Iguape, Brazil

Weather Underground Forecast for Wednesday, May 23, 2012.

Tropical Depression Alberto will continue weakening on Wednesday as it continues on a northeastward track across the colder waters of the western Atlantic Ocean, before possibly dissipating by Thursday. For more information on Tropical Storm Alberto, please visit http://www.wunderground.com/tropical.

Meanwhile, in the Caribbean, a trough of low pressure will remain situated over the northwestern Caribbean Sea. This system will support more scattered shower and thunderstorm development in much of the northwestern and north-central basin, Cuba, and Jamaica. To the south, more scattered light to moderate showers are expected in Central America and the southwestern basin. To the east, light showers and chances of thunderstorms will persist in the Windward Islands.

For South America, typical rain and thunderstorms will develop in the northern countries of the continent, while high pressure provides generally calm conditions to much of southeastern Brazil. To the south, light to moderate showers with periods of locally heavy rain and chances of thunderstorms will continue across Paraguay into Uruguay, spreading into areas of Rio Grande do Sul. Further south, windy conditions with increased cloud cover and light showers are expected for southern Chile and portions of southern Argentina.