Quasi-stationary front

quasi-stationary front

(Commonly called stationary front.) A front that is stationary or nearly so.

Conventionally, a front that is moving at a speed less than about five knots is generally considered to be quasi-stationary. In synoptic chart analysis, a quasi-stationary front is one that has not moved appreciably from its position on the last previous synoptic chart (three or six hours before).

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1. In synoptic meteorology, a detailed study of the state of the atmosphere based on observations, usually including a separation of the entity into its component patterns and involving the drawing of families of isopleths for various elements.