Strong to severe thunderstorms developed during the afternoon and evening of the 10th as an upper level disturbance and outflow boundary from an intense derecho over Iowa interacted with a stalled front. The strongest storms produced hail up to 2.5 inches in diameter. Strong straight line winds produced damage across the region. During the early morning hours of the 11th, another upper level disturbance generated additional storms mainly over areas along and south of Interstate 44.

Thunderstorm Wind in TEXAS, MISSOURI
From 09-AUG-20 15:40:00 to 09-AUG-20 15:40:00 (CST-6)
Location: HOUSTON
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous trees were damaged or downed in the city of Houston. A tree fell through a garage causing severe damage with several other outbuildings also suffering tree damage across town. Winds were estimated at 70mph.

Hail in VERNON, MISSOURI
From 10-AUG-20 16:12:00 to 10-AUG-20 16:12:00 (CST-6)
Location: BRISTOW
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter sized hail was reported.

Hail in VERNON, MISSOURI
From 10-AUG-20 16:30:00 to 10-AUG-20 16:30:00 (CST-6)
Location: WALKER
Magnitude: 2.50 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Public

Hail between 2 and 2.5 inches was reported via social media. Minor vehicle and roof damage was also reported.

Hail in DENT, MISSOURI
From 10-AUG-20 17:00:00 to 10-AUG-20 17:00:00 (CST-6)
Location: SALEM
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Penny size hail was reported.

Hail in PHELPS, MISSOURI
From 10-AUG-20 17:04:00 to 10-AUG-20 17:04:00 (CST-6)
Location: DILLON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter sized hail and strong winds were reported.

Hail in VERNON, MISSOURI
From 10-AUG-20 17:40:00 to 10-AUG-20 17:40:00 (CST-6)
Location: DEDERICK
Magnitude: 2.50 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Tennis ball sized hail was reported in a rural area of the county. A vehicle suffered hail damage.

Hail in DENT, MISSOURI
From 10-AUG-20 17:05:00 to 10-AUG-20 17:05:00 (CST-6)
Location: SALEM
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Half dollar sized hail was reported.

Hail in ST. CLAIR, MISSOURI
From 10-AUG-20 17:07:00 to 10-AUG-20 17:07:00 (CST-6)
Location: PAPE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail to the size of ping pong balls was reported.

Hail in CEDAR, MISSOURI
From 11-AUG-20 15:30:00 to 11-AUG-20 15:30:00 (CST-6)
Location: FILLEY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Penny sized hail was reported.

Heavy Rain in LACLEDE, MISSOURI
From 10-AUG-20 09:30:00 to 11-AUG-20 09:30:00 (CST-6)
Location: OAKLAND
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A 24 hour public report of 7.00 inches or rain occurred.

Thunderstorm Wind in NEWTON, MISSOURI
From 10-AUG-20 16:38:00 to 10-AUG-20 16:38:00 (CST-6)
Location: SENECA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Numerous large branches were reported down.

Thunderstorm Wind in NEWTON, MISSOURI
From 10-AUG-20 16:46:00 to 10-AUG-20 16:46:00 (CST-6)
Location: NEOSHO
Magnitude: 52.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Power lines were reported down causing several power outages.

Thunderstorm Wind in HICKORY, MISSOURI
From 10-AUG-20 17:57:00 to 10-AUG-20 17:57:00 (CST-6)
Location: WHEATLAND
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Multiple trees were reported down.

Thunderstorm Wind in HICKORY, MISSOURI
From 10-AUG-20 17:58:00 to 10-AUG-20 17:58:00 (CST-6)
Location: ELKTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees were reported down.

Thunderstorm Wind in HICKORY, MISSOURI
From 10-AUG-20 18:11:00 to 10-AUG-20 18:11:00 (CST-6)
Location: PITTSBURG
Magnitude: 52.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Amateur Radio

Several large trees were reported down and a flag pole was snapped at the base.

Thunderstorm Wind in DALLAS, MISSOURI
From 10-AUG-20 18:30:00 to 10-AUG-20 18:30:00 (CST-6)
Location: BUFFALO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple trees were snapped or uprooted.

Thunderstorm Wind in TEXAS, MISSOURI
From 09-AUG-20 15:50:00 to 09-AUG-20 15:50:00 (CST-6)
Location: HOUSTON
Magnitude: 56.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The Emergency Manager reported power outages from trees and large limbs down on power lines. Winds were estimated at 60-70 mph.

Thunderstorm Wind in CEDAR, MISSOURI
From 10-AUG-20 17:28:00 to 10-AUG-20 17:28:00 (CST-6)
Location: EL DORADO SPGS
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Mesonet station WKTM7 at the Wah Kon Tah Raws site reported a 53 knot gust.

Flash Flood in DENT, MISSOURI
From 10-AUG-20 17:34:00 to 10-AUG-20 23:15:00 (CST-6)
Location: SALEM
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous city streets were reported flooded and impassable.

Flash Flood in DENT, MISSOURI
From 10-AUG-20 18:45:00 to 10-AUG-20 23:15:00 (CST-6)
Location: SALEM
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Spring Creek flooded a section of Iron Mountain Road from heavy rain that fell in a two hour period.