Supercell Thunderstorms developed along a stationary boundary and produced large tornadoes during the afternoon and evening of May 28th 2013.  2 tornadoes occurred in Nemaha county Kansas and at least 1 violent long lived tornado occurred in Ottawa County Kansas.  Amazingly no serious injuries and no fatalities were reported.  Later that night slow moving storms dumped 5 to 10 inches of rain across parts of Brown and Nemaha counties in Kansas.

Tornado in OTTAWA, KANSAS
From 28-MAY-13 16:45:00 to 28-MAY-13 17:45:00 (CST-6)
Location: LINDSEY
Tornado F-scale: EF3
Reported by: NWS Storm Survey

A large tornado developed around 545pm CDT and proceeded to move slowly east for approximately 2 miles before turning back to the west and south toward highway 18. The tornado was lost in rain and was not visible after approximately 630 pm however mobile doppler radar supplemental data indicates that this tornado likely persisted through around 645 pm CDT.  This tornado was nearly 1 mile wide at times and NWS damage survey found EF3 damage indicators suggesting winds to around 150 mph.  2 mobile doppler radars were within 5-6km of this tornado and did sample winds around and above 100m well in excess of 166 mph. In fact they measured winds of 247 mph at 100m! Nothing close to EF5 damage was revealed on the survey.  However, given the lack of damage indicators available within the track of the tornado we have incorporated the mobile doppler wind data into our assessment of the tornado strength and we believe that this tornado contained at least EF4 winds in excess of 166 mph.  We acknowledge the current directive which states that one cannot rate tornado intensity by non-damage data sources so we will enter this in as EF3 however we are stating in the comments that this was a violent tornado with most likely EF4 intensity at some point during its life. Amazingly no serious injuries or fatalities were reported.  However there were approximately 100 head of cattle that were killed by the tornado.

Hail in OTTAWA, KANSAS
From 28-MAY-13 16:30:00 to 28-MAY-13 16:33:00 (CST-6)
Location: LINDSEY
Magnitude: 3.50 
Reported by: Trained Spotter

High Wind in CLOUD, KANSAS
From 28-MAY-13 21:29:00 to 28-MAY-13 21:31:00 (CST-6)
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Concordia measured a non thunderstorm wind gusts.

Hail in WASHINGTON, KANSAS
From 28-MAY-13 17:35:00 to 28-MAY-13 17:36:00 (CST-6)
Location: BRANTFORD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WASHINGTON, KANSAS
From 28-MAY-13 17:45:00 to 28-MAY-13 17:46:00 (CST-6)
Location: MORROWVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in OTTAWA, KANSAS
From 28-MAY-13 17:45:00 to 28-MAY-13 17:47:00 (CST-6)
Location: LINDSEY
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in MARSHALL, KANSAS
From 28-MAY-13 17:45:00 to 28-MAY-13 17:46:00 (CST-6)
Location: WINIFRED
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BROWN, KANSAS
From 28-MAY-13 17:45:00 to 28-MAY-13 17:46:00 (CST-6)
Location: ROBINSON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in BROWN, KANSAS
From 28-MAY-13 17:45:00 to 28-MAY-13 17:47:00 (CST-6)
Location: ROBINSON
Magnitude: 63.00 MG
Reported by: Trained Spotter

Measured by spotter and small tree limbs down.

Flash Flood in OTTAWA, KANSAS
From 28-MAY-13 19:20:00 to 28-MAY-13 20:20:00 (CST-6)
Location: LINDSEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous roads flooded by running water.

Flash Flood in JACKSON, KANSAS
From 28-MAY-13 21:45:00 to 28-MAY-13 22:45:00 (CST-6)
Location: HOLTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Reports of moving water over the roadway near Q4 rd and 254th st.

Flash Flood in JACKSON, KANSAS
From 28-MAY-13 21:45:00 to 28-MAY-13 22:45:00 (CST-6)
Location: NETAWAKA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Reports of moving water over the roadway on K9 between Whiting and Netawaka.

Flash Flood in NEMAHA, KANSAS
From 29-MAY-13 01:05:00 to 29-MAY-13 02:05:00 (CST-6)
Location: CENTRALIA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Reports of of K187 closed near Centralia due to water over the roadway.

Hail in BROWN, KANSAS
From 28-MAY-13 17:54:00 to 28-MAY-13 17:57:00 (CST-6)
Location: ROBINSON
Magnitude: 2.00 
Reported by: Trained Spotter

Hail in BROWN, KANSAS
From 28-MAY-13 18:12:00 to 28-MAY-13 18:12:00 (CST-6)
Location: FAIRVIEW
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in OTTAWA, KANSAS
From 28-MAY-13 18:20:00 to 28-MAY-13 19:20:00 (CST-6)
Location: MINNEAPOLIS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The basement of a home was flooded with a couple inches of water.

Flash Flood in NEMAHA, KANSAS
From 29-MAY-13 01:05:00 to 29-MAY-13 02:05:00 (CST-6)
Location: SENECA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Report of water over roadway on K63 approx 2 miles north of US36 near Seneca.

Flash Flood in OTTAWA, KANSAS
From 28-MAY-13 18:35:00 to 28-MAY-13 19:35:00 (CST-6)
Location: CULVER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

At intersection of K106 and Evergreen road water flowing over road several inches deep for a stretch of 300 yards.

Hail in NEMAHA, KANSAS
From 28-MAY-13 19:30:00 to 28-MAY-13 19:30:00 (CST-6)
Location: KELLY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flood in BROWN, KANSAS
From 29-MAY-13 01:05:00 to 29-MAY-13 02:05:00 (CST-6)
Location: MERCIER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water over the roadway on 130th between Foxtail and Dewberrey on the Kickapoo reservation.

Flood in BROWN, KANSAS
From 29-MAY-13 01:05:00 to 29-MAY-13 02:05:00 (CST-6)
Location: ROBINSON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water over road on 250th between Sagebrush and Thrasher.

Flood in JACKSON, KANSAS
From 29-MAY-13 01:05:00 to 29-MAY-13 02:05:00 (CST-6)
Location: HOLTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Truck reported water over the roadway on US75 at mile marker 201.

Tornado in NEMAHA, KANSAS
From 28-MAY-13 15:20:00 to 28-MAY-13 15:20:00 (CST-6)
Location: CORNING
Tornado F-scale: EF1
Reported by: NWS Storm Survey

The resident of the EF-1 house south of the EF-3 farm described seeing several sub-tornadoes along with the main one.  It appears that a smaller satellite tornado hit this location producing EF1 damage to the south of the main strong tornado.  This would have been the 3rd tornado associated with this supercell.

Tornado in NEMAHA, KANSAS
From 28-MAY-13 15:45:00 to 28-MAY-13 15:45:00 (CST-6)
Location: CORNING
Tornado F-scale: EF1
Reported by: NWS Storm Survey

Brief touchdown with house and tree damage.  This was the last tornado associated with the supercell thunderstorm that produced the strong tornado to the west of Corning earlier.

Tornado in OTTAWA, KANSAS
From 28-MAY-13 16:33:00 to 28-MAY-13 16:33:00 (CST-6)
Location: CULVER
Tornado F-scale: EF0
Reported by: Broadcast Media

Video shows a brief rope tornado touch down around 533pm CDT nearly 12 minutes prior to the main violent tornado touch down.

Thunderstorm Wind in OTTAWA, KANSAS
From 29-MAY-13 15:45:00 to 29-MAY-13 15:47:00 (CST-6)
Location: CULVER
Magnitude: 52.00 EG
Reported by: Emergency Manager

Reports of several trees blown down.

Thunderstorm Wind in OTTAWA, KANSAS
From 29-MAY-13 16:00:00 to 29-MAY-13 16:02:00 (CST-6)
Location: LAMAR
Magnitude: 52.00 EG
Reported by: Trained Spotter

Winds estimated.

Flood in BROWN, KANSAS
From 29-MAY-13 01:27:00 to 29-MAY-13 02:27:00 (CST-6)
Location: ROBINSON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water over road on 250th between Sagebrush and Thrasher.

Hail in ANDERSON, KANSAS
From 28-MAY-13 11:22:00 to 28-MAY-13 11:22:00 (CST-6)
Location: HARRIS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in NEMAHA, KANSAS
From 28-MAY-13 15:05:00 to 28-MAY-13 15:07:00 (CST-6)
Location: CENTRALIA
Magnitude: 2.50 
Reported by: Law Enforcement

Hail in NEMAHA, KANSAS
From 28-MAY-13 14:35:00 to 28-MAY-13 14:36:00 (CST-6)
Location: CENTRALIA
Magnitude: 1.50 
Reported by: Trained Spotter

Hail in NEMAHA, KANSAS
From 28-MAY-13 15:20:00 to 28-MAY-13 15:22:00 (CST-6)
Location: KELLY
Magnitude: 4.00 
Reported by: Public

Time estimated from radar.

Hail in NEMAHA, KANSAS
From 28-MAY-13 15:37:00 to 28-MAY-13 15:38:00 (CST-6)
Location: ONEIDA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in OTTAWA, KANSAS
From 28-MAY-13 16:32:00 to 28-MAY-13 16:33:00 (CST-6)
Location: LINDSEY
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in OTTAWA, KANSAS
From 28-MAY-13 16:36:00 to 28-MAY-13 16:38:00 (CST-6)
Location: LINDSEY
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in OTTAWA, KANSAS
From 28-MAY-13 16:49:00 to 28-MAY-13 16:51:00 (CST-6)
Location: MINNEAPOLIS
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in OTTAWA, KANSAS
From 28-MAY-13 16:53:00 to 28-MAY-13 16:53:00 (CST-6)
Location: MINNEAPOLIS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MARSHALL, KANSAS
From 28-MAY-13 17:11:00 to 28-MAY-13 17:13:00 (CST-6)
Location: FRANKFORT
Magnitude: 1.50 
Reported by: Trained Spotter

Hail in CLOUD, KANSAS
From 28-MAY-13 17:14:00 to 28-MAY-13 17:15:00 (CST-6)
Location: ST JOSEPH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CLOUD, KANSAS
From 28-MAY-13 17:22:00 to 28-MAY-13 17:23:00 (CST-6)
Location: CLYDE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in NEMAHA, KANSAS
From 28-MAY-13 17:30:00 to 28-MAY-13 18:30:00 (CST-6)
Location: KELLY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Sheriff reports 96th road is flooded around Kelly, as well as north of Corning and Goff.

Tornado in NEMAHA, KANSAS
From 28-MAY-13 15:16:00 to 28-MAY-13 15:34:00 (CST-6)
Location: CENTRALIA
Tornado F-scale: EF3
Reported by: NWS Storm Survey

NWS storm survey indicated that a tornado touched down initially approximately 4 miles west of Corning.  The tornado became large and strong producing EF3 damage along its path.  It moved slowly and eventually turned north northeast before ending.  Maximum winds were estimated around 150 mph.

High Wind in CLOUD, KANSAS
From 28-MAY-13 18:38:00 to 28-MAY-13 18:40:00 (CST-6)
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Concordia Airport measured non thunderstorm wind gusts.

Thunderstorm Wind in OTTAWA, KANSAS
From 28-MAY-13 17:58:00 to 28-MAY-13 17:59:00 (CST-6)
Location: LINDSEY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winds estimated.