Fig. 2. Variations of mean rotational velocity values for the average-sized mesocyclone signature as a function of range for (a) 1.0o and (b) 0.5o azimuthal sampling intervals. The solid curve represents the average of the mean rotational velocity values. Shading represents the full spread of velocity values for all angular separations between radar beam centers and vortex centers. In (a), the dotted curve corresponds to the heavy solid curve in (b); the dotted curve in (b) to the heavy solid curve in (a). In (b), the thin horizontal line intersects the two curves at 17 m s-1 (see text).