colder
As a cold front passes, the barometric pressure typically decreases. This is because the colder, denser air associated with the front is displacing the warmer, less dense air ahead of it, leading to a drop in pressure.
warmer than a cold front and colder than a cold front
When a warm front passes it leaves behind hotter tempatures and more humidity, it is replacing the cold air with warm air basically.
A front is an area of unsettled weather. In front of a cold front is warmer air. Behind a cold front is colder air. As the colder air meets the warmer air, the cold air rides over the warmer air and causes condensation. Rain happens. Since conditions are unsettled, winds blow. The warm air fights back. Sometimes tornadoes form. The cold front either wins and goes forward or collapses.
A cold front forms when a colder air mass moves towards a warmer air mass. As the denser cold air displaces the warmer air, it force the warm air to rise rapidly and generates thunderstorms and severe weather along the front.
A front where warmer air is replacing colder air is called a warm front. Warm fronts typically bring gentler weather conditions, such as a gradual increase in temperature, light rain or drizzle, and overcast skies.
As warm air is lifted over advancing cold air, itself cooled as its pushed away from gravity's pull at the Earth's surface, the water will begin to condense into clouds and precipitation will form, usually of the "showers and thunderstorms" variety.
A cold front is typically faster than a warm front. Cold fronts move more quickly due to the denser, colder air mass replacing the warmer air mass, leading to a more abrupt change in weather conditions. Warm fronts move more slowly as the warmer, less dense air gradually overtakes the colder air.
The type of front that occurred between 41 degrees F and 34 degrees F depends on the direction of the front. If the front is headed toward warmer air with colder air behind it, it is a cold front. If the front is headed toward colder air with warmer air behind it, it is a warm front. If the front is just sitting there, it is a stationary front. The temperature does not matter.
The forward edge of a cold air mass forms a cold front, which is a boundary where colder air displaces warmer air. This transition zone often leads to changes in weather patterns, such as storms and precipitation, as the colder, denser air moves in.
The transition zone where a cold air mass is replacing a warmer air mass.
The air behind a cold front is noticeably colder and drier than the air ahead of it. When a cold front passes through, temperatures can drop more than 15 degrees.