Very large hail, up to 3 inches in diameter, pummeled portions of the Front Range Urban Corridor and extended across the northeast plains of Colorado.   Reports of collapsed roofs due to hail were reported, with major hail damage across northern portions of the Denver metro area.   The Rocky Mountain Insurance Information Association estimated the property damage from the storm totaled $276.4 million, making it the 8th costliest hailstorm to strike the state to date.  Frontage roads along Interstate 76 northeast of Denver were also flooded and washed out.  In Lincoln County, large hail in the Arriba and Genoa areas damaged vehicles along Interstate 70. A total of four short-lived tornadoes touched down in the open country of Lincoln and Weld counties.  Thunderstorms in Lincoln County also produced damaging wind gusts up to 70 mph.

Hail in LARIMER, COLORADO
From 19-JUN-18 15:28:00 to 19-JUN-18 15:28:00 (MST-7)
Location: FT COLLINS
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in WASHINGTON, COLORADO
From 19-JUN-18 15:40:00 to 19-JUN-18 15:40:00 (MST-7)
Location: ELBA
Magnitude: 1.00 
Reported by: CoCoRaHS

Hail in LARIMER, COLORADO
From 19-JUN-18 15:53:00 to 19-JUN-18 15:53:00 (MST-7)
Location: LAPORTE
Magnitude: 1.75 
Reported by: Public

Hail in PHILLIPS, COLORADO
From 19-JUN-18 16:05:00 to 19-JUN-18 16:05:00 (MST-7)
Location: HOLYOKE
Magnitude: 1.00 
Reported by: Public

Hail in ARAPAHOE, COLORADO
From 19-JUN-18 17:38:00 to 19-JUN-18 17:38:00 (MST-7)
Location: (BKF)BUCKLEY AIR FORCE BASE
Magnitude: 0.88 
Reported by: Trained Spotter

Hail in MORGAN, COLORADO
From 19-JUN-18 17:38:00 to 19-JUN-18 17:38:00 (MST-7)
Location: FT MORGAN
Magnitude: 1.00 
Reported by: Trained Spotter

Tornado in WELD, COLORADO
From 19-JUN-18 13:16:00 to 19-JUN-18 13:19:00 (MST-7)
Location: PROSPECT VALLEY
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tornado touched down briefly in an open field.  No damage was observed.

Tornado in LINCOLN, COLORADO
From 19-JUN-18 15:48:00 to 19-JUN-18 15:49:00 (MST-7)
Location: (LIC)LIMON ARPT
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

A tornado touched down briefly in an open field.  No damage was observed.

Tornado in LINCOLN, COLORADO
From 19-JUN-18 15:52:00 to 19-JUN-18 15:53:00 (MST-7)
Location: LIMON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tornado touched down briefly in an open field.  No damage was observed.

Tornado in LINCOLN, COLORADO
From 19-JUN-18 16:11:00 to 19-JUN-18 16:12:00 (MST-7)
Location: GENOA
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

A tornado touched down briefly in an open field.  No damage was observed.

Thunderstorm Wind in LINCOLN, COLORADO
From 19-JUN-18 15:47:00 to 19-JUN-18 15:47:00 (MST-7)
Location: LIMON
Magnitude: 52.00 EG
Reported by: Law Enforcement

Minor damage was observed.

Thunderstorm Wind in LINCOLN, COLORADO
From 19-JUN-18 15:47:00 to 19-JUN-18 15:47:00 (MST-7)
Location: (LIC)LIMON ARPT
Magnitude: 61.00 MG
Reported by: ASOS

Thunderstorm Wind in ELBERT, COLORADO
From 19-JUN-18 15:48:00 to 19-JUN-18 15:48:00 (MST-7)
Location: CEDAR PT
Magnitude: 54.00 MG
Reported by: Mesonet

Hail in BOULDER, COLORADO
From 19-JUN-18 11:40:00 to 19-JUN-18 11:40:00 (MST-7)
Location: NIWOT
Magnitude: 1.00 
Reported by: CoCoRaHS

Hail in BOULDER, COLORADO
From 19-JUN-18 11:43:00 to 19-JUN-18 11:43:00 (MST-7)
Location: LONGMONT
Magnitude: 1.25 
Reported by: Public

Hail in LARIMER, COLORADO
From 19-JUN-18 11:47:00 to 19-JUN-18 11:47:00 (MST-7)
Location: VIRGINIA DALE
Magnitude: 1.75 
Reported by: CoCoRaHS

Large hail broke windows.

Hail in BOULDER, COLORADO
From 19-JUN-18 11:50:00 to 19-JUN-18 11:50:00 (MST-7)
Location: NIWOT
Magnitude: 1.50 
Reported by: CoCoRaHS

Hail in LARIMER, COLORADO
From 19-JUN-18 11:55:00 to 19-JUN-18 11:55:00 (MST-7)
Location: THE FORKS
Magnitude: 2.00 
Reported by: CoCoRaHS

Hail in WELD, COLORADO
From 19-JUN-18 11:55:00 to 19-JUN-18 11:55:00 (MST-7)
Location: WINDSOR
Magnitude: 1.50 
Reported by: NWS Employee

Hail in WELD, COLORADO
From 19-JUN-18 11:58:00 to 19-JUN-18 11:58:00 (MST-7)
Location: FIRESTONE
Magnitude: 1.50 
Reported by: Public

Hail in WELD, COLORADO
From 19-JUN-18 12:00:00 to 19-JUN-18 12:00:00 (MST-7)
Location: FIRESTONE
Magnitude: 1.25 
Reported by: Public

Hail in WELD, COLORADO
From 19-JUN-18 12:00:00 to 19-JUN-18 12:00:00 (MST-7)
Location: GREELEY
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in BOULDER, COLORADO
From 19-JUN-18 12:01:00 to 19-JUN-18 12:01:00 (MST-7)
Location: LONGMONT MUNI ARPT
Magnitude: 1.25 
Reported by: NWS Employee

Hail in DENVER, COLORADO
From 19-JUN-18 12:01:00 to 19-JUN-18 12:01:00 (MST-7)
Location: DENVER
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in JEFFERSON, COLORADO
From 19-JUN-18 12:01:00 to 19-JUN-18 12:01:00 (MST-7)
Location: MORRISON
Magnitude: 1.00 
Reported by: Public

Hail in ARAPAHOE, COLORADO
From 19-JUN-18 12:04:00 to 19-JUN-18 12:04:00 (MST-7)
Location: SOUTH GLENN
Magnitude: 1.75 
Reported by: Public

Hail in ARAPAHOE, COLORADO
From 19-JUN-18 12:05:00 to 19-JUN-18 12:05:00 (MST-7)
Location: SOUTH GLENN
Magnitude: 1.75 
Reported by: CoCoRaHS

Hail in JEFFERSON, COLORADO
From 19-JUN-18 12:07:00 to 19-JUN-18 12:07:00 (MST-7)
Location: MORRISON
Magnitude: 1.00 
Reported by: Amateur Radio

Hail in WELD, COLORADO
From 19-JUN-18 12:12:00 to 19-JUN-18 12:12:00 (MST-7)
Location: GREELEY
Magnitude: 1.75 
Reported by: Emergency Manager

Hail in ARAPAHOE, COLORADO
From 19-JUN-18 12:15:00 to 19-JUN-18 12:15:00 (MST-7)
Location: GREENWOOD VLG
Magnitude: 2.00 
Reported by: Public

Hail in ARAPAHOE, COLORADO
From 19-JUN-18 12:15:00 to 19-JUN-18 12:15:00 (MST-7)
Location: LITTLETON
Magnitude: 1.00 
Reported by: Amateur Radio

Hail in WELD, COLORADO
From 19-JUN-18 12:15:00 to 19-JUN-18 12:15:00 (MST-7)
Location: FIRESTONE
Magnitude: 1.00 
Reported by: CoCoRaHS

Hail in WELD, COLORADO
From 19-JUN-18 12:22:00 to 19-JUN-18 12:22:00 (MST-7)
Location: FT LUPTON
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in ARAPAHOE, COLORADO
From 19-JUN-18 12:25:00 to 19-JUN-18 12:25:00 (MST-7)
Location: AURORA CHERRY CREEK
Magnitude: 1.25 
Reported by: Public

Hail in ARAPAHOE, COLORADO
From 19-JUN-18 12:25:00 to 19-JUN-18 12:25:00 (MST-7)
Location: ENGLEWOOD
Magnitude: 3.00 
Property damage: 276.40M
Reported by: CoCoRaHS

The property estimate value was the total storm damage summary for the event.

Hail in DENVER, COLORADO
From 19-JUN-18 12:25:00 to 19-JUN-18 12:25:00 (MST-7)
Location: (DEN)DENVER INTL ARP
Magnitude: 1.75 
Reported by: CoCoRaHS

Hail in ARAPAHOE, COLORADO
From 19-JUN-18 12:30:00 to 19-JUN-18 12:30:00 (MST-7)
Location: GREENWOOD VLG
Magnitude: 2.75 
Reported by: NWS Employee

Hail in WELD, COLORADO
From 19-JUN-18 12:30:00 to 19-JUN-18 12:30:00 (MST-7)
Location: BARNESVILLE
Magnitude: 1.00 
Reported by: CoCoRaHS

Hail in DENVER, COLORADO
From 19-JUN-18 12:33:00 to 19-JUN-18 12:33:00 (MST-7)
Location: GLENDALE
Magnitude: 2.00 
Reported by: NWS Employee

Hail in ARAPAHOE, COLORADO
From 19-JUN-18 12:35:00 to 19-JUN-18 12:35:00 (MST-7)
Location: SMOKY HILL
Magnitude: 1.00 
Reported by: Public

Hail in ARAPAHOE, COLORADO
From 19-JUN-18 12:39:00 to 19-JUN-18 12:39:00 (MST-7)
Location: ARAPAHOE PARK
Magnitude: 1.25 
Reported by: Amateur Radio

Hail in ARAPAHOE, COLORADO
From 19-JUN-18 12:39:00 to 19-JUN-18 12:39:00 (MST-7)
Location: AURORA CHERRY CREEK
Magnitude: 1.25 
Reported by: Public

Hail in ARAPAHOE, COLORADO
From 19-JUN-18 12:40:00 to 19-JUN-18 12:40:00 (MST-7)
Location: SMOKY HILL
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in ARAPAHOE, COLORADO
From 19-JUN-18 12:40:00 to 19-JUN-18 12:40:00 (MST-7)
Location: AURORA CHERRY CREEK
Magnitude: 2.50 
Reported by: Trained Spotter

Hail in ARAPAHOE, COLORADO
From 19-JUN-18 12:45:00 to 19-JUN-18 12:45:00 (MST-7)
Location: SMOKY HILL
Magnitude: 2.00 
Reported by: Public

Hail in WELD, COLORADO
From 19-JUN-18 12:46:00 to 19-JUN-18 12:46:00 (MST-7)
Location: HUDSON
Magnitude: 2.00 
Reported by: Trained Spotter

Hail in ARAPAHOE, COLORADO
From 19-JUN-18 12:47:00 to 19-JUN-18 12:47:00 (MST-7)
Location: (BKF)BUCKLEY AIR FORCE BASE
Magnitude: 1.00 
Reported by: Amateur Radio

Hail in WELD, COLORADO
From 19-JUN-18 12:49:00 to 19-JUN-18 12:49:00 (MST-7)
Location: HUDSON
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in ARAPAHOE, COLORADO
From 19-JUN-18 13:00:00 to 19-JUN-18 13:00:00 (MST-7)
Location: (BKF)BUCKLEY AIR FORCE BASE
Magnitude: 2.50 
Reported by: NWS Employee

Hail in PARK, COLORADO
From 19-JUN-18 13:00:00 to 19-JUN-18 13:00:00 (MST-7)
Location: LAKE GEORGE
Magnitude: 2.75 
Reported by: NWS Employee

Hail in ARAPAHOE, COLORADO
From 19-JUN-18 13:06:00 to 19-JUN-18 13:06:00 (MST-7)
Location: ARAPAHOE PARK
Magnitude: 2.75 
Reported by: Public

Hail in LARIMER, COLORADO
From 19-JUN-18 13:22:00 to 19-JUN-18 13:22:00 (MST-7)
Location: WELLINGTON
Magnitude: 1.50 
Reported by: Amateur Radio

Hail in LARIMER, COLORADO
From 19-JUN-18 13:35:00 to 19-JUN-18 13:35:00 (MST-7)
Location: OWL CANYON
Magnitude: 1.50 
Reported by: Amateur Radio

Hail covered to road, up to 3 inches in depth.

Hail in WELD, COLORADO
From 19-JUN-18 13:55:00 to 19-JUN-18 13:55:00 (MST-7)
Location: PIERCE
Magnitude: 1.50 
Reported by: CoCoRaHS

Hail in WELD, COLORADO
From 19-JUN-18 14:02:00 to 19-JUN-18 14:02:00 (MST-7)
Location: NUNN
Magnitude: 1.75 
Reported by: CoCoRaHS

Hail in DOUGLAS, COLORADO
From 19-JUN-18 14:18:00 to 19-JUN-18 14:18:00 (MST-7)
Location: THE PINERY
Magnitude: 1.00 
Reported by: CoCoRaHS

Hail in DOUGLAS, COLORADO
From 19-JUN-18 14:30:00 to 19-JUN-18 14:30:00 (MST-7)
Location: PARKER
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in LARIMER, COLORADO
From 19-JUN-18 15:05:00 to 19-JUN-18 15:05:00 (MST-7)
Location: DRAKES
Magnitude: 1.00 
Reported by: CoCoRaHS

Hail in WASHINGTON, COLORADO
From 19-JUN-18 15:08:00 to 19-JUN-18 15:08:00 (MST-7)
Location: THURMAN
Magnitude: 1.25 
Reported by: CoCoRaHS

Hail in LARIMER, COLORADO
From 19-JUN-18 15:12:00 to 19-JUN-18 15:12:00 (MST-7)
Location: DRAKES
Magnitude: 1.00 
Reported by: Public

Hail in WASHINGTON, COLORADO
From 19-JUN-18 15:14:00 to 19-JUN-18 15:14:00 (MST-7)
Location: THURMAN
Magnitude: 1.00 
Reported by: CoCoRaHS

Hail in ELBERT, COLORADO
From 19-JUN-18 15:17:00 to 19-JUN-18 15:17:00 (MST-7)
Location: CEDAR PT
Magnitude: 2.00 
Reported by: Trained Spotter

Hail in ELBERT, COLORADO
From 19-JUN-18 15:17:00 to 19-JUN-18 15:17:00 (MST-7)
Location: AGATE
Magnitude: 1.75 
Reported by: Public

Large hail broke several windows.

Hail in ELBERT, COLORADO
From 19-JUN-18 15:17:00 to 19-JUN-18 15:17:00 (MST-7)
Location: AGATE
Magnitude: 1.75 
Reported by: Amateur Radio

Hail in LARIMER, COLORADO
From 19-JUN-18 15:19:00 to 19-JUN-18 15:19:00 (MST-7)
Location: FT COLLINS
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in LARIMER, COLORADO
From 19-JUN-18 15:24:00 to 19-JUN-18 15:24:00 (MST-7)
Location: FT COLLINS
Magnitude: 1.50 
Reported by: Public

Hail in WASHINGTON, COLORADO
From 19-JUN-18 15:25:00 to 19-JUN-18 15:25:00 (MST-7)
Location: THURMAN
Magnitude: 1.75 
Reported by: CoCoRaHS