Warm Front

The boundary of an advancing warm air mass, which marks the leading edge of the warm sector of a low-pressure system.

Warm fronts can often lead to the presence of freezing precipitation (in winter), as well as embedded convection, and elevated (i.e. not surface based) thunderstorms. They provide the environment necessary for frontal fog to occur, and when coincident with the warm front, low-level jets can exacerbate associated low-level wind shear.