Prediction of solar cycle evolution. Panel (a) shows the evolution of the polar field, with the black curve representing observations from HMI; the blue solid and dashed curves representing the average values of predictions for the southern and northern hemispheres, respectively; and the red curves representing the corresponding 1 standard deviation ranges. Panel (b) shows the evolution of the axial dipole moment, with black representing observations from HMI, blue representing average of predictions, and red representing 1 standard deviation ranges.