A quasi-linear convective system moved through east central Kansas and west central Missouri producing multiple QLCS tornadoes and significant damage associated with numerous mesovortices. Interestingly, there was a supercell ahead of the line that also produced a tornado. Also, this line of storms produced extreme rain rates and widespread flash flooding was reported throughout the Kansas City area.

Flash Flood in CLINTON, MISSOURI
From 17-MAY-15 01:18:00 to 17-MAY-15 07:18:00 (CST-6)
Location: GRIDLEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

One to two feet of water flowing over Highway 69 near the Elks Lodge, closing the road.

Thunderstorm Wind in JOHNSON, MISSOURI
From 16-MAY-15 23:30:00 to 16-MAY-15 23:30:00 (CST-6)
Location: CENTERVIEW
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Two to three inch live limb blow down with numerous dead branches blown across the yard.

Thunderstorm Wind in BATES, MISSOURI
From 16-MAY-15 22:49:00 to 16-MAY-15 22:49:00 (CST-6)
Location: AMORET
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

A tree, 12 to 18 inches in diameter, was knocked down.

Thunderstorm Wind in JOHNSON, MISSOURI
From 16-MAY-15 23:38:00 to 16-MAY-15 23:38:00 (CST-6)
Location: HOLDEN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Trees were damaged near Highway 58 and 1001st street.

Flash Flood in JACKSON, MISSOURI
From 17-MAY-15 00:17:00 to 17-MAY-15 06:17:00 (CST-6)
Location: KANSAS CITY DOWNTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Reported via social media. Several ramps and underpasses on Highway 9 were impassable and there was standing water on Highway 169 south heading into the Kansas City.

Flash Flood in CLAY, MISSOURI
From 17-MAY-15 01:58:00 to 17-MAY-15 07:58:00 (CST-6)
Location: KEARNEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A water rescue was performed at 172nd St and Bishop Rd.

Flash Flood in JACKSON, MISSOURI
From 17-MAY-15 02:08:00 to 17-MAY-15 06:08:00 (CST-6)
Location: KANSAS CITY DOWNTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Several water rescues were performed in the East Bottoms area of Kansas City.

Flash Flood in CALDWELL, MISSOURI
From 17-MAY-15 02:10:00 to 17-MAY-15 06:10:00 (CST-6)
Location: KINGSTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Highway 13 just south of Kingston is impassible and closed due to high water.

Flash Flood in CLINTON, MISSOURI
From 17-MAY-15 02:34:00 to 17-MAY-15 06:34:00 (CST-6)
Location: GRIDLEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

NE 324th St was closed due to the several feet of water flowing over the road.

Thunderstorm Wind in CALDWELL, MISSOURI
From 16-MAY-15 23:34:00 to 16-MAY-15 23:34:00 (CST-6)
Location: HAMILTON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter estimated 70 mph winds snapping 6 to 8 inch tree limbs.

Thunderstorm Wind in JOHNSON, MISSOURI
From 16-MAY-15 23:51:00 to 16-MAY-15 23:51:00 (CST-6)
Location: WARRENSBURG
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Power lines were blown down near 7th Street Terrace and Vest.

Thunderstorm Wind in DAVIESS, MISSOURI
From 16-MAY-15 23:44:00 to 16-MAY-15 23:44:00 (CST-6)
Location: JAMESPORT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The emergency manager relayed a report from the public of winds in excess of 60 mph with power flickering.

Thunderstorm Wind in DAVIESS, MISSOURI
From 16-MAY-15 23:50:00 to 16-MAY-15 23:50:00 (CST-6)
Location: BANCROFT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Tree limbs were blown down.

Thunderstorm Wind in PETTIS, MISSOURI
From 17-MAY-15 00:20:00 to 17-MAY-15 00:20:00 (CST-6)
Location: LA MONTE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The emergency manager relayed a report of 60 mph estimated winds with pea size hail.

Thunderstorm Wind in HARRISON, MISSOURI
From 16-MAY-15 23:59:00 to 16-MAY-15 23:59:00 (CST-6)
Location: BLUE RIDGE
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Windows and siding damaged on a house. Nearby machine shed damaged with debris blown a quarter of a mile.

Tornado in RAY, MISSOURI
From 16-MAY-15 22:51:00 to 16-MAY-15 22:53:00 (CST-6)
Location: TAITSVILLE
Tornado F-scale: EF1
Reported by: NWS Storm Survey

The supercell that produced an EF-2 tornado near Sibley went on to produce a 2nd tornado near the city of Polo. It formed a few miles south of Polo in Ray County, producing some EF-1 damage to outbuildings in Ray County. The tornado then crossed into Caldwell County, and dissipated just east of Polo.

Tornado in CALDWELL, MISSOURI
From 16-MAY-15 22:53:00 to 16-MAY-15 22:57:00 (CST-6)
Location: POLO
Tornado F-scale: EF0
Reported by: NWS Storm Survey

This is a continuation of the tornado that formed in Ray County and moved into Caldwell County. A supercell that produced a tornado near Sibley formed a second tornado in northern Ray County, and did some EF-1 damage to some outbuildings before crossing into Caldwell County. The tornado dissipated just north of the county line about a couple miles east of Polo.

Flash Flood in CLAY, MISSOURI
From 16-MAY-15 20:08:00 to 17-MAY-15 02:08:00 (CST-6)
Location: GLENAIRE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Water reported to be up to an officer's patrol car at Liberty Drive and 291.

Flash Flood in CLINTON, MISSOURI
From 16-MAY-15 20:37:00 to 17-MAY-15 02:37:00 (CST-6)
Location: CONVERSE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Six inches of water was reported to be flowing over Highway 33 north of Highway PP.

Flash Flood in NODAWAY, MISSOURI
From 16-MAY-15 20:37:00 to 17-MAY-15 02:37:00 (CST-6)
Location: MARYVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Street flooding in the city of Maryville.

Flash Flood in NODAWAY, MISSOURI
From 16-MAY-15 19:54:00 to 17-MAY-15 01:54:00 (CST-6)
Location: QUITMAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water was reported over highway 113.

Thunderstorm Wind in HARRISON, MISSOURI
From 16-MAY-15 23:59:00 to 16-MAY-15 23:59:00 (CST-6)
Location: BLUE RIDGE
Magnitude: 56.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

A barn was destroyed and damage was reported to a grain elevator and silos.

Thunderstorm Wind in HARRISON, MISSOURI
From 17-MAY-15 00:06:00 to 17-MAY-15 00:06:00 (CST-6)
Location: BETHANY MEM ARPT
Magnitude: 56.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

A grain elevator was heavily damaged.

Flash Flood in ANDREW, MISSOURI
From 17-MAY-15 03:42:00 to 17-MAY-15 09:42:00 (CST-6)
Location: ROSENDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Highway 48 west of Rosendale was completely flooded.

Thunderstorm Wind in LAFAYETTE, MISSOURI
From 16-MAY-15 23:31:00 to 16-MAY-15 23:31:00 (CST-6)
Location: WELLINGTON
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Public

Large trees damaged and a barn destroyed.

Flash Flood in JACKSON, MISSOURI
From 17-MAY-15 00:17:00 to 17-MAY-15 06:17:00 (CST-6)
Location: KANSAS CITY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A water rescue was reported.

Hail in CLAY, MISSOURI
From 16-MAY-15 20:08:00 to 16-MAY-15 20:08:00 (CST-6)
Location: KEARNEY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in CASS, MISSOURI
From 16-MAY-15 20:17:00 to 16-MAY-15 20:17:00 (CST-6)
Location: RAYMORE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in JACKSON, MISSOURI
From 16-MAY-15 22:56:00 to 17-MAY-15 04:56:00 (CST-6)
Location: KANSAS CITY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Via social media, a picture showed water over the wheels of cars at the intersection of Westport and Pennsylvania roads in Kansas City.

Flash Flood in DE KALB, MISSOURI
From 16-MAY-15 23:21:00 to 17-MAY-15 05:21:00 (CST-6)
Location: OSBORN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Up to 6 inches of water was reported over several roads by the EM.

Flash Flood in CLAY, MISSOURI
From 16-MAY-15 23:22:00 to 17-MAY-15 05:22:00 (CST-6)
Location: LIBERTY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Water was half way up the doors of cars at William Jewell College in Liberty.

Flash Flood in JACKSON, MISSOURI
From 16-MAY-15 23:22:00 to 17-MAY-15 05:22:00 (CST-6)
Location: RED BRIDGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Roads are impassable at 103rd ST and Wornall RD in south Kansas City.

Flash Flood in DAVIESS, MISSOURI
From 17-MAY-15 00:12:00 to 17-MAY-15 06:12:00 (CST-6)
Location: COFFEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Highway B at 230th RD flooded.

Flash Flood in CLAY, MISSOURI
From 17-MAY-15 01:40:00 to 17-MAY-15 07:40:00 (CST-6)
Location: PRATHERSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Evacuations in Mosby were beginning due to rising waters.

Tornado in HENRY, MISSOURI
From 16-MAY-15 23:48:00 to 16-MAY-15 23:57:00 (CST-6)
Location: CLINTON
Tornado F-scale: EF0
Reported by: NWS Storm Survey

A QLCS moved eastward through western Missouri, and produced several mesovortices along the leading edge. One of these mesovortices formed just southwest of Clinton and did some minor damage to some residences and trees in the city. The damage path of the mesovortex came to an end just northeast of Clinton in rural Henry County.

Tornado in BATES, MISSOURI
From 16-MAY-15 23:05:00 to 16-MAY-15 23:09:00 (CST-6)
Location: ADRIAN
Tornado F-scale: EF1
Reported by: NWS Storm Survey

A QLCS moved through western Missouri, producing several mesovortices along the leading edge. One of these mesovortices struck a few residences and produced some tree damage near Adrian.

Tornado in RAY, MISSOURI
From 16-MAY-15 20:35:00 to 16-MAY-15 20:37:00 (CST-6)
Location: LAWSON
Tornado F-scale: EF0
Reported by: NWS Storm Survey

Ahead of the advancing QLCS that was responsible for widespread wind damage a supercell formed, which caused a very brief and weak tornado that did some minor damage to residences and trees in Lawson.

Tornado in JACKSON, MISSOURI
From 16-MAY-15 22:15:00 to 16-MAY-15 22:24:00 (CST-6)
Location: BUCKNER
Tornado F-scale: EF1
Reported by: NWS Storm Survey

Ahead of the advancing QLCS a supercell formed and produced a tornado in northern Jackson County. It formed just southwest of Sibley, Missouri and barely missed the main part of the city just to the west. Although it remained mostly in rural parts of Jackson County it did impact some outbuildings and did plenty of tree damage to areas just west of Sibley. The tornado then moved across the Missouri River, into Ray County where it dissipated northwest of Orrick.

Tornado in RAY, MISSOURI
From 16-MAY-15 22:24:00 to 16-MAY-15 22:32:00 (CST-6)
Location: ORRICK
Tornado F-scale: EF2
Reported by: NWS Storm Survey

This is a continuation of the tornado that formed in northern Jackson County and moved in Ray County. Ahead of the advancing QLCS a supercell formed in Jackson County a supercell formed and produced a tornado just southwest of Sibley. This tornado crossed the Missouri River into Ray County and produced EF-2 damage, mainly to rural areas of the county. It did impact a mobile home and ripped its support straps out of the ground and wrapped it around a nearby tree. No one was occupying the residence at the time, so no injuries were reported. The tornado dissipated in rural Ray County, just northwest of Orrick.

Thunderstorm Wind in PETTIS, MISSOURI
From 17-MAY-15 00:37:00 to 17-MAY-15 00:37:00 (CST-6)
Location: LAMONTE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The emergency manager relayed a report of winds up to 60 mph estimated on highway 50.

Thunderstorm Wind in DAVIESS, MISSOURI
From 17-MAY-15 00:20:00 to 17-MAY-15 00:20:00 (CST-6)
Location: GALLATIN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were blown down along Highway 6 near Highway CC, blocking the road.