The heaviest cloudbursts on the 4th were in Clark and Hot Spring Counties close to Interstate 30. Some flash flooding occurred, with high water near the Amtrak depot in Gurdon, and roads under water in Arkadelphia (both in Clark County). Radar estimated over a half foot of rain between Gurdon and Okolona (both in Clark County). A rain gauge at the latter location showed roughly five inches (via social media). Four to five inches of rain dumped in Arkadelphia (Clark County), with about an inch at Hot Springs (Garland County). It was the first time since mid-August that both sites received at least a half inch of precipitation in a day.
The floodgates opened even more in the following days. A ridge of high pressure that persisted over Arkansas in September with dry/hot conditions finally broke down. That led to more cold fronts, chances of rain, and shots of cooler air.
One such front was on the doorstep to the northwest to begin the 6th. Ahead of the front, showers and thunderstorms were ongoing in northwest sections of the state.
Heavy to excessive rain continued through much of the morning in areas toward the Missouri border. This kept temperatures in the 60s at Harrison (Boone County), and Mountain Home (Baxter County). Meanwhile, well ahead of the front where it was not raining, readings were in the 90s across the southern counties.
In the afternoon and evening, storms eventually worked to the south and east across the region. Along the way, there were several reports of severe weather. Golf ball size occurred near Atkins (Pope County), with quarter to half dollar size hail at Russellville (Pope County), Olmstead (Pulaski County), and around Hazen (Prairie County). A few miles east of Atkins (Pope County), a tree was blown onto the eastbound lanes of Interstate 40. A 56 mph gust was measured at the Stuttgart Airport in Fairmount (Prairie County).

Flash Flood in CLARK, ARKANSAS
From 04-OCT-19 15:00:00 to 04-OCT-19 18:00:00 (CST-6)
Location: GURDON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flash flooding was reported near the Amtrak Depot.

Flash Flood in CLARK, ARKANSAS
From 04-OCT-19 15:05:00 to 04-OCT-19 18:05:00 (CST-6)
Location: ARKADELPHIA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous roads were under water in town.

Hail in POPE, ARKANSAS
From 06-OCT-19 18:04:00 to 06-OCT-19 18:04:00 (CST-6)
Location: OAKLAND HGTS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Hail in POPE, ARKANSAS
From 06-OCT-19 18:26:00 to 06-OCT-19 18:26:00 (CST-6)
Location: ATKINS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Hail in PRAIRIE, ARKANSAS
From 06-OCT-19 19:38:00 to 06-OCT-19 19:38:00 (CST-6)
Location: CENTER PT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Hail in PULASKI, ARKANSAS
From 06-OCT-19 19:48:00 to 06-OCT-19 19:48:00 (CST-6)
Location: OLMSTEAD
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in PULASKI, ARKANSAS
From 06-OCT-19 19:48:00 to 06-OCT-19 19:48:00 (CST-6)
Location: OLMSTEAD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

An estimated gust of 60 mph was reported at Olmstead.

Thunderstorm Wind in POPE, ARKANSAS
From 06-OCT-19 18:26:00 to 06-OCT-19 18:26:00 (CST-6)
Location: ATKINS
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A large tree was blown down across portions of the eastbound lanes of Interstate 40.