Thunderstorms developed over central Oklahoma during the early evening of the 20th, along and just ahead of a cold front moving into the area. The atmosphere ahead of the front was very unstable. Wind fields across the region strengthened with the approach of a strong upper level storm system, and very strong wind shear developed over northwestern Arkansas by late evening. The thunderstorms moved across eastern Oklahoma during the evening, and organized into a solid line of thunderstorms before they moved into northwest Arkansas. The thunderstorms produced very strong downburst wind as they moved through the region. Several tornadoes developed along the leading edge of the thunderstorm line, one of which was long-track and strong.

Thunderstorm Wind in WASHINGTON, ARKANSAS
From 20-OCT-19 23:23:00 to 20-OCT-19 23:23:00 (CST-6)
Location: PRAIRIE GROVE
Magnitude: 70.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong thunderstorm wind blew down trees and power lines.

Thunderstorm Wind in BENTON, ARKANSAS
From 20-OCT-19 23:36:00 to 20-OCT-19 23:36:00 (CST-6)
Location: MONTE NE
Magnitude: 75.00 EG
Property damage: 75.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Strong thunderstorm wind uprooted trees, one of which fell through a home. A man was killed by the fallen tree.

Thunderstorm Wind in BENTON, ARKANSAS
From 20-OCT-19 23:08:00 to 20-OCT-19 23:08:00 (CST-6)
Location: SILOAM SPGS
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong thunderstorm wind blew down trees on Holly Street, south of Central Street.

Thunderstorm Wind in WASHINGTON, ARKANSAS
From 20-OCT-19 23:32:00 to 20-OCT-19 23:32:00 (CST-6)
Location: SPRINGDALE MUNI ARPT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong thunderstorm wind snapped large tree limbs near the Springdale Municipal Airport.

Thunderstorm Wind in CARROLL, ARKANSAS
From 20-OCT-19 23:50:00 to 20-OCT-19 23:50:00 (CST-6)
Location: EUREKA SPGS
Magnitude: 65.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind uprooted trees and damaged outbuildings.

Thunderstorm Wind in CARROLL, ARKANSAS
From 20-OCT-19 23:55:00 to 20-OCT-19 23:55:00 (CST-6)
Location: ELK RANCH
Magnitude: 65.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind uprooted numerous trees, damaged homes, damaged outbuildings, and blew down power lines in and around the Rock Springs Community.

Thunderstorm Wind in CARROLL, ARKANSAS
From 21-OCT-19 00:07:00 to 21-OCT-19 00:07:00 (CST-6)
Location: OAK GROVE
Magnitude: 65.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind uprooted trees and damaged homes.

Hail in BENTON, ARKANSAS
From 20-OCT-19 23:15:00 to 20-OCT-19 23:15:00 (CST-6)
Location: SILOAM SPGS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in BENTON, ARKANSAS
From 20-OCT-19 23:06:00 to 20-OCT-19 23:09:00 (CST-6)
Location: LAKE FRANCES
Tornado F-scale: EF1
Property damage: 150.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This is the second segment of a two-segment tornado. In Benton County, this tornado moved across the southern portion of Siloam Springs, uprooting numerous trees, damaging homes and businesses, destroying outbuildings, and snapping power poles. Based on this damage, maximum estimated wind in this segment of the tornado was 90 to 100 mph.

Tornado in BENTON, ARKANSAS
From 20-OCT-19 23:08:00 to 20-OCT-19 23:38:00 (CST-6)
Location: SILOAM SPGS
Tornado F-scale: EF2
Property damage: 6.00M
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado developed on the north side of Siloam Springs. It moved along Highway 412, and then across the southern portion of the Siloam Springs airport, as well as a housing subdivision east of the airport. The roof was blown off a business, many homes and businesses sustained roof damage, several hangars at the airport were damaged, numerous trees were uprooted, and power poles were snapped. The tornado became very large and moved east-northeast from the east side of Siloam Springs. The roof of a wood-framed permanent home was entirely removed, and a large, well-built, wood-framed outbuilding was destroyed on Andria Circle, which are the primary damage indicators that resulted in the EF-2 rating. These structures were on a hill, and nearby hardwood trees were snapped, homes were damaged with windows blown out and roof structures lifted off the frame of the house and set back down. The tornado continued to move east-northeast across Highfill and Cave Springs, and into Rogers. Numerous homes were damaged, outbuildings were destroyed, many power poles were blown down, and numerous trees were uprooted. A metal building structure that was open-aired on the south side sustained severe damage. Businesses in the Pinnacle Hills area of Rogers were damaged. From Rogers, the tornado moved northeast, crossing inlets of Beaver Lake before dissipating. Based on this damage, maximum estimated wind in the tornado was 110 to 120 mph.

Thunderstorm Wind in BENTON, ARKANSAS
From 20-OCT-19 23:13:00 to 20-OCT-19 23:13:00 (CST-6)
Location: GALLITIN
Magnitude: 75.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Strong thunderstorm wind uprooted trees.

Thunderstorm Wind in BENTON, ARKANSAS
From 20-OCT-19 23:32:00 to 20-OCT-19 23:32:00 (CST-6)
Location: MONTE NE
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Strong thunderstorm wind uprooted trees.

Thunderstorm Wind in BENTON, ARKANSAS
From 20-OCT-19 23:34:00 to 20-OCT-19 23:34:00 (CST-6)
Location: MONTE NE
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Strong thunderstorm wind uprooted trees.