This Javascript calculator was designed to calculate lifting condensation level (LCL) conditions using only three atmospheric input parameters that are commonly measured and reported during most local televised weather forecasts: surface temperature, surface dewpoint, and surface pressure. Output is pressure and parcel temperature at LCL. Though this calculator was designed to calculate the lifting condensation level for a parcel of air lifted from the surface, you calculate the LCL conditions for an air parcel at any other pressure level by substituting values appropriately. There is also a link to a calculator that will convert temperature reading from Celsius to Fahrenheit to Kelvin units.
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