The ornamental design for a turnoutblanket, as shown and described.
FIG. 1 is a right side elevation view of the turnout blanket showing the new design as worn by a horse, this view being a mirror image of the left side elevation view thereof;
FIG. 2 is a top plan view thereof shown on a planar surface;
FIG. 3 is a bottom view of FIG. 2;
FIG. 4 is a front elevation view of FIG. 1; and,
FIG. 5 is a rear elevation view of FIG. 1.
The broken lines in the drawings are for illustrative purposes only and form no part of the claimed design.