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.
The legend is very popular in Argentina and Uruguay, especially around the Rio de la Plata area (including Buenos Aires and Montevideo) and the Argentinian province of Córdoba and the Cuyo region, west of Buenos Aires.(wikipedia.org/wiki/Santa_Rosa_storm)