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 microwave satellite product does not indicate snow but
both visible satellite and interpolated station products show snow. Blue grid cells represent areas
where the microwave satellite product indicates snow but both visible satellite and
interpolated station products do not show snow.