It's
been raining a lot this summer. The traditional explanation is that
the rain comes just after ranchers have cut their hay and have it
spread out to dry before baling and stacking it.
To
scientists, the summer rains are from the North American Monsoon
(also called the Southwest U.S., Mexican or Arizona Monsoon). An area
of high atmospheric pressure develops over the Four Corners, changing
the wind flow so that moisture arrives from the tropical Pacific
Ocean and the Gulfs of Mexico and California. It typically begins in
early July in southern Arizona and moves north, with drier weather
returning in September.
This
year, it started a little earlier than usual, and it's provided more
moisture than usual. Buena Vista, for instance, had the
second-wettest July on record, with 3.57 inches recorded at Central
Colorado Regional Airport. Only 1968 was wetter, at 4.68 inches, and
the average is 1.62 inches. This year was quite dry before July, with
a total of only 1.98 inches for the first six months of 2006; the
average total for January through June is 4.15 inches.
Soooo....
At the end of July, our precipitation level had gone from being way
below average to slightly below. The average from January to July is
5.69 inches; whereas we had 5.55 at the end of July -- and it was
still raining steady in early August.