most_unstable_parcel

metpy.calc.most_unstable_parcel(pressure, temperature, dewpoint, heights=None, bottom=None, depth=<Quantity(300, 'hectopascal')>)[source]

Determine the most unstable parcel in a layer.

Determines the most unstable parcel of air by calculating the equivalent potential temperature and finding its maximum in the specified layer.

Parameters

  • pressure (pint.Quantity) – Atmospheric pressure profile

  • temperature (pint.Quantity) – Atmospheric temperature profile

  • dewpoint (pint.Quantity) – Atmospheric dewpoint profile

  • heights (pint.Quantity, optional) – Atmospheric height profile. Standard atmosphere assumed when None (the default).

  • bottom (pint.Quantity, optional) – Bottom of the layer to consider for the calculation in pressure or height. Defaults to using the bottom pressure or height.

  • depth (pint.Quantity, optional) – Depth of the layer to consider for the calculation in pressure or height. Defaults to 300 hPa.

Returns

  • pint.Quantity – Pressure, temperature, and dew point of most unstable parcel in the profile.

  • integer – Index of the most unstable parcel in the given profile

See also

get_layer()