  Let $M_k^\sharp(N)$ be the space of weakly holomorphic modular forms for
$\Gamma_0(N)$ that are holomorphic at all cusps except possibly at $\infty$. We
study a canonical basis for $M_k^\sharp(2)$ and $M_k^\sharp(3)$ and prove that
almost all modular forms in this basis have the property that the majority of
their zeros in a fundamental domain lie on a lower boundary arc of the
fundamental domain.
