On a merry-go-round in the night
Coriolis was shaken with fright
Despite how he walked
'Twas like he was stalked
By some fiend always pushing him right
or :
Fc = -2mΩ v
Where v is the velocity of the particle in a rotating system, and
Ω is the angular velocity vector and the
× symbol represents the cross product operator. Times all that by the mass of the object and voila! Coriolis Force.
Got all that?
A video
here might help if you are still in the dark.