This will allow them to feed on the moist inflow ahead of the gust front. The cell motion and the speed of the gust front may be the same, leading to a continual redevelopment of new cells. Strong Shear - Rotation now occurs through the tilting of horizontal vorticity inherent in the sheared environment. This also promotes propagation that varies from the mean wind. The lowest 1 - 2 km environment has the most influence on the nature of the storm, and therefore since the climatological environment favors the clockwise turning hodograph, the majority of severe storms rotate cyclonically.
Heights are in kilometers.
Click for a larger image Click for a larger image Updraft evolution in weak and strong wind shear conditions for unidirectional and clockwise-curved wind shear profiles. L is the approximate position of significant mid-level mesolow features. A classic curved Hodograph can be found here.