Extra Tropical Cyclone

Typically the semi-permanent high pressure system over Uruguay moderates the weather and prevents seasonal storms. Likewise, the similar densities of humid air masses creates a uniformly mild climate with uniform annual precipitation. However, in Spring 2005 a massive cyclone devastated Montevideo when a cold front moved in over Argentina, gaining moisture over the river valley to the east of the most populated city in the country.

The tropical cyclone of 2005 occurred in a more Northern latitude  than usual.
http://www.ncdc.noaa.gov