:00:00 (MST-7)
Location: PROSPECT VALLEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A person was killed after the car they were driving was swept away by floodwaters.  The accident occurred near Weld County Roads 73 and 16 .  The occupant of the car drove past the roadblocks that are there to prevent vehicles from entering the dangerous floodwaters in the area.  The car was found floating in the water with a driver inside the car. In total, there were six vehicles submerged into floodwaters, six human rescues, and five police dog rescues performed by deputies.

Hail in ARAPAHOE, COLORADO
From 29-JUN-23 15:41:00 to 29-JUN-23 15:41:00 (MST-7)
Location: (BKF)BUCKLEY AIR FORCE BASE
Magnitude: 1.00 
Reported by: Public

Thunderstorm Wind in ARAPAHOE, COLORADO
From 29-JUN-23 16:30:00 to 29-JUN-23 16:30:00 (MST-7)
Location: BYERS
Magnitude: 70.00 EG
Property damage: 4.00K
Reported by: Public

Intense thunderstorm winds snapped a power pole.

Hail in DENVER, COLORADO
From 29-JUN-23 14:46:00 to 29-JUN-23 14:46:00 (MST-7)
Location: DENVER
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in JEFFERSON, COLORADO
From 29-JUN-23 14:34:00 to 29-JUN-23 14:34:00 (MST-7)
Location: MORRISON
Magnitude: 1.50 
Reported by: NWS Employee

Hail in JEFFERSON, COLORADO
From 29-JUN-23 14:54:00 to 29-JUN-23 14:54:00 (MST-7)
Location: LAKEWOOD
Magnitude: 1.25 
Reported by: Trained Spotter

Flash Flood in DENVER, COLORADO
From 29-JUN-23 14:21:00 to 29-JUN-23 15:21:00 (MST-7)
Location: DENVER
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Heavy rain produced up to a foot of standing water at 23rd Avenue and I-25.

Hail in ADAMS, COLORADO
From 29-JUN-23 16:16:00 to 29-JUN-23 16:16:00 (MST-7)
Location: WATKINS
Magnitude: 1.50 
Reported by: Trained Spotter

Hail in ADAMS, COLORADO
From 29-JUN-23 17:24:00 to 29-JUN-23 17:24:00 (MST-7)
Location: BENNETT
Magnitude: 2.00 
Reported by: Trained Spotter

Hail in ADAMS, COLORADO
From 29-JUN-23 16:24:00 to 29-JUN-23 16:24:00 (MST-7)
Location: BENNETT
Magnitude: 1.50 
Reported by: Public

Hail in ADAMS, COLORADO
From 29-JUN-23 15:58:00 to 29-JUN-23 16:28:00 (MST-7)
Location: DENVER FRONT RANGE A
Magnitude: 1.25 
Reported by: Public

Hail in DENVER, COLORADO
From 29-JUN-23 14:57:00 to 29-JUN-23 14:57:00 (MST-7)
Location: DENVER
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in DENVER, COLORADO
From 29-JUN-23 14:45:00 to 29-JUN-23 14:45:00 (MST-7)
Location: DENVER
Magnitude: 1.00 
Reported by: Public

Hail in DENVER, COLORADO
From 29-JUN-23 15:08:00 to 29-JUN-23 15:08:00 (MST-7)
Location: DENVER
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in DENVER, COLORADO
From 29-JUN-23 15:07:00 to 29-JUN-23 15:07:00 (MST-7)
Location: DENVER
Magnitude: 1.75 
Reported by: Trained Spotter

Flash Flood in ADAMS, COLORADO
From 29-JUN-23 18:00:00 to 29-JUN-23 18:00:00 (MST-7)
Location: DENVER FRONT RANGE A
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Highway 36 was closed due to flooding between Watkins and Schumaker Road.  At least 6 vehicles were stranded with reports of roads washed out and active water rescues in progress.

Flash Flood in DENVER, COLORADO
From 29-JUN-23 14:30:00 to 29-JUN-23 15:30:00 (MST-7)
Location: DENVER
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Extensive street flooding with water depth estimated at 1 to 2 feet, covering the entire intersection and sidewalks.

Hail in ADAMS, COLORADO
From 29-JUN-23 17:00:00 to 29-JUN-23 17:00:00 (MST-7)
Location: MANILA
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in ADAMS, COLORADO
From 29-JUN-23 15:18:00 to 29-JUN-23 15:18:00 (MST-7)
Location: AURORA
Magnitude: 1.00 
Reported by: Public

Hail in ARAPAHOE, COLORADO
From 29-JUN-23 16:20:00 to 29-JUN-23 16:20:00 (MST-7)
Location: (BKF)BUCKLEY AIR FORCE BASE
Magnitude: 1.75 
Reported by: Trained Spotter