Fig. 10(a). Maps of `snowfall week' of individual years, (a) 1976.
Black areas are always snow-covered, and grey areas are always snow-free in Weeks 36 - 52 of that year.
Fig. 10(b). Maps of `snowfall week' of individual years, (b) 1977.
Black areas are always snow-covered, and grey areas are always snow-free in Weeks 36 - 52 of that year.