An analysis of the graph yields precipitation intensity as well as rain totals. Most of the U.S. lies within the northern hemisphere zone of westerlies. Sandstorm conditions accompanied the heat. Chicago does not have a well-defined wet season. An imprecise, general term for a small-scale rotating column of air that is in contact with the ground.
More specific terms are dust devil, waterspout and tornado.
The appellation applied to Antarctica, whose unique weather and geography have resulted in a permanent ice cap over which the air is intensely cold and dry, and very little precipitation falls. Frost, which forms in a subfreezing environment, is not frozen dew. Neither shadows, horizon, nor clouds are discernible. A sense of depth and orientation is lost. The horizontal motion of air relative to the surface of the earth.