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stationary front A front which is stationary or nearly so. Conventionally, a front which is moving at a speed less than about 5 knots is generally considered to be stationary. In synoptic chart analysis, a stationary front is one that has not moved appreciably from its position on the last previous synoptic chart (3 or 6 hours before). Also called quasi-stationary front. The behavior and properties, including cloud sequences, of all fronts are presented in ART-12 on fronts. Stationary front properties are summarized in G205. G201 compares the properties of the major kinds of fronts. Practice questions on fronts are in T7.

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