Severe thunderstorms broke out across parts of Adams, Arapahoe, Denver, Lincoln, Morgan and Weld counties during the late afternoon and early evening.  In Weld County, very large hail from 1 1/2 to 3 inches in diameter was reported along with wind gusts to 60 mph.  Elsewhere, the hail size ranged from 3/4 to 1 1/4 inches in diameter.  A total of five tornadoes touched down in open country with no damage reported.  At Denver International Airport, up to 3 inches of hail accumulated on runway surfaces.  Consequently, dozens of flights were either delayed or cancelled so runways could be cleared and airplanes inspected for hail damage.

Hail in ARAPAHOE, COLORADO
From 26-MAY-19 16:10:00 to 26-MAY-19 16:10:00 (MST-7)
Location: AURORA CHERRY CREEK
Magnitude: 1.00 
Reported by: Insurance Company

Hail in DENVER, COLORADO
From 26-MAY-19 16:05:00 to 26-MAY-19 16:05:00 (MST-7)
Location: GLENDALE
Magnitude: 1.00 
Reported by: Insurance Company

Hail in DENVER, COLORADO
From 26-MAY-19 16:51:00 to 26-MAY-19 16:51:00 (MST-7)
Location: (DEN)DENVER INTL ARP
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Denver Tower reported that 3 inches of hail had accumulated on airport operating surfaces, which caused flight delays.

Hail in ADAMS, COLORADO
From 26-MAY-19 15:20:00 to 26-MAY-19 15:20:00 (MST-7)
Location: BARR LAKE
Magnitude: 1.25 
Reported by: Storm Chaser

Hail in WELD, COLORADO
From 26-MAY-19 15:33:00 to 26-MAY-19 15:33:00 (MST-7)
Location: EVANS
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in WELD, COLORADO
From 26-MAY-19 17:35:00 to 26-MAY-19 17:35:00 (MST-7)
Location: BUCKINGHAM
Magnitude: 3.00 
Reported by: Storm Chaser

Hail in WELD, COLORADO
From 26-MAY-19 17:37:00 to 26-MAY-19 17:37:00 (MST-7)
Location: BUCKINGHAM
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tornado in WELD, COLORADO
From 26-MAY-19 15:38:00 to 26-MAY-19 15:38:00 (MST-7)
Location: KEENESBURG
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

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

Tornado in WELD, COLORADO
From 26-MAY-19 16:27:00 to 26-MAY-19 16:32:00 (MST-7)
Location: PAWNEE BUTTES
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 reported.

Tornado in WELD, COLORADO
From 26-MAY-19 15:53:00 to 26-MAY-19 15:53:00 (MST-7)
Location: ROGGEN
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 reported.

Tornado in ADAMS, COLORADO
From 26-MAY-19 16:37:00 to 26-MAY-19 16:37:00 (MST-7)
Location: DENVER FRONT RANGE A
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 reported.

Hail in WELD, COLORADO
From 26-MAY-19 14:52:00 to 26-MAY-19 14:52:00 (MST-7)
Location: FT LUPTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MORGAN, COLORADO
From 26-MAY-19 15:00:00 to 26-MAY-19 15:00:00 (MST-7)
Location: ORCHARD
Magnitude: 1.25 
Reported by: Trained Spotter

Tornado in LINCOLN, COLORADO
From 26-MAY-19 16:58:00 to 26-MAY-19 17:08:00 (MST-7)
Location: HUGO
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

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

Thunderstorm Wind in WELD, COLORADO
From 26-MAY-19 15:32:00 to 26-MAY-19 15:32:00 (MST-7)
Location: KEENESBURG
Magnitude: 52.00 MG
Reported by: Mesonet

Hail in WELD, COLORADO
From 26-MAY-19 15:13:00 to 26-MAY-19 15:13:00 (MST-7)
Location: HUDSON
Magnitude: 1.25 
Reported by: Storm Chaser

Hail in WELD, COLORADO
From 26-MAY-19 15:27:00 to 26-MAY-19 15:27:00 (MST-7)
Location: KEENESBURG
Magnitude: 1.50 
Reported by: Trained Spotter