During the period 27 to 29 December 1958, the Detroit-Windsor area experienced a prolonged inversion. Winds were light, visibility was poor, and air pollution levels were high. The circumstances surrounding the event are described on both the synoptic and the meso scales.

The broad features, a stationary ridge of high pressure and a light southeast gradient of stable air, fit the classical inversion picture. However, there are interesting small-scale details. In particular, a cooling at 300 ft on the morning of December 29th is described and is shown to be consistent with other available data including observations from a 100-ft tower at Lagoona Beach, Michigan.

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1 Published by permission of the Director, Meteorological Branch, Department of Transport, Canada.