MFMAX-MFMIN

Surface snowmelt is affected by many climatic and physiographic factors.
The factor which most commonly is used to classify melt factors is forest cover.
The following values are typical:

Forest Cover	MFMAX	MFMIN
Coniferous forest	0.5 - 0.7	0.2 - 0.4
Mixed forest	0.8 - 1.2	0.1 - 0.3
Deciduous forest	1.0 - 1.4	0.2 - 0.6
Open areas	.9 - 2.2	0.1 - 0.6

In areas with no distinct accumulation and melt seasons, the maximum melt factors are generally similar to those given above.
However, the minimum melt factors are usually somewhat higher.
This is because in such areas, the snow cover is normally shallow and mid-winter thaws last long enough to completely ripen the snow surface.
In areas with a distinct accumulation season, winter thaw periods are usually brief and the albedo of the snow cover remains relatively high, this keeping MFMIN low.