Owing to the generally elevated character of the southeastern section of
the Black Mesa Reserve, containing three mountain peaks rising above
10,000 feet, the annual precipitation is decidedly greater than
elsewhere on the reserve. The summer rains are irregular in character,
being abundant in some seasons and very scanty in others; but there is
always enough rainfall about the extreme head of Black River to make
grass, although there is always much hot, dry weather between May and
October. The fall and winter storms are more certain than those of
summer, and the parts of the reserve lying above 8,000 feet are usually
buried in snow before spring--frequently with several feet of snow on a
level. The amount of snow increases steadily with increase of
altitude. Some of the winter storms are severe, and on one occasion,
while living at an altitude of 7,500 feet, I witnessed a storm during
which snow fell continuously for nearly two days. The weather was
perfectly calm at the time, and after the first day the pine trees
became so loaded that an almost continual succession of reports were
heard from the breaking of large branches.
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