North Atlantic Basin Monthly Mean Shear Archive, 2005

These analyses depict vertical wind shear as calculated by subtracting the low-level layer-averaged flow (925-700mb) from the upper-level layer-averaged flow (150-300mb). The colored contours show the vector magnitude of the shear (absolute value).

In the case when a tropical cyclone is present, the analyses are modified in the storm region by a procedure which removes the storm circulation at prescribed radii. This allows a more representative depiction of the environmental shear acting on the storm.