Missing microwave data from 1989 pentad 7 to 1991 pentad 67 Three-way blending spans from 1987 pentad 43 to 2000 pentad 73.
Red grid cells represent areas where the visible satellite product does not indicate snow but
both interpolated station and microwave satellite products show snow. Blue grid cells represent areas
where the visible satellite product indicates snow but both interpolated station and
microwave satellite products do not show snow.