Predicting Weather By The Moon - Xavier University Libraries

What Causes
Weather?
The Moon gives us pleasant balmy weather but also severe damaging
storms and all that which is in between
Wherever the Moon happens to be around the globe,
it affects the weather there. Also relevant is the time in its
monthly cycle and its closeness(perigee). Most bad
weather occurs in the second half of the Moon’s phase,
that is, between Full Moon and New Moon, particularly in
the week after the Moon is Full. Tornadoes occur before
the Moon rises or after it has set, that is, when it is absent
from the sky, which means at night during New Moon or
day during Full Moon/Last Quarter. The same goes for hailstorms
and cloudbursts.
Whirlwinds and waterspouts also occur at this time,
but need heat ascending and so occur more in the summer
months or in equatorial conditions.
At Apogee(Moon furthest from Earth) the atmospheric
tide is not as high on the Moon’s side, so then not
as shortened on the opposite side either. As the atmospheric
effect is the one on the opposite side to where the
Moon is, there tends to be fairer weather at Apogee when
the Moon is not in the sky than is normally the case.
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