THE GIRL There are two supplementary phenomena: that of the Child and that of the Girl. The La Niña phenomenon can last from 9 months to 3 years and according to its intensity is classified as weak, moderate and strong. It is stronger the shorter its duration, and its greatest impact on weather conditions is observed in the first 6 months of the phenomenon's life. The effect in Chile is to transfer the morning trough from the coastal zone, covering the city area at medium altitude, so that temperatures increase and endure due to the greenhouse effect, but by the same coverage the peaks that occur during the Niño current are not reached.