1911 Encyclopædia Britannica/Pampero

PAMPERO, the cold south-west wind which blows over the great plains of southern Argentina. The term is somewhat loosely applied to any strong south-west wind in that region, but more strictly to a rain squall or thunderstorm arising suddenly in the prevailing currents from north and north-east. Pamperos are experienced at Buenos Aires on an average about a dozen times in the year, chiefly during October, November and January.