Predicting Weather By The Moon - Xavier University Libraries

Weather By The Moon
and so much will be in place. The atmospheric tide will be
nearly the same. 38 years is also a guide. If records have
been assiduously collected at one locality in question, so
much the better. When you adjust for perigee – bingo, you
can predict the weather.
By way of example, above are two maps, 19 years apart,
being 1/1/03 on the left(courtesy NZ Herald) and 1/1/84
on the right. The double-centred high is common to both,
as is a low sitting to the north of NZ.
The Moon is in the sky again in the same position with
respect to the background of stars one lunar year later. The
lunar year differs from the solar year by up to 10 days.
Therefore, 353-355 days is another cycle worth looking
at. One goes back a year then
comes forward by 7-10 days.
It is not exact, because a year
is not as good as 19 in terms
of averages. So in the example
above, which is the weather
for 1/1/03, one would look at
7-11th January 2002
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