When cold and warm air masses meet, nor does it have enough power to move the other, a stationary front is formed. Along the front the suspension is very weak and storms are rare as a result. Because stationary fronts moves very little, they can cause constant rain or snow over the same general area for many days. Many flooding and heavy snow events are caused by stationary fronts, sometimes referred to as the “stand” over an area.
A warm front occurs when a warm air mass moved into an existing mass of cool air. Because the warm air is already in progress and the cold air is stationary, force warm air lifts over the cold air with much less. This leads to a lot less energy for storm development and often causes steady, prolonged rain and occasional weak storms instead. Because warm fronts move more slowly than cold fronts, item rain generally a longer period of time.