  We analyse the process $\tau^-\to\nu_\tau\pi^-\pi^0$ allowing for anomalous
weak charged current magnetic and electric dipole moment interactions and
determine the effects on the differential and total decay rates. Using recent
experimental data we determine the following values for the anomalous magnetic
and electric dipole moment parameters, respectively:
  $\kappa = 0.16 \pm 0.08; and |\tilde\kappa| = 0.88^{+0.25}_{-0.35}.$
