In the video: The satellite loop showed lots of clouds (blue/white/green colors) from the Tennessee Valley to the central Gulf Coast during the morning of 01/19/2019. This is where scattered strong to severe thunderstorms popped up in a mild atmosphere. More clouds were in northern Arkansas, with areas of snow developing in much colder air.
 

It was far too mild for winter weather early on January 19th. During the wee hours, showers and scattered thunderstorms became widespread. One storm produced golfball size hail at Foreman (Little River County). Lightning struck a home near Butlerville (Lonoke County) and caused minor damage. 

By 1000 am CST, the weather was rapidly changing. Northern and western sections of Arkansas had temperatures in the 20s and 30s. It was 26 degrees at Fayetteville (Washington County) and 28 degrees at Harrison (Boone County). Given northwest winds at 15 to 20 mph and some gusts over 30 mph, wind chill index values were in the single digits at several locations. Meanwhile, it was still 59 degrees at Monticello (Drew County) and 57 degrees at West Memphis (Crittenden County).

At this time, drier air mostly shut off rain across the southern counties. Farther north/west, there was enough moisture to keep precipitation going. As temperatures dropped, it was cold enough for snow.  

 

Estimated snow accumulations on 01/19/2019.
In the picture: Estimated snow accumulations on 01/19/2019.
 

One to three inches of snow was common across the north and west. There were spotty reports of more than four inches, and isolated instances of half foot accumulations.

 

Half of foot of snow fell at Booneville (Logan County) during the morning of 01/19/2019. The photo is courtesy of Jamey Dodson and Brad Taylor.
In the picture: Half of foot of snow fell at Booneville (Logan County) during the morning of 01/19/2019. The photo is courtesy of Jamey Dodson and Brad Taylor. Click to enlarge.
It was a winter wonderland along Highway 27 south of Marshall (Searcy County) on 01/20/2019. The photo is courtesy of Bob King.
In the picture: It was a winter wonderland along Highway 27 south of Marshall (Searcy County) on 01/20/2019. The photo is courtesy of Bob King. Click to enlarge.
 

The highest amounts included 7 inches at Big Flat (Baxter County), 6 inches at Booneville (Logan County), 5 inches at Hardy (Sharp County) and Pocahontas (Randolph County), and 4 inches at Mansfield (Scott County), Marshall (Searcy County), Mountain View (Stone County), and Mount Magazine (Logan County).

 

Link of Interest
Detailed List of Snow Accumulations