Severe thunderstorm produced hail, ranging in size from nickel to half dollar size.  Heavy rain combined with a torrent of hail flooded streets and stalled vehicles in Fort Collins.  The hail accumulated to more than 6 inches in spots, clogged storm drains and caused street flooding.  The floodwaters were reportedly in excess of a foot deep in some places.  Police blocked several intersections in the city as a safety precaution.

Hail in LARIMER, COLORADO
From 22-MAY-18 17:10:00 to 22-MAY-18 17:10:00 (MST-7)
Location: DRAKES
Magnitude: 0.88 
Reported by: CoCoRaHS

Hail in LARIMER, COLORADO
From 22-MAY-18 17:15:00 to 22-MAY-18 17:15:00 (MST-7)
Location: DRAKES
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in BOULDER, COLORADO
From 22-MAY-18 17:35:00 to 22-MAY-18 17:35:00 (MST-7)
Location: PINECLIFFE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail in BOULDER, COLORADO
From 22-MAY-18 17:57:00 to 22-MAY-18 17:57:00 (MST-7)
Location: BOULDER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LARIMER, COLORADO
From 22-MAY-18 16:57:00 to 22-MAY-18 16:57:00 (MST-7)
Location: DRAKES
Magnitude: 0.88 
Reported by: CoCoRaHS

Hail in LARIMER, COLORADO
From 22-MAY-18 16:59:00 to 22-MAY-18 16:59:00 (MST-7)
Location: DRAKES
Magnitude: 1.00 
Reported by: Public

Hail in LARIMER, COLORADO
From 22-MAY-18 16:59:00 to 22-MAY-18 16:59:00 (MST-7)
Location: DRAKES
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail in LARIMER, COLORADO
From 22-MAY-18 17:00:00 to 22-MAY-18 17:00:00 (MST-7)
Location: DRAKES
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in LARIMER, COLORADO
From 22-MAY-18 17:01:00 to 22-MAY-18 17:01:00 (MST-7)
Location: DRAKES
Magnitude: 0.88 
Reported by: Trained Spotter

Hail in LARIMER, COLORADO
From 22-MAY-18 17:05:00 to 22-MAY-18 17:05:00 (MST-7)
Location: DRAKES
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BOULDER, COLORADO
From 22-MAY-18 16:30:00 to 22-MAY-18 16:30:00 (MST-7)
Location: LONGMONT MUNI ARPT
Magnitude: 0.88 
Reported by: Trained Spotter

Hail in BOULDER, COLORADO
From 22-MAY-18 16:20:00 to 22-MAY-18 16:20:00 (MST-7)
Location: LONGMONT
Magnitude: 1.00 
Reported by: Storm Chaser

Hail in BOULDER, COLORADO
From 22-MAY-18 16:22:00 to 22-MAY-18 16:22:00 (MST-7)
Location: LONGMONT
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in BOULDER, COLORADO
From 22-MAY-18 16:30:00 to 22-MAY-18 16:30:00 (MST-7)
Location: LONGMONT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BOULDER, COLORADO
From 22-MAY-18 16:25:00 to 22-MAY-18 16:25:00 (MST-7)
Location: HIGHLAND
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in WELD, COLORADO
From 22-MAY-18 16:30:00 to 22-MAY-18 16:30:00 (MST-7)
Location: MEAD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail in LARIMER, COLORADO
From 22-MAY-18 16:37:00 to 22-MAY-18 16:37:00 (MST-7)
Location: BERTHOUD
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in LARIMER, COLORADO
From 22-MAY-18 16:40:00 to 22-MAY-18 16:40:00 (MST-7)
Location: MASONVILLE
Magnitude: 0.88 
Reported by: CoCoRaHS