I couldn't find a Jim Seals with these children. I did find a "West" Seals. Since your relative had the middle name Wesley I thought this might be him.

1930 Census Southeast, Winston Co., MS
West Seals Head M Neg 49 married at age 25 b. MS Father MS Mother MS Occu: farmer
Carrie Seals Wife F Neg 40 married at age 20 b. MS Father MS Mother MS
Lena Seals Daughter F Neg 20 widow married at age 17?* b. MS Father MS Mother MS
Prentiss Seals Son M Neg 18 single b. MS Father MS Mother MS
Lonnie Seals Daughter F Neg 12 single b. MS Father MS Mother MS
W. C. Seals Grandson M Neg 3 single b. MS Father MS Mother MS
L. C. Seals Grandson M Neg 6mon single b. MS Father MS Mother MS

*The part about how old Lena was when she married has been erased. I can just barely make out what was originally written.