Why does a stationary front stay in the same place?

Answer 1

Fronts become stationary because the stationary front is like a stand-off between a cold front and a warm front. The warm front is trying to get on top of the warm front and make a warm front, while the cold front tried to avance on the warm front. Neither are successful, so they just stand there waiting for each other to move and one to become dominant. They stay where they are until one other front pushes them away.

Answer 2

A stationary front is a boundary between two different air masses, neither of which is strong enough to replace the other. On a weather map, this is shown by an inter-playing series of blue spikes pointing one direction and red domes pointing the other.[1] They tend to remain essentially in the same area for extended periods of time, and waves sometimes propagate along the frontal boundary. A wide variety of weather can be found along a stationary front, but usually clouds, prolonged precipitation, and storm trains are found there. Stationary fronts will either dissipate after several days or devolve into shear lines, but can change into a cold or warm front if conditions aloft change.

A stationary front becomes a shearline when the density contrast across the frontal boundary vanishes, usually as a result of temperature equalization, while the narrow zone of wind-shift persists for a time. This is most common over the open ocean as the temperature of the ocean surface is usually the same on both sides of the frontal boundary and modifies the air masses on either side of it to correspond to its own temperature. Stationary fronts always stay still.

Answer 3

Stagnant air masses cause stationary fronts. Air masses that just can't move because of other air masses pushing into it cause stationary fronts that sometimes lead to rain storms.