The heat was tempered on the 11th as storms returned to the region. The fireworks began in northwest sections of the state, and gradually spread to the south and east. By 200 pm CST, temperatures had cooled into the upper 60s to mid 70s in the north/west. It was only 69 degrees at Harrison (Boone County). At Jasper (Newton County), 4.70 inches of rain flooded an apartment building.
Later that night/early on the 12th, it got serious. A large cluster of thunderstorms blew up in west central and southwest sections of the state, and turned into a bonafide gullywasher. There was over ten inches of precipitation in places.
By the time the event was over, Mena (Polk County) had 11.47 inches of rain, a record for August one day rainfall. Much of this happened from 1200 am CST to 1200 pm CST on the 12th. Interestingly, a little more than a year ago (July 15-16, 2019), a state record for twenty four hour rainfall (16.17 inches) was set at Dierks (Howard County) due to the remnants of Tropical Storm Barry.
Amounts exceeded seven inches at Big Fork (Polk County), and were between four and five inches at Camden (Ouachita County) and Fordyce (Dallas County).
Flooding was extensive at Mena (Polk County), with numerous roads under water. This included portions of Highways 88 and 375. Water got into some homes and businesses, and several high water rescues were necessary.
It was a repeat performance early on the 14th. The west got hit again. There were two to three inch totals at Booneville (Logan County), Parks (Scott County), Waldron (Scott County), and Blakely Mountain Dam (Garland County). Trees were uprooted just south of Booneville (Logan County), six miles west of Union Hill (Scott County) along Highway 80, and a few miles southwest of Story (Montgomery County). Central Avenue flooded in Hot Springs (Garland County), and trees were toppled in town.

Flash Flood in NEWTON, ARKANSAS
From 11-AUG-20 13:04:00 to 11-AUG-20 16:04:00 (CST-6)
Location: JASPER
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The first floor of Valley View Apartments on Mountain Street in Jasper was reported as flooded. Heavy rain continued to fall.

Thunderstorm Wind in SALINE, ARKANSAS
From 11-AUG-20 15:16:00 to 11-AUG-20 18:16:00 (CST-6)
Location: BENTON
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A power pole was blown over onto parked cars on Military Road in Benton.

Thunderstorm Wind in SALINE, ARKANSAS
From 11-AUG-20 15:27:00 to 11-AUG-20 15:27:00 (CST-6)
Location: BENTON SALINE CO ARP
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A large tree was blown down on Peeler Bend Rd., blocking the roadway. Several power lines were down also.

Heavy Rain in FAULKNER, ARKANSAS
From 11-AUG-20 15:40:00 to 11-AUG-20 15:40:00 (CST-6)
Location: VILONIA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

This was measured in about an hour and a half.

Flash Flood in OUACHITA, ARKANSAS
From 12-AUG-20 07:30:00 to 12-AUG-20 10:30:00 (CST-6)
Location: CAMDEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A video on social media shows water from heavy rain flowing across front yards in Camden.

Flash Flood in POLK, ARKANSAS
From 12-AUG-20 08:22:00 to 12-AUG-20 11:22:00 (CST-6)
Location: MENA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Water was over portions of Highway 88 and 375.

Flash Flood in POLK, ARKANSAS
From 12-AUG-20 09:27:00 to 12-AUG-20 12:27:00 (CST-6)
Location: MENA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

There was a water rescue near Polk Rd. 54, ditches were flooded, and water was flowing over roads.

Thunderstorm Wind in LOGAN, ARKANSAS
From 14-AUG-20 03:30:00 to 14-AUG-20 03:30:00 (CST-6)
Location: BOONEVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A few trees were blown down near Hwy. 23, south of Booneville.

Thunderstorm Wind in SCOTT, ARKANSAS
From 14-AUG-20 03:40:00 to 14-AUG-20 03:40:00 (CST-6)
Location: CARDIFF
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down along Highway 80 East.

Thunderstorm Wind in MONTGOMERY, ARKANSAS
From 14-AUG-20 04:20:00 to 14-AUG-20 04:20:00 (CST-6)
Location: WASHITA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were down along Highway 88.

Thunderstorm Wind in GARLAND, ARKANSAS
From 14-AUG-20 05:00:00 to 14-AUG-20 05:00:00 (CST-6)
Location: HOT SPGS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were down at Malvern Rd. and Shawnee St.

Flash Flood in GARLAND, ARKANSAS
From 14-AUG-20 05:17:00 to 14-AUG-20 08:17:00 (CST-6)
Location: HOT SPGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roads were flooded and blocked off at Central Ave. and Franklin St.