Santa Rosa storm
The Santa Rosa Storm occurs in the Southern Hemisphere up to five days earlier than or five days later than the festival of Santa Rosa of Lima, Perú, celebrated on August 30 each year.
Legend has it that Isabel Flores de Oliva, a.k.a. Rosa de Lima, caused a mighty storm which prevented Dutch pirates from attacking the city of Lima in 1615. However, meteorologists attribute the storm to the clash of the first warm winds which are a product of the arrival of spring with cold fronts.