Strong to severe storms with heavy rainfall developed during the late morning of the 27th in association with an upper low pressure system. Widespread flash flooding and wind damage occurred over the region through the late afternoon. There were two brief tornadoes that developed along the leading edge of a quasi-linear convective system (QLCS) to the southwest and southeast of Bolivar. Numerous reports of heavy rainfall between 1 and 4 inches were received across southwestern Missouri. Rainfall accumulations over 5 inches occurred in Joplin and led to flash flooding in the city. Another round of flash flooding occurred along Kelly Creek in Monett and several roadways were closed.

Thunderstorm Wind in WEBSTER, MISSOURI
From 27-MAY-21 11:57:00 to 27-MAY-21 11:57:00 (CST-6)
Location: CROSS WAY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree limb was reported down.

Thunderstorm Wind in PHELPS, MISSOURI
From 27-MAY-21 12:19:00 to 27-MAY-21 12:19:00 (CST-6)
Location: ROLLA
Magnitude: 52.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: COOP Observer

High winds downed tree limbs damaging street lights and power lines causing power outages.

Thunderstorm Wind in WEBSTER, MISSOURI
From 26-MAY-21 23:49:00 to 26-MAY-21 23:49:00 (CST-6)
Location: NORTH VIEW HILL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A large tree was reported down.

Heavy Rain in BARRY, MISSOURI
From 27-MAY-21 07:00:00 to 28-MAY-21 07:20:00 (CST-6)
Location: WIGHTMAN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The Co Op Observer 4 miles southwest of Monett (UMNM7) reported a 24 hour rainfall of 4.34 inches.

Flash Flood in BARRY, MISSOURI
From 27-MAY-21 14:06:00 to 27-MAY-21 20:00:00 (CST-6)
Location: PIONEER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Highway 97 was closed at Shoal Creek due to flooding.

Flash Flood in BARRY, MISSOURI
From 27-MAY-21 15:27:00 to 27-MAY-21 20:00:00 (CST-6)
Location: MC DOWELL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Highway C at Flat Creek was closed due to flooding.

Flash Flood in BARRY, MISSOURI
From 27-MAY-21 19:51:00 to 28-MAY-21 02:00:00 (CST-6)
Location: MC DOWELL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Highway U at Flat Creek was closed due to flooding.

Flash Flood in BARRY, MISSOURI
From 27-MAY-21 19:30:00 to 28-MAY-21 02:00:00 (CST-6)
Location: EAGLE ROCK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Flooding occurred at Roaring River State Park twice during the evening. The river crested above flood stage and evacuations of the camp ground occurred.

Flash Flood in BARRY, MISSOURI
From 27-MAY-21 13:00:00 to 27-MAY-21 21:00:00 (CST-6)
Location: MONETT
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Significant flooding occurred along Kelly Creek as it rose out of its banks flooding numerous businesses and roads in town.

Flash Flood in DALLAS, MISSOURI
From 27-MAY-21 13:50:00 to 27-MAY-21 21:00:00 (CST-6)
Location: CEDAR RIDGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Route P north bound was closed due to flooding of a low water area.

Flash Flood in DOUGLAS, MISSOURI
From 27-MAY-21 14:30:00 to 27-MAY-21 21:00:00 (CST-6)
Location: OLATHE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Route U at Bryant Creek was closed due to flooding.

Flash Flood in DOUGLAS, MISSOURI
From 27-MAY-21 14:30:00 to 27-MAY-21 21:00:00 (CST-6)
Location: AVA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Route FF at Hunter Creek  was closed due to flooding.

Flash Flood in DOUGLAS, MISSOURI
From 27-MAY-21 14:30:00 to 27-MAY-21 21:00:00 (CST-6)
Location: AVA MUNI MEML ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway Y at Cowskin Creek was closed due to flooding.

Lightning in JASPER, MISSOURI
From 27-MAY-21 10:26:00 to 27-MAY-21 10:26:00 (CST-6)
Location: WEBB CITY
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Lightning struck a home causing minor electrical and structural damage.

Flood in DOUGLAS, MISSOURI
From 27-MAY-21 20:00:00 to 28-MAY-21 02:00:00 (CST-6)
Location: ANN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Highway EE at the North Fork River was closed due to flooding.

Flash Flood in JASPER, MISSOURI
From 27-MAY-21 10:47:00 to 27-MAY-21 18:00:00 (CST-6)
Location: DUQUESNE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple reports of city streets flooded and closed along with several stalled vehicles.

Flash Flood in JASPER, MISSOURI
From 27-MAY-21 16:20:00 to 27-MAY-21 23:00:00 (CST-6)
Location: DUQUESNE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 5.00K
Reported by: Emergency Manager

At least 11 roads were flooded and closed along with 8 water rescues/stalled vehicles were reported from heavy rainfall.

Flash Flood in JASPER, MISSOURI
From 27-MAY-21 14:00:00 to 27-MAY-21 22:00:00 (CST-6)
Location: JOPLIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple roads and a rail line were flooded.

Thunderstorm Wind in JASPER, MISSOURI
From 27-MAY-21 10:40:00 to 27-MAY-21 10:40:00 (CST-6)
Location: WEBB CITY
Magnitude: 52.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: State Official

Trees, power lines and poles were reported down along Rangeline and Enterprise Roads.

Thunderstorm Wind in DOUGLAS, MISSOURI
From 27-MAY-21 13:00:00 to 27-MAY-21 13:00:00 (CST-6)
Location: ARNO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree was reported down on County Road PP 524 blocking at lease one lane of traffic.

Flash Flood in JASPER, MISSOURI
From 27-MAY-21 10:31:00 to 27-MAY-21 18:00:00 (CST-6)
Location: DUQUESNE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several streets were flooded and impassable with at least one vehicle stalled in high water.

Flash Flood in WEBSTER, MISSOURI
From 27-MAY-21 13:15:00 to 27-MAY-21 20:00:00 (CST-6)
Location: NORTHVIEW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Water was reported over the road closing it to traffic.

Flash Flood in NEWTON, MISSOURI
From 27-MAY-21 13:32:00 to 27-MAY-21 20:00:00 (CST-6)
Location: NEOSHO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several city streets were reported flooded with at lease one vehicle stalled in high water.

Flash Flood in LAWRENCE, MISSOURI
From 27-MAY-21 13:47:00 to 27-MAY-21 20:00:00 (CST-6)
Location: PIERCE CITY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Highway 37 at Clear Creek was closed due to flooding.

Flash Flood in WEBSTER, MISSOURI
From 27-MAY-21 14:30:00 to 27-MAY-21 20:00:00 (CST-6)
Location: FORKNERS HILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Route Y at Hollis Branch was closed due to flooding.

Flash Flood in LAWRENCE, MISSOURI
From 27-MAY-21 15:56:00 to 27-MAY-21 20:00:00 (CST-6)
Location: PIERCE CITY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A water rescue was performed successfully on Clear Creek. No injuries were reported.

Flash Flood in TANEY, MISSOURI
From 27-MAY-21 18:34:00 to 28-MAY-21 00:00:00 (CST-6)
Location: PT LOOKOUT ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

High water was reported over several roads with flooding occurring along Turkey Creek. Between 3 and 4 inches of rain were recorded during the day.

Flash Flood in MCDONALD, MISSOURI
From 27-MAY-21 19:09:00 to 28-MAY-21 00:00:00 (CST-6)
Location: KLONDIKE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Highway 76 at Buffalo Creek was closed due to flooding. Water was reported to have risen very rapidly.

Flash Flood in MCDONALD, MISSOURI
From 27-MAY-21 18:00:00 to 28-MAY-21 00:00:00 (CST-6)
Location: MC NATT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Highway C was closed at Indian Creek due to flooding.

Flash Flood in NEWTON, MISSOURI
From 27-MAY-21 14:34:00 to 27-MAY-21 22:00:00 (CST-6)
Location: DESSA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Highway AA at a tributary of Buffalo Creek was closed at a low water crossing due to flooding.

Flash Flood in STONE, MISSOURI
From 27-MAY-21 14:40:00 to 27-MAY-21 22:00:00 (CST-6)
Location: ELSEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State highway 413 was closed due to flooding of a low water area.

Flash Flood in STONE, MISSOURI
From 27-MAY-21 16:05:00 to 27-MAY-21 22:00:00 (CST-6)
Location: PONCE DE LEON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State highway V at a tributary of the James River was closed due to flooding.

Flash Flood in STONE, MISSOURI
From 27-MAY-21 16:08:00 to 27-MAY-21 22:00:00 (CST-6)
Location: HURLEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State highway CC at Spring Creek was closed due to flooding.

Flash Flood in STONE, MISSOURI
From 27-MAY-21 16:07:00 to 28-MAY-21 00:00:00 (CST-6)
Location: HURLEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Highway A at Spring Creek in Hurley was closed due to flooding.

Hail in WEBSTER, MISSOURI
From 27-MAY-21 12:17:00 to 27-MAY-21 12:17:00 (CST-6)
Location: BRACKEN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Penny size hail was reported via MPing.

Thunderstorm Wind in CEDAR, MISSOURI
From 27-MAY-21 10:10:00 to 27-MAY-21 10:10:00 (CST-6)
Location: EL DORADO SPGS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees were reported down by high winds.

Flash Flood in OZARK, MISSOURI
From 27-MAY-21 18:10:00 to 28-MAY-21 00:00:00 (CST-6)
Location: ROCKBRIDGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Highway 95 at Bryant Creek was closed due to flooding.

Flood in NEWTON, MISSOURI
From 27-MAY-21 19:14:00 to 28-MAY-21 02:00:00 (CST-6)
Location: RITCHEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Highway W at Shoal Creek was closed due to flooding.

Flood in LAWRENCE, MISSOURI
From 27-MAY-21 19:54:00 to 28-MAY-21 02:00:00 (CST-6)
Location: AURORA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Highway K at Chat Creek was closed due to flooding.

Thunderstorm Wind in CEDAR, MISSOURI
From 27-MAY-21 10:38:00 to 27-MAY-21 10:38:00 (CST-6)
Location: BEARCREEK
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Several large tree limbs were downed by high winds.

Thunderstorm Wind in DALLAS, MISSOURI
From 27-MAY-21 11:27:00 to 27-MAY-21 11:27:00 (CST-6)
Location: CLOVERDALE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Numerous trees were damaged or downed by high winds south of Highway 32 along Cloverdale Road.

Thunderstorm Wind in LACLEDE, MISSOURI
From 27-MAY-21 11:49:00 to 27-MAY-21 11:49:00 (CST-6)
Location: PHILLIPSBURG
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Winds estimated between 70 and 80 mph with pea size hail and heavy rainfall was reported on Interstate 44 at Phillipsburg. Visibilities were reported at near zero.

Flood in LAWRENCE, MISSOURI
From 27-MAY-21 18:31:00 to 28-MAY-21 02:00:00 (CST-6)
Location: STOTTS CITY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Highway 97 at Spring Creek was closed due to flooding.

Flood in LACLEDE, MISSOURI
From 27-MAY-21 19:32:00 to 28-MAY-21 02:00:00 (CST-6)
Location: PEASE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Highway J at Parks Creek was closed due to flooding.

Flood in MCDONALD, MISSOURI
From 27-MAY-21 20:50:00 to 28-MAY-21 02:00:00 (CST-6)
Location: POWELL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Highway E at Big Sugar and Mikes Creeks was closed due to flooding.

Thunderstorm Wind in LACLEDE, MISSOURI
From 27-MAY-21 12:11:00 to 27-MAY-21 12:11:00 (CST-6)
Location: CONWAY
Magnitude: 52.00 EG
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Department of Highways

A tractor trailer was blown over on Interstate 44 west bound near exit 113 Route J and Y at mile marker 113.

Thunderstorm Wind in HOWELL, MISSOURI
From 27-MAY-21 14:06:00 to 27-MAY-21 14:06:00 (CST-6)
Location: CAULFIELD
Magnitude: 52.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Utility Company

Tree limbs were reported down on powerlines in the Caulfield and Potterville areas.

Thunderstorm Wind in HOWELL, MISSOURI
From 27-MAY-21 14:19:00 to 27-MAY-21 14:19:00 (CST-6)
Location: WEST PLAINS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree was reported down.

Flood in JASPER, MISSOURI
From 28-MAY-21 01:55:00 to 28-MAY-21 08:00:00 (CST-6)
Location: LAKESIDE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

State Route D at Center Creek was closed due to flooding.

Tornado in POLK, MISSOURI
From 27-MAY-21 10:51:00 to 27-MAY-21 10:52:00 (CST-6)
Location: BOLIVAR MEM ARPT
Tornado F-scale: EF1
Property damage: 300.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service survey determined that an EF1 tornado briefly touched down destroying a workshop building and causing significant damage to another. Several trees were uprooted and multiple travel trailers suffered minor damage. The tornado was very short lived but witnessed by multiple people. Maximum wind speeds with the tornado were estimated at 95 mph and a width of 50 yards.

Tornado in POLK, MISSOURI
From 27-MAY-21 11:08:00 to 27-MAY-21 11:09:00 (CST-6)
Location: VAN
Tornado F-scale: EF1
Property damage: 75.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service survey determined that an EF1 tornado touched down and traveled 1.2 miles with maximum estimated windspeeds of 95 mph. Along the path of the tornado a large hay barn was heavily damaged and multiple trees were uprooted. The width of the tornado was near 50 yards wide.

Thunderstorm Wind in WEBSTER, MISSOURI
From 27-MAY-21 12:12:00 to 27-MAY-21 12:12:00 (CST-6)
Location: MARSHFIELD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A large tree was reported down on Highway CC blocking one lane of traffic.

Thunderstorm Wind in MARIES, MISSOURI
From 27-MAY-21 12:02:00 to 27-MAY-21 12:02:00 (CST-6)
Location: (VIH)ROLLA/VICHY ARP
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS at the Vichy/Rolla Airport measured a 66 MPH gust from the northwest.

Thunderstorm Wind in WEBSTER, MISSOURI
From 27-MAY-21 12:00:00 to 27-MAY-21 12:00:00 (CST-6)
Location: MARSHFIELD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A large tree was reported down.

Thunderstorm Wind in POLK, MISSOURI
From 27-MAY-21 10:47:00 to 27-MAY-21 10:47:00 (CST-6)
Location: FAIR PLAY
Magnitude: 52.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees and power lines were reported down.

Thunderstorm Wind in POLK, MISSOURI
From 27-MAY-21 10:55:00 to 27-MAY-21 10:55:00 (CST-6)
Location: BOLIVAR MEM ARPT
Magnitude: 52.00 EG
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Multiple power lines and trees were reported down. Some of the power lines fell across Highway 13 blocking traffic. An outbuilding suffered significant damage.

Thunderstorm Wind in POLK, MISSOURI
From 27-MAY-21 16:04:00 to 27-MAY-21 16:04:00 (CST-6)
Location: BURNS
Magnitude: 52.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Public

Power lines and poles were reported down along with large tree limbs at least three inches in diameter.

Thunderstorm Wind in WEBSTER, MISSOURI
From 27-MAY-21 10:49:00 to 27-MAY-21 10:49:00 (CST-6)
Location: NORTH VIEW HILL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A large tree was reported down.

Thunderstorm Wind in POLK, MISSOURI
From 27-MAY-21 11:15:00 to 27-MAY-21 11:15:00 (CST-6)
Location: BURNS
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The AWOS station KM17 in Bolivar recorded a 52 knot wind gust.

Thunderstorm Wind in PHELPS, MISSOURI
From 27-MAY-21 12:05:00 to 27-MAY-21 12:05:00 (CST-6)
Location: ROLLA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple large limbs and several trees were reported down near the Phelps County Regional Center and 10th Street.

Thunderstorm Wind in POLK, MISSOURI
From 27-MAY-21 11:00:00 to 27-MAY-21 11:00:00 (CST-6)
Location: SLAGLE
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A parked semi trailer was blown onto its side by high winds.

Thunderstorm Wind in POLK, MISSOURI
From 27-MAY-21 11:08:00 to 27-MAY-21 11:08:00 (CST-6)
Location: VAN
Magnitude: 52.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Public

Multiple trees were reported down or with large limbs down. A few outbuildings suffered minor to moderate damage from high winds.

Thunderstorm Wind in POLK, MISSOURI
From 27-MAY-21 10:51:00 to 27-MAY-21 10:51:00 (CST-6)
Location: BOLIVAR MEM ARPT
Magnitude: 52.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Newspaper

Multiple power poles were snapped and lines were down along Highway 32 west of Highway 13.