A frontal boundary slowly pushed north across eastern Colorado during the afternoon hours before shifting east into western Kansas and extreme southwest Nebraska during the evening hours. Storms formed along and north of the front and moved across eastern Colorado producing tornadoes, up to golf ball sized hail, and up to 60 mph wind gusts.

Thunderstorm Wind in KIT CARSON, COLORADO
From 27-APR-21 15:55:00 to 27-APR-21 15:55:00 (MST-7)
Location: STRATTON
Magnitude: 52.00 EG
Reported by: Public

A supercell thunderstorm developed and moved across northern Kit Carson County, producing estimated 60 mph wind gusts.

Thunderstorm Wind in CHEYENNE, COLORADO
From 27-APR-21 16:01:00 to 27-APR-21 16:03:00 (MST-7)
Location: KIT CARSON
Magnitude: 52.00 EG
Reported by: Trained Spotter

An embedded supercell at the southern edge of a line of storms produced estimated 60 mph wind gusts for a duration of two minutes along County Road 22.

Hail in YUMA, COLORADO
From 27-APR-21 16:15:00 to 27-APR-21 16:15:00 (MST-7)
Location: CLARKVILLE
Magnitude: 0.88 
Reported by: Trained Spotter

A supercell thunderstorm moved into northwest Yuma County producing dime to nickel sized hail.

Hail in KIT CARSON, COLORADO
From 27-APR-21 16:05:00 to 27-APR-21 16:15:00 (MST-7)
Location: STRATTON
Magnitude: 1.75 
Reported by: Emergency Manager

A supercell thunderstorm developed and moved across northern Kit Carson County producing golf ball sized hail for a duration of ten minutes.

Hail in YUMA, COLORADO
From 27-APR-21 17:28:00 to 27-APR-21 17:28:00 (MST-7)
Location: BONNY LAKE
Magnitude: 0.88 
Reported by: Trained Spotter

An embedded supercell thunderstorm produced nickel sized hail that was beginning to cover the ground at the time of the report.

Hail in YUMA, COLORADO
From 27-APR-21 17:30:00 to 27-APR-21 17:30:00 (MST-7)
Location: BONNY LAKE
Magnitude: 1.00 
Reported by: Social Media

An embedded supercell thunderstorm produced quarter sized hail as it traveled along the Kit Carson and Yuma county line.

Hail in YUMA, COLORADO
From 27-APR-21 17:45:00 to 27-APR-21 17:45:00 (MST-7)
Location: HALE BONNY DAM ARPT
Magnitude: 1.00 
Reported by: Trained Spotter

An embedded supercell thunderstorm produced quarter sized hail and strong winds gusting up to 45 mph as the storm traveled along the Kit Carson and Yuma county line near the Colorado/Kansas state line.

Hail in YUMA, COLORADO
From 27-APR-21 17:48:00 to 27-APR-21 17:48:00 (MST-7)
Location: HALE BONNY DAM ARPT
Magnitude: 1.50 
Reported by: Social Media

An embedded supercell thunderstorm produced up to ping pong ball sized hail as the storm traveled along the Kit Carson and Yuma county line near the Colorado/Kansas state line.

Tornado in CHEYENNE, COLORADO
From 27-APR-21 15:08:00 to 27-APR-21 15:18:00 (MST-7)
Location: AROYA
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

First of several tornadoes that occurred in quick succession. This was the larger initial one that was captured by storm chaser footage and reported by law enforcement.

Tornado in CHEYENNE, COLORADO
From 27-APR-21 15:08:00 to 27-APR-21 15:11:00 (MST-7)
Location: WILD HORSE
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

This second tornado occurred simultaneously with a larger tornado (first tornado entered). This one was visually smaller according to storm chaser footage.

Hail in KIT CARSON, COLORADO
From 27-APR-21 15:28:00 to 27-APR-21 15:28:00 (MST-7)
Location: FLAGLER ARPT
Magnitude: 0.88 
Reported by: Public

A line of thunderstorms moved into western Kit Carson County, producing pea to nickel sized hail.

Tornado in CHEYENNE, COLORADO
From 27-APR-21 15:15:00 to 27-APR-21 15:17:00 (MST-7)
Location: SORRENTO
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Chaser footage showed a smaller satellite tornado to the parent circulation. This tornado began, and was immediately followed by a much larger tornado. This is the third tornado produced by this storm in short succession.

Tornado in CHEYENNE, COLORADO
From 27-APR-21 15:16:00 to 27-APR-21 15:25:00 (MST-7)
Location: SORRENTO
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

This is the fourth tornado that occurred in rapid succession. This tornado, visually from storm chaser stream, was the largest tornado of the day. It continued across open country of southwestern Cheyenne County Colorado. A satellite tornado began shortly before this one, which was the third tornado of the day.

Tornado in CHEYENNE, COLORADO
From 27-APR-21 16:27:00 to 27-APR-21 16:34:00 (MST-7)
Location: FIRSTVIEW
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Landspout tornado, multiple reports received along with video of tornado near the intersection of county roads DD and 32 in northern Cheyenne County.

Tornado in CHEYENNE, COLORADO
From 27-APR-21 15:54:00 to 27-APR-21 16:00:00 (MST-7)
Location: SORRENTO
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm chaser submitted video, on social media, of a tornado crossing US HWY 40 west of Kit Carson.

Tornado in CHEYENNE, COLORADO
From 27-APR-21 15:28:00 to 27-APR-21 15:32:00 (MST-7)
Location: SORRENTO
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Tornadoes viewed on live chase stream. Based on photos/videos submitted, as well as radar imagery, believe this to be the fifth tornado produced by this storm.

Hail in KIT CARSON, COLORADO
From 27-APR-21 16:05:00 to 27-APR-21 16:09:00 (MST-7)
Location: STRATTON
Magnitude: 1.75 
Reported by: Public

A supercell thunderstorm developed and moved across northern Kit Carson County, producing ping pong to golf ball sized hail over a duration of four minutes. The caller noticed over the duration that the hail became smaller in size and fell heavier.