Frost line depth in Craighead County, AR
How deep the ground freezes in Craighead County, AR
12 in. Dig to 13 in, just below the frost. Nearest NOAA station: Jonesboro Muni Ap, 0.9 mi.
Your building department sets the legal frost line depth (IRC Table R301.2(1)); footings must go below it (R403.1.4.1). Call them before you dig.