The featured chart presents a simple hourly wind speed climatology for Ames by month. The summer months of July and August generally have the slowest wind speeds with April and March having the strongest. Near surface wind speeds are driven by horizontal pressure gradients, which are the weakest during the aforementioned months. The chart also nicely shows the diurnal cycle with solar heating of the ground and then the air causing the lower atmosphere to vertically mix, which transports momentum aloft to the surface.

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Tags:   wind