A low pressure system has lower pressure at its center than the areas around it. Winds blow towards the low pressure, and the air rises in the atmosphere where they meet. As the air rises, the water vapor within it condenses forming clouds and often precipitation too.
Also to know is, are cold fronts high or low pressure?
Because air is lifted instead of being pressed down, the movement of a cold front through a warm front is usually called a low-pressure system. Low-pressure systems often cause severe rainfall or thunderstorms. Warm fronts usually show up on the tail end of precipitation and fog.
What kind of weather is associated with a low pressure area?
Or: “expect rain to spread into the area as a low pressure system approaches.” It is well established that high pressure is generally associated with nice weather, while low pressure is generally associated with cloudy, rainy, or snowy weather.
How does air pressure affect fronts?
The differences in the temperature, pressure, density and moisture content of the air masses makes one front slide over the other one, which can affect weather patterns by creating cloudy skies, thunderstorms and gusty winds. Thunderstorms occur when warm, wet air rises quickly. This rising air is called an updraft.