Coach Schnieder and the Lady Plainsmen tried to pull it together in the second half.
But AHS was just too strong. Lexi Ohair found Abby Betts for a lay-up to make it 34-13.
Monterey would answer in the form of a Shazay Norris jump shot to pull within 19.
But Amarillo finished with a flourish, beating Monterey 54-40.