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. As the storms moved out of Colorado, they evolved into a line with embedded supercell thunderstorms that moved across northwest Kansas. The line of  storms produced up to tea cup sized hail and up to 70 mph wind gusts. Damage to evergreen tree limbs and a roof occurred on a property along the Colorado/Kansas state line in Cheyenne County due to large hail and thunderstorm wind gusts.

Hail in CHEYENNE, KANSAS
From 27-APR-21 19:00:00 to 27-APR-21 19:00:00 (CST-6)
Location: ST FRANCIS ARPT
Magnitude: 3.00 
Property damage: 20.00K
Reported by: Public

A strong embedded supercell thunderstorm produced tea cup sized hail as it crossed the Colorado/Kansas state line. The large hail damaged the roof of a home at the location of the report.

Thunderstorm Wind in CHEYENNE, KANSAS
From 27-APR-21 19:00:00 to 27-APR-21 19:00:00 (CST-6)
Location: ST FRANCIS ARPT
Magnitude: 61.00 EG
Property damage: 0.50K
Reported by: Public

A strong embedded supercell thunderstorm produced strong winds estimated at 60-70 mph as it crossed the Colorado/Kansas state line. The strong winds were able to snap off a few tree limbs of an unknown size off evergreen trees at the location.

Hail in CHEYENNE, KANSAS
From 27-APR-21 19:20:00 to 27-APR-21 19:25:00 (CST-6)
Location: ST FRANCIS
Magnitude: 1.00 
Reported by: Emergency Manager

An embedded supercell thunderstorm produced quarter sized hail in the city of St. Francis for a duration of five minutes. Multiple reports were received for hail in the city from the public and the Cheyenne County Emergency Manager.

Hail in CHEYENNE, KANSAS
From 27-APR-21 19:15:00 to 27-APR-21 19:25:00 (CST-6)
Location: ST FRANCIS
Magnitude: 0.75 
Reported by: Trained Spotter

An embedded supercell thunderstorm produced various sized hail from pea to penny in size. The trained spotter reported the ground became completely covered as the hail fell for a duration of ten minutes.

Hail in CHEYENNE, KANSAS
From 27-APR-21 19:09:00 to 27-APR-21 19:09:00 (CST-6)
Location: ST FRANCIS ARPT
Magnitude: 0.75 
Reported by: Public

An embedded supercell thunderstorm produced pea to penny sized hail along the southern extent of the hail core.

Hail in CHEYENNE, KANSAS
From 27-APR-21 19:15:00 to 27-APR-21 19:15:00 (CST-6)
Location: ST FRANCIS
Magnitude: 1.50 
Reported by: Social Media

An embedded supercell thunderstorm produced large hail varying in size from quarters to ping pong ball in size. Most of the hailstones were quarter in size or smaller with a few ping pong balls mixed in.

Hail in SHERMAN, KANSAS
From 27-APR-21 18:18:00 to 27-APR-21 18:23:00 (MST-7)
Location: KANORADO ARPT
Magnitude: 1.00 
Reported by: Trained Spotter

An embedded supercell thunderstorm produced quarter sized hail for a duration of five minutes. A trained spotter also reported the ground was covered in hail.

Hail in CHEYENNE, KANSAS
From 27-APR-21 19:00:00 to 27-APR-21 19:00:00 (CST-6)
Location: ST FRANCIS ARPT
Magnitude: 1.50 
Reported by: Emergency Manager

An embedded supercell produced ping pong ball sized hail as it crossed the Colorado/Kansas state line.

Hail in CHEYENNE, KANSAS
From 27-APR-21 19:25:00 to 27-APR-21 19:25:00 (CST-6)
Location: WHEELER
Magnitude: 0.75 
Reported by: Public

Hail in CHEYENNE, KANSAS
From 27-APR-21 19:30:00 to 27-APR-21 19:30:00 (CST-6)
Location: BIRD CITY
Magnitude: 0.75 
Reported by: Trained Spotter

Hail in CHEYENNE, KANSAS
From 27-APR-21 19:35:00 to 27-APR-21 19:35:00 (CST-6)
Location: ST FRANCIS
Magnitude: 1.00 
Reported by: Social Media

Enough quarter sized hail fell to cover the ground.

Hail in RAWLINS, KANSAS
From 27-APR-21 20:09:00 to 27-APR-21 20:09:00 (CST-6)
Location: BEARDSLEY
Magnitude: 0.88 
Reported by: Public

Thunderstorm Wind in RAWLINS, KANSAS
From 27-APR-21 19:42:00 to 27-APR-21 19:42:00 (CST-6)
Location: MC DONALD
Magnitude: 52.00 EG
Reported by: Trained Spotter

A line of thunderstorms moved into western Rawlins County producing estimated 50-60 mph winds.

Hail in CHEYENNE, KANSAS
From 27-APR-21 19:35:00 to 27-APR-21 19:35:00 (CST-6)
Location: BIRD CITY
Magnitude: 1.00 
Reported by: Social Media

Hail in RAWLINS, KANSAS
From 27-APR-21 19:42:00 to 27-APR-21 19:42:00 (CST-6)
Location: MC DONALD
Magnitude: 0.75 
Reported by: Trained Spotter

A line of thunderstorms produced up to penny sized hail as it entered western Rawlins County.