Liquid Water Content (LWC) refers to the amount of liquid water present in a given volume of air, typically expressed in grams per cubic meter (g/m³) or as a percentage of the total mass of the air sample. LWC is an important parameter in meteorology and atmospheric science because it plays a critical role in processes such as cloud formation, precipitation, and atmospheric chemistry. In the context of clouds, LWC represents the amount of water droplets that are suspended in the air.
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The local mass of suspended liquid water per unit volume, in . Integrating this quantity vertically gives liquid-water path; it is not the total moist-air density.