Divergence is a property of fluids including the atmosphere.
In a column of air, the flow at some levels will be divergent, while at other levels it will be convergent. In general, the convergence in one part of the atmospheric column is nearly balanced by divergence in another part of the column, and the pressure at the surface never changes by more than a few percent. If the convergence in the lower layers exceeds the divergence aloft, surface pressure increases and the storm weakens. If the two are equal, the low pressure center maintains a steady pressure. Winds slowing down along the direction of flow would produce net inflow or speed convergence .