Other forms: pamperos
A pampero is a type of strong wind, often bringing thunder, lightning, and rain, that frequently blows across the grasslands of Argentina and neighboring countries in South America.
The word pampero comes from pampas, the broad grassy plains that cover Uruguay and parts of Argentina, Paraguay, and southern Brazil. Bursts of cold air from Antarctica or from the nearby Andes mountain range sweep across these plains. The winds are often dry, but other times bring wet weather and thunderstorms. Pamperos are most common in the southern hemisphere's winter (roughly May through August), and they can sometimes be destructive, so if you're in the neighborhood when the season starts, make sure all your doors and windows are closed.