Tornadoes and Flash Flood in Missouri, March 6, 2017

Sheriff deputy in Mound City reported power lines down.

Tractor trailer rig overturned on I-29 near Mound City from thunderstorm winds.

Sheriff reported downed trees between Forest City and Oregon.

There were a couple reports of a brief tornado west of Maryville. This tornado did not impact any structures of note.

A shed was blown into Road 220 near Ravenwood.

Several outbuildings were destroyed near Stanberry.

Report of a shed roof blown onto the road approximately 4 miles north of HWY 136 on Route N.

ASOS at Kansas City International Airport reported 58 knot winds (67 mph) for 8 minutes.

On the evening of March 6, a supercell ahead of a squall line produced a strong tornado that impacted the city of Smithville near Smithville Lake. The tornado formed just west of HWY 169 and did some minor damage to a neighborhood just east of HWY 169. More significant damage was done to a neighborhood along Route W, just east of HWY 169 before the tornado crossed Smithville Lake into Clinton County. At this neighborhood near the intersection of HWY 169 and Route W several houses were completely destroyed with roofs gone, but most external and interior walls still standing. There were also a couple residences that had compete failure of the structure as wind entered through garage doors and uplifted the entire house off the foundation. EF-2 rating was obtained mainly due to lack of structural failure of a majority of the residences. The house that was lifted off the foundation appeared to be a sliding house with winds entering in through a garage door. Surrounding residences had major damage, but not complete failure of structure. Despite the widespread damage from this tornado there were no injuries reported. This tornado crossed Route W and started across Smithville Lake, where it crossed into Clinton County.

Tractor trailer rig was blown over on I-35 near mile marker 93. 1 injury was reported with this incident.

An injury accident occurred on I-29 near Kansas City International Airport when a tractor trailer rig overturned due to high winds.

This tornado is a continuation of the tornado that moved out of Clay County after impacting Smithville and Smithville Lake on the night of March 6. The tornado reached its strongest rating and its widest size as it crossed out of Clay County into Clinton County while it crossed Smithville Lake. Like in Clay County several residences were impacted in Clinton County by this large tornado that reached 1000 yards wide at its largest point. The worst of the damage occurred just east of Smithville lake where numerous structures were completely destroyed, but like on the west side of the lake the worst of the damage seemed to occur where garage doors became a point of entry for 100+ mph winds and lifted the entire structure off of its foundation. The tornado continued across the rural portions of Clinton County, remaining at least EF-2 until it approached Lathrop, where it became smaller and didn't create as much damage. A few structures on the south end of Lathrop were damaged. The last damage point appeared to be just west of Interstate 35, where a few metal outbuildings had some metal peeled off, but no more damage was located east of I-35. The tornado dissipated between Lathrop and Interstate 35.

An estimated 60 mph wind gust occurred near Platte Woods.

Reports of power lines down at West and 11th Street.

Reports of power lines down at 70th and Montrose Avenue.

Estimated 60 mph winds with trailers being moved near the Smithville Hospital. Could be associated with rear flank downdraft from the nearby supercell producing the Smithville Tornado.

Front porch was blown off of home. Additional damage was done to two out buildings.

House damaged at HWY J and McComas Lane near Plattsburg.

Several outbuildings were damaged or destroyed across portions of Mercer County from a tornado embedded within a QLCS on the evening of March 6.

Power lines down on HWY 33 just south of Lathrop.

This report is all encompassing of numerous severe wind reports from across downtown Kansas City. Numerous trees were blown down and several buildings sustained more than cosmetic damage as a line of thunderstorms moved through the city. Several images of large structures with major damage to roofs and facades were seen on local news from across the metro. Winds near 70 mph were recorded at nearby Kansas City International Airport, but the damage around downtown Kansas City would suggest locally stronger wind gusts, perhaps approaching 80 mph. Despite the widespread damage there were no injuries reported with this activity in the immediate downtown portions of Kansas City.

AWOS station KGPH recorded a 59 knot (68 mph) wind gust as a line of thunderstorms moved through that area.

Half dollar sized hail was reported at 50th St and Stateline Road in Jackson County Missouri.

A narrow swath of wind, perhaps consistent with a mesovortex did some damage to portions of Grandview. Power lines were reported down across the city and several structures had some minor roof and siding damage. Straight line thunderstorm wind was determined to the be the cause due to the unidirectional layout of the debris field.

An Emergency Manager for Daviess County reported 70 mph wind near Jamesport.

An Emergency Manager for Grundy County reported a 60 mph wind gust just north of Trenton.

The same supercell that produced a weak and brief tornado near Leawood, Kansas and ultimately went on to produce the strong Oak Grove, Missouri tornado produced a weak and brief tornado in Lee's Summit. The damage was fairly isolated, and included a facade failure to a local business. Otherwise the damage was relegated to tree damage in Lee's Summit.

An Emergency Manager for Ray County reported 6 inch tree limbs down from strong thunderstorm winds near Lawson, Missouri.

A NWS employee reported a 18-20 inch tree blown over and numerous 6 to 10 inch tree limbs down on the roadways.

KLXT ASOS in Lee's Summit recorded a 56 knot (64 mph) wind gust with a line of storms that moved through that area.

While surveying the tornado that hit Oak Grove there was a neighborhood just south of the track of the tornadic circulation at Lake Lotawana. This damage was straight line winds, perhaps associated with a real-flank downdraft of the tornadic supercell that produced several tornadoes. The extent of the damage included some shingles off of roofs and some large tree limbs down.

On the evening of March 6 a supercell formed in eastern Kansas and moved ESE into the southern portions of the Kansas City metro area. It produced a weak tornado near Leawood, Kansas then another near Lee's Summit, Missouri. As the storm moved over Lake Lotawana it produced a third and more devastating tornado that went through the city of Oak Grove, Missouri, producing EF-3 damage. The most extensive damage was to some residences in Oak Grove that saw well built permanent foundation houses completely removed from the foundation and toppled over. There were 12 reported injuries in Oak Grove from this tornado. The tornado continued into Lafayette County and toward Odessa, Missouri.

A swath of wind around 80 to 90 mph affected areas in and around Richmond. A center point irrigation system was toppled over southwest of the city. Inside Richmond several trees were snapped as well as power poles. Several outbuildings were destroyed and several residences in the city sustained slightly more than cosmetic damage. The narrow and localized swath was consistent with a possible mesovortex, but the debris strewn generally unidirectional down stream from the source of the damage indicated straight line winds.

Trained spotter at the Lake City Ammo Plant reported golf ball sized hail.

Several outbuildings were damaged across portions of Caldwell County near Braymer.

This is a continuation of the EF-3 tornado that moved out of Jackson County and into Lafayette County. After the tornado devastated portions of Oak Grove, Missouri it traveled south of Bates City, doing mainly tree damage in rural Lafayette County. it then moved into Odessa, where it produced more EF-1 damage in the west part of Odessa. The bulk of the damage was to permanent residential structures across Odessa. The tornado weakened as it went east of Odessa, and finally dissipated just south of Interstate 70 east of Odessa.

Unionville dispatch relayed reports of 70 mph winds near Unionville.

Multiple barns and outbuildings were destroyed due to strong straight line winds across Ray County.

The public called in a report of 60 to 70 mph winds near Chillicothe.

A car port was blown into the roadway near Lexington.

The public reported several large trees down across Harrisonville.

Emergency management in Macon reported a 60 mph wind gust with a line of storms that moved through the area.

The embedded supercell that produced several tornadoes in eastern Kansas through Jackson County Missouri produced a brief tornado in Mayview where several structures were damaged, the most of which was some garage door and external wall damage to a residence in Mayview.

A squall line with embedded supercells and mesovortices moved through western Missouri and eastern Missouri on the evening of March 6. The storm took out a center point irrigation system just southwest of Carrolton; however, in the city of Carrolton several structures on the south side of the city were heavily damaged by tornadic winds. Along Main Street windows were completely blown out of several businesses and a couple buildings along Main Street even had some partial roof and external wall failure. The tornado moved east of town and did some external damage to a metal building. The tornado crossed HWY 65 and paralleled HWY 24 for a mile or two, causing damage to outbuildings along the route. About 2-3 miles east of Carrolton it crossed HWY 24 and dissipated north of HWY 24.

After a round of very heavy rain moved through the area there was some isolated flash flooding on the streets in and around Kansas City. One such instance was high water on northbound I-35 at Pennway Street, which closed part of the interstate for a brief period.

A half dozen barns were toppled over near Highway D near Passaic, Missouri.

Several trees and power lines were down near Garden City.

Debris from a barn was thrown across HWY N and Chandler Road near Garden City.

A tree fell on top of a mobile home with three people trapped inside. There were no known injuries from this event.

The public reported a large tree roughly 10-12 inches in diameter down due to strong winds.

Power poles snapped and 2x4's scattered across the road near Mendon.

A power outage was reported in Green Castle, Missouri as strong winds went through the area.

Several outbuildings and trees were damaged or destroyed as a tornado embedded within a QLCS did mainly damage to rural areas of Chariton County.

A NWS employee near Centerview, Missouri reported a 60 mph wind gust.

A trained spotter in Marceline reported a 60 mph wind gust.

A weak tornado formed just east of Whiteman AFB and produced damage to several structures in rural Johnson County before moving into Pettis County.

This is a continuation of the tornado that formed in Johnson County and moved into Pettis County. Several buildings were damaged across rural portions of Pettis County before the tornado dissipated just east of the Johnson/Pettis County lines.

Whiteman AFB (KSZL) reported 58 knot (67 mph) wind.

A RV was turned over at HWY T and Meneffee Road near Sedalia.

Several outbuildings were destroyed in the rural areas between Clinton and Tightwad, Missouri. NWS storm survey determined this damage was caused by a tornadic circulation within the squall line.

In areas near La Monte there were several outbuildings destroyed and RV was overtunred at HWY T and Menefee Road. Also several large tree limbs were reported down in the area.

Powerlines were down across the roadway near Green Ridge.

The ASOS at KIRK in Kirksville recorded a 60 mph wind gust.

Power lines were down across HWY 127 near Green Ridge.

An Emergency Manager in Macon, Missouri reported a 60 mph wind gust.

ASOS at KDMO recorded a 50 knot (58 mph) wind gust.

Several trees were down near Clifton City. The damage associated with this wind continues well into Cooper County, toward Booneville, but the wind further along this path is associated with a confirmed tornado.

Several trees were down near Clifton City. Also, a grain bin was moved by these strong straight line winds. Damage continued toward HWY 5 and Mile Corner Road, but this damage was associated with an embedded tornado within the squall line.

Several outbuildings and trees were damaged or destroyed in rural Cooper County.

Large tree limbs were down over State Route H.

A few broken residential windows with multiple mailboxes and road signs were blown over.