be produced in the neighbourhood of its cause, and the cause of
winds moves with the sun.
Contrary winds have either the same or contrary effects. Thus Lips
and Caecias, sometimes called Hellespontias, are both rainy gestes and
Eurus are dry: the latter being dry at first and rainy afterwards.
Meses and Aparctias are coldest and bring most snow. Aparctias,
Thrascias, and Argestes bring hail. Notus, Zephyrus, and Eurus are
hot. Caecias covers the sky with heavy clouds, Lips with lighter ones.
Caecias does this because it returns upon itself and combines the
qualities of Boreas and Eurus. By being cold it condenses and
gathers the vaporous air, and because it is easterly it carries with
it and drives before it a great quantity of such matter. Aparctias,
Thrascias, and Argestes bring fair weather for the reason we have
explained before. These winds and Meses are most commonly
accompanied by lightning. They are cold because they blow from the
north, and lightning is due to cold, being ejected when the clouds
contract. Some of these same bring hail with them for the same reason;
namely, that they cause a sudden condensation.
Hurricanes are commonest in autumn, and next in spring: Aparctias,
Thrascias, and Argestes give rise to them most. This is because
hurricanes are generally formed when some winds are blowing and others
fall on them; and these are the winds which are most apt to fall on
others that are blowing; the reason for which, too, we have
The Etesiae veer round: they begin from the north, and become for
dwellers in the west Thrasciae, Argestae, and Zephyrus (for Zephyrus
belongs to the north). For dwellers in the east they veer round as far
So much for the winds, their origin and nature and the properties
common to them all or peculiar to each.