The front you are referring to is called a cold front. Cold air is denser than warm air, so when a mass of cold air moves underneath warm, moist air, it lifts the warm air rapidly, leading to the formation of clouds and potentially precipitation.
A tornado.
A maritime polar air mass is characterized as a cold and moist air mass.
The warm moist air will be forced to rise over the cold dry air, leading to the formation of clouds and potentially precipitation. This is a common process in the creation of thunderstorms and rain showers.
Hurricanes depend on plentiful warm, moist air. A hurricane that encounters cold air will turn into a post-tropical cyclone.
A maritime polar air mass is composed of cold, moist air.
Cold and moist air is commonly associated with a weather condition known as fog. Fog forms when warm air cools, causing water vapor to condense into droplets near the ground. This creates a misty atmosphere that can reduce visibility.
The warm air mass carries warm moist air. The cold front brings cold, dense air. Because this cold air is denser, as it ploughs through the warm moist air it forces it upwards. This warm moist air being pushed up at speed is what causes cumulonimbus clouds to form along the cold front, and hence thunderstorms.
Advection fog results when moist air moved across a cold surface. When moving across a cold surface, the air is cooled to its dew point.
The front you are referring to is called a cold front. Cold air is denser than warm air, so when a mass of cold air moves underneath warm, moist air, it lifts the warm air rapidly, leading to the formation of clouds and potentially precipitation.
The air mass indicated by cold dry air is a continental polar air mass, designated as cP. This air mass originates over cold land regions and brings cold, dry conditions when it moves into other areas.
A tornado.
A maritime polar air mass is characterized as a cold and moist air mass.
Advection fog results when moist air moved across a cold surface. When moving across a cold surface, the air is cooled to its dew point.
A cold front is composed of cold, dense air that moves in to replace warm air. This often leads to unstable atmospheric conditions and can result in precipitation and strong winds.
"Fog" generally is composed of tiny droplets of water condensed from moist air as it cools. In a car it refers to the water condensed onto the cold windows. Warming the air and glass re-evaporates the water.
Continental polar is indicated by composed of cold dry air.