Late in the afternoon through the evening a slow moving group of severe storms moved through part of Northwest Kansas underneath an upper level disturbance.  This setup was favorable for the development of four weak, short-lived tornadoes in Wichita county.  Since the tornadoes remained in open country no damage was reported with them.  Large hail was very common with these storms.  The largest hail size was 4.25 inches in diameter reported in south central Logan County.  The prolonged heavy rainfall from the storms led to flash flooding along the Highway 25 corridor in northern Wichita and southern Logan counties.

Hail in WICHITA, KANSAS
From 21-MAY-16 17:00:00 to 21-MAY-16 17:11:00 (CST-6)
Location: ST THERESA
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The hail size during this period ranged from quarter to ping-pong ball in size.

Hail in LOGAN, KANSAS
From 21-MAY-16 17:22:00 to 21-MAY-16 17:22:00 (CST-6)
Location: RUSSELL SPGS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in LOGAN, KANSAS
From 21-MAY-16 17:25:00 to 21-MAY-16 17:25:00 (CST-6)
Location: MC ALLASTER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WICHITA, KANSAS
From 21-MAY-16 19:58:00 to 21-MAY-16 19:58:00 (CST-6)
Location: ST THERESA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in THOMAS, KANSAS
From 21-MAY-16 22:00:00 to 21-MAY-16 22:00:00 (CST-6)
Location: BREWSTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The hail sizes ranged from nickel to quarter size.

Hail in LOGAN, KANSAS
From 21-MAY-16 20:05:00 to 21-MAY-16 20:05:00 (CST-6)
Location: RUSSELL SPGS
Magnitude: 4.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in WICHITA, KANSAS
From 21-MAY-16 18:21:00 to 21-MAY-16 18:22:00 (CST-6)
Location: ST THERESA
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

The video from a storm chaser of this tornado shows the tornado lasting less than a minute over an open field.  Radar data of this tornado shows the tornadic rotation moving northeast.  The location of the tornado is halfway between CR G and CR F just west of CR 10.

Tornado in WICHITA, KANSAS
From 21-MAY-16 18:05:00 to 21-MAY-16 18:06:00 (CST-6)
Location: ST THERESA
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

The video of this tornado from storm chasers shows the tornado lasting less than a minute.  The tornado occurred northeast of the CR F and CR 10 intersection.  The tornadic circulation on radar indicates the tornado moved northeast during its lifetime.  No damage was reported with this tornado since it remained over an open field.

Tornado in WICHITA, KANSAS
From 21-MAY-16 19:15:00 to 21-MAY-16 19:16:00 (CST-6)
Location: ST THERESA
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a brief tornado and no damage.  The tornadic circulation on radar indicated the tornado was moving toward the northeast.  The path of the tornado was in between CR D and CR B just east of CR 13 close to a farm.

Tornado in WICHITA, KANSAS
From 21-MAY-16 18:13:00 to 21-MAY-16 18:14:00 (CST-6)
Location: ST THERESA
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Video of this tornado from storm chasers shows the tornado lasting a minute as it quickly moves from west to east, crossing Highway 25.  The tornado quickly dissipates after crossing the highway.  No damage was seen due to the tornado remaining over open fields.

Hail in WICHITA, KANSAS
From 21-MAY-16 17:54:00 to 21-MAY-16 17:54:00 (CST-6)
Location: ST THERESA
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Estimated time of report from radar and size of hail stone from the picture on social media.

Hail in WICHITA, KANSAS
From 21-MAY-16 17:55:00 to 21-MAY-16 18:11:00 (CST-6)
Location: ST THERESA
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The hail sizes ranged from quarter to tennis ball size during this period.

Hail in WICHITA, KANSAS
From 21-MAY-16 18:15:00 to 21-MAY-16 18:15:00 (CST-6)
Location: ST THERESA
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LOGAN, KANSAS
From 21-MAY-16 19:12:00 to 21-MAY-16 19:12:00 (CST-6)
Location: RUSSELL SPGS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flash Flood in WICHITA, KANSAS
From 21-MAY-16 18:10:00 to 21-MAY-16 21:30:00 (CST-6)
Location: ST THERESA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rainfall from slow moving and training thunderstorms produced rainfall rates of an inch or more per hour for three consecutive hours.  Total estimated rainfall amounts were around 3 to 5 inches over the flash flood area.  The Emergency Manager estimated there to be four inches of water over Highway 25 where the highway crosses Chalk Creek in far northern Wichita county just south of the county line.  This was reported an hour after the rainfall had ended.

Flash Flood in LOGAN, KANSAS
From 21-MAY-16 18:50:00 to 21-MAY-16 22:30:00 (CST-6)
Location: RUSSELL SPGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rainfall from slow moving training thunderstorms produced rainfall rates of an inch or more per hour for three consecutive hours with estimated rainfall amounts around three to five inches over the flash flood area.  The Emergency Manager estimated eight inches of water over Highway 25 where the highway crosses Twin Butte Creek.  This was reported an hour after the rainfall had ended.

Hail in WICHITA, KANSAS
From 21-MAY-16 17:16:00 to 21-MAY-16 18:00:00 (CST-6)
Location: ST THERESA
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The hail sizes during this period ranged from nickel to hen egg size.