metpy.calc.cross_totals(pressure, temperature, dewpoint)#

Calculate Cross Totals from the pressure temperature and dewpoint.

Cross Totals formula derived from [Miller1972]: CT = Td850 - T500


Td850 is the dewpoint at 850 hPa T500 is the temperature at 500 hPa

Calculation of the Cross Totals is defined as the difference between dewpoint at 850 hPa and temperature at 500 hPa. This is a part of the Total Totals Index.

  • pressure (pint.Quantity) – Pressure level(s), in order from highest to lowest pressure

  • temperature (pint.Quantity) – Temperature corresponding to pressure

  • dewpoint (pint.Quantity) – Dewpoint temperature corresponding to pressure


pint.Quantity – Cross Totals