lcl#

metpy.calc.lcl(pressure, temperature, dewpoint, max_iters=50, eps=1e-05)#

Calculate the lifted condensation level (LCL) from the starting point.

The starting state for the parcel is defined by temperature, dewpoint, and pressure. If these are arrays, this function will return a LCL for every index. This function does work with surface grids as a result.

Parameters:

pressure (pint.Quantity) – Starting atmospheric pressure
temperature (pint.Quantity) – Starting temperature
dewpoint (pint.Quantity) – Starting dewpoint
max_iters (int, optional) – The maximum number of iterations to use in calculation, defaults to 50.
eps (float, optional) – The desired relative error in the calculated value, defaults to 1e-5.

Returns:

pint.Quantity – LCL pressure
pint.Quantity – LCL temperature

Examples

>>> from metpy.calc import lcl
>>> from metpy.units import units
>>> lcl(943 * units.hPa, 33 * units.degC, 28 * units.degC)
(<Quantity(877.563323, 'hectopascal')>, <Quantity(26.7734921, 'degree_Celsius')>)