You alter wind force in the area surrounding you. You can make the
wind blow in a certain direction or manner, increase its strength, or
decrease its strength. The new wind direction and strength persist
until the spell ends or until you choose to alter your handiwork,
which requires concentration. You may create an “eye” of calm air up
to 80 feet in diameter at the center of the area if you so desire, and
you may choose to limit the area to any cylindrical area less than
your full limit.
Wind Direction: You may choose one of four basic wind patterns to
function over the spell's area.
A downdraft blows from the center outward in equal strength in all
An updraft blows from the outer edges in toward the center
in equal strength from all directions, veering upward before impinging
on the eye in the center.
A rotation causes the winds to circle the
center in clockwise or counterclockwise fashion.
A blast simply causes
the winds to blow in one direction across the entire area from one
side to the other.
For every three caster levels, you
can increase or decrease wind strength by one level. Each round on
your turn, a creature in the wind must make a Fortitude save or suffer
the effect of being in the windy area.
Strong winds (21+ mph) make sailing difficult.
A severe wind (31+ mph) causes minor ship and building damage.
A windstorm (51+ mph) drives most flying creatures from the skies,
uproots small trees, knocks down light wooden structures, tears off
roofs, and endangers ships.
Hurricane force winds (75+ mph) destroy wooden buildings, sometimes
uproot even large trees, and cause most ships to founder.
A tornado (175+ mph) destroys all nonfortified buildings and often
uproots large trees.
The important thing to observe here (Assuming a Druid) is that: you can create a tornado from ''calm'' winds (<21mph) but requires 15 caster level, (even though Control Winds is a level 5 spell and that Control Weather is a level 7 spell at level 13 you can cast Control weather but not do so) so with this observation you might not be able to do as you please with the wind force after all... Ask your DM once again how he will rule Control Weather. (see last point in the conclusion for a way around this via RAW)