He āwhata hei whakaatu i te kaha o te hau. Ka tīmata i te kore (he āio, kāore te hau e pupuhi ana), ā, ka eke atu ki te 17. He haumātakataka e tohua ana ki ngā tau mai i te 12 ki te 17 o tēnei āwhata. Nā Francis Beaufort o Ingarangi tēnei āwhata i waihanga i te tau 1805, engari e rua, e toru rānei ngā whakahoutanga i roto i ngā tau o muri mai.
A scale to measure the intensity of the wind. The scale goes from zero (indicating calm or no wind) to 17. Various levels of hurricane are indicated by the numbers 12 to 17 on this scale. The scale was created by Francis Beaufort in 1805, but has undergone several refinements since this time.