Early November with little snow
A MODIS-based true-color cloud-free image, above, from SSEC’s Real Earth (link) shows a distinct lack of snow cover — for early November!!! — over the USA and Canada. These BRDF (Bidirectional Reflectance Distribution Function) fields account for sun angle, viewing angle and surface type; data over the past 16 days are used in this computation. Monitor these fields at the RealEarth link in the coming weeks to see the inevitable (albeit delayed!) increase in snow cover over North America!