A moist and unstable air mass interacted with several upper level disturbances and a very slow moving upper level low pressure system to bring heavy rain to the region. The storms occurring on the afternoon of the 14th produced hail larger than golf balls and damaging straight-line winds from Springfield eastward into West Plains. With grounds already saturated from the rainfall on the 11th and 12th,  widespread stream flooding and flash flooding developed, mainly on the 16th and 17, after rainfall accumulations exceeded three inches across much of the region.

Thunderstorm Wind in DOUGLAS, MISSOURI
From 14-MAY-20 16:55:00 to 14-MAY-20 16:55:00 (CST-6)
Location: AVA
Magnitude: 52.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Public

Several large tree limbs were reported down on power lines.

Thunderstorm Wind in VERNON, MISSOURI
From 15-MAY-20 00:40:00 to 15-MAY-20 00:40:00 (CST-6)
Location: MOUNDVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A large tree was blown down along Highway 43 near Tyree Road.

Flood in OZARK, MISSOURI
From 15-MAY-20 13:17:00 to 15-MAY-20 15:00:00 (CST-6)
Location: MAMMOTH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway T was closed due to flooding at the Possum Walk Creek low water crossing.

Hail in WEBSTER, MISSOURI
From 14-MAY-20 16:07:00 to 14-MAY-20 16:07:00 (CST-6)
Location: SEYMOUR
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail was reported.

Heavy Rain in TEXAS, MISSOURI
From 14-MAY-20 06:00:00 to 15-MAY-20 05:30:00 (CST-6)
Location: PINE CREST
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Rainfall totals over a 24 hour period were measured at 5.50 inches in the town of Summersville and 4.02 at a CoCoRAHS site 3 miles south of town.

Heavy Rain in DOUGLAS, MISSOURI
From 14-MAY-20 17:00:00 to 14-MAY-20 17:18:00 (CST-6)
Location: AVA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported 1.30 inches of rainfall in 15 minutes.

Heavy Rain in WRIGHT, MISSOURI
From 14-MAY-20 19:00:00 to 14-MAY-20 19:30:00 (CST-6)
Location: MOUNTAIN GROVE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain up to 1.26 inches over a 30 minute period caused some minor street flooding.

Heavy Rain in SHANNON, MISSOURI
From 14-MAY-20 05:00:00 to 15-MAY-20 05:15:00 (CST-6)
Location: ROUND SPG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The Co-op Observer measured 2.51 inches of rain over the past 24 hours.

Heavy Rain in SHANNON, MISSOURI
From 14-MAY-20 06:00:00 to 15-MAY-20 05:53:00 (CST-6)
Location: BLUE SPGS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The Co-op Observer measured 4.63 inches of rain over the past 24 hours.

Heavy Rain in GREENE, MISSOURI
From 14-MAY-20 06:00:00 to 15-MAY-20 06:00:00 (CST-6)
Location: MULROY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Rainfall over the past 24 hours measuring 2.10 inches was reported.

Heavy Rain in POLK, MISSOURI
From 14-MAY-20 06:00:00 to 15-MAY-20 06:45:00 (CST-6)
Location: PLEASANT HOPE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Rainfall over the past 24 hours measuring 2.24 inches was reported.

Flash Flood in DOUGLAS, MISSOURI
From 14-MAY-20 19:20:00 to 14-MAY-20 21:26:00 (CST-6)
Location: AVA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Highway FF at Hunter Creek was impassable due to flooding.

Flash Flood in DOUGLAS, MISSOURI
From 14-MAY-20 19:20:00 to 14-MAY-20 21:26:00 (CST-6)
Location: AVA MUNI MEML ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Highway Y at Cowskin Creek was impassable with 2 feet of water flowing over the roadway.

Flash Flood in DOUGLAS, MISSOURI
From 14-MAY-20 20:52:00 to 14-MAY-20 21:26:00 (CST-6)
Location: OLATHE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway U was closed due to flooding at the Bryant Creek low water crossing.

Flash Flood in WEBSTER, MISSOURI
From 14-MAY-20 21:04:00 to 14-MAY-20 21:26:00 (CST-6)
Location: OLGA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway Z at the Finley Creek low waster crossing was closed due to flooding.

Flash Flood in SHANNON, MISSOURI
From 15-MAY-20 01:00:00 to 15-MAY-20 03:00:00 (CST-6)
Location: ANGELINE
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

A vehicle was washed of the road. The occupants self rescued with no injuries.

Flash Flood in CHRISTIAN, MISSOURI
From 16-MAY-20 08:40:00 to 16-MAY-20 12:45:00 (CST-6)
Location: KELTNER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Multiple locations on Highway T between Oldfield and Keltner along Swan Creek were flooded and impassable.

Flash Flood in CHRISTIAN, MISSOURI
From 16-MAY-20 09:15:00 to 16-MAY-20 12:45:00 (CST-6)
Location: GARRISON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The Bar K Ranch Campground was evacuated due to flooding. Several camps had to be moved to avoid being impacted by the rapidly rising waters.

Flash Flood in CHRISTIAN, MISSOURI
From 16-MAY-20 09:38:00 to 16-MAY-20 12:45:00 (CST-6)
Location: SPARTA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several locations along Highway 125 east of Sparta were flooded and impassable including location that do not normally flood.

Flash Flood in CHRISTIAN, MISSOURI
From 16-MAY-20 10:15:00 to 16-MAY-20 12:45:00 (CST-6)
Location: SPARTA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway 14 was closed due to flooding at a low water area.

Flash Flood in CHRISTIAN, MISSOURI
From 16-MAY-20 12:00:00 to 16-MAY-20 12:45:00 (CST-6)
Location: ELKHEAD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

State Highway Z was flooded and closed just north of Highway 14 due to flooding.

Flash Flood in WEBSTER, MISSOURI
From 16-MAY-20 10:28:00 to 16-MAY-20 15:45:00 (CST-6)
Location: CROWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Highway A near the James River was flooded and impassable.

Flash Flood in WEBSTER, MISSOURI
From 16-MAY-20 12:30:00 to 16-MAY-20 15:45:00 (CST-6)
Location: OLGA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Highway Z was closed due to flooding at the Finley Creek low water crossing.

Flash Flood in WEBSTER, MISSOURI
From 16-MAY-20 12:45:00 to 16-MAY-20 15:45:00 (CST-6)
Location: FORDLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway FF was closed due to flooding at the Panther Creek low water crossing.

Flash Flood in CHRISTIAN, MISSOURI
From 16-MAY-20 12:46:00 to 16-MAY-20 17:16:00 (CST-6)
Location: ABADYL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway U was closed due to flooding at the Pedelo Creek low water crossing.

Flood in WRIGHT, MISSOURI
From 14-MAY-20 21:01:00 to 15-MAY-20 00:00:00 (CST-6)
Location: OWENS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway N was closed due to flooding at the Whetstone Creek Low water Crossing.

Flood in GREENE, MISSOURI
From 15-MAY-20 04:32:00 to 15-MAY-20 10:00:00 (CST-6)
Location: FAIR GROVE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway CC was closed due to flooding at the Little Pomme De Terre River low water crossing.

Flood in WEBSTER, MISSOURI
From 15-MAY-20 05:45:00 to 15-MAY-20 10:00:00 (CST-6)
Location: DIGGINS
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A water rescue was performed on the James River where it runs along Pleasant Hill Road. The rescue was successful and no injuries were reported. The vehicle was washed down river.

Flood in OZARK, MISSOURI
From 15-MAY-20 07:11:00 to 15-MAY-20 10:00:00 (CST-6)
Location: SYCAMORE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway 181 was closed due to flooding at the Bryant Creek low water crossing.

Flood in OZARK, MISSOURI
From 15-MAY-20 07:11:00 to 15-MAY-20 10:00:00 (CST-6)
Location: ROCKBRIDGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway 95 was closed due to flooding at the Bryant Creek low water crossing.

Flood in WEBSTER, MISSOURI
From 15-MAY-20 08:15:00 to 15-MAY-20 10:00:00 (CST-6)
Location: NORTHVIEW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Greenwood Road had at least 6 inches of flowing water over the road at the Pomme De Terre River low water crossing.

Flood in GREENE, MISSOURI
From 15-MAY-20 08:26:00 to 15-MAY-20 10:00:00 (CST-6)
Location: PALMETTO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The intersection of Farm Roads 170 and 243 were closed due to flooding with two feet of flowing water.

Flood in WRIGHT, MISSOURI
From 15-MAY-20 09:34:00 to 15-MAY-20 15:00:00 (CST-6)
Location: RAYBORN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway E was closed due to flooding at the Gasconade River low water crossing.

Flood in WRIGHT, MISSOURI
From 15-MAY-20 09:37:00 to 15-MAY-20 15:00:00 (CST-6)
Location: MANSFIELD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway AB was closed due to flooding at the Wolf Creek low water crossing.

Flood in CHRISTIAN, MISSOURI
From 15-MAY-20 10:14:00 to 15-MAY-20 15:00:00 (CST-6)
Location: RIVERDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Water from the Finely River flowing out of its banks closed Riverdale Road east of the Finley River low water bridge.

Flood in SHANNON, MISSOURI
From 15-MAY-20 10:56:00 to 15-MAY-20 15:00:00 (CST-6)
Location: BANKER CAVE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway HH was closed due to flooding at the Carr Creek low water Crossing.

Flood in GREENE, MISSOURI
From 15-MAY-20 08:40:00 to 15-MAY-20 10:00:00 (CST-6)
Location: SEQUIOTA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

The Crighton Access on Farm Road 193 at the James River was closed due to flooding.

Flash Flood in SHANNON, MISSOURI
From 14-MAY-20 23:30:00 to 15-MAY-20 03:45:00 (CST-6)
Location: ROUND SPG
Flood cause: Heavy Rain
Property damage: 2.50K
Crop damage: 0.00K
Reported by: COOP Observer

Around 35 head of cattle were swept down stream as waters rapidly rose in the river valley. Many of the cattle were recovered but at least 2 were found dead down river.

Flash Flood in WEBSTER, MISSOURI
From 16-MAY-20 12:48:00 to 16-MAY-20 15:45:00 (CST-6)
Location: COMPTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway B was closed at the Panther Creek low water crossing due to flooding.