A front with a speed of less than five knots is referred to as?

A front with a speed of less than five knots is classified as a stationary front. This type of front occurs when there is little to no movement in the air masses involved, resulting in a prolonged interaction between the warm and cold air. Stationary fronts can lead to extended periods of cloudy and wet weather as the air masses remain in place, continuously influencing the local weather conditions.

In contrast, cold fronts and warm fronts typically move at speeds greater than five knots, marking a more dynamic interaction between the air masses. An occluded front involves the interaction of three air masses, often resulting in more complex weather patterns. Therefore, the definition and characteristics of a stationary front align perfectly with the criterion of having a speed of less than five knots.