Rule: Divergence Aloft Also Is Associated With Patterns Aloft Associated With Strong Winds (Areas found at Jet Stream Levels)

If we can identify these areas, we can suspect that surface convergence and a disturbance will form at sealevel underneath them. These types of surface lows and highs are called generally "Dynamic Lows and Highs." Wave Cyclones are specific examples of dynamic lows, just as hurricanes are specific examples of thermal lows.

Rule: Once A Surface Disturbance (Cyclone) Forms, It Tends To Be Directed By the Average Direction of the Winds in the Mid Troposphere

A poor analogy is that the disturbances move with the current like a block of wood does in a river current, in the direction of the current and faster, the faster the current.