South America autumn forecast: Brazil drought to ease; Early rains to soak Colombia to Chile

By Brian Lada

Wet weather will frequent large portions of South America throughout autumn; however, dry spells will dominate the weather pattern in southern and northern parts of the continent.

The long-term drought that has plagued Brazil will begin to ease this autumn, though the heaviest and most beneficial rain will be mainly confined to southern portions of the country.

The season will get off to a wet start from Colombia through Chile before being replaced by drier conditions for the second half of the season.

Flooding rain, severe weather to target Bolivia, Paraguay, southern Brazil

Some of the most active weather across South America this season will stretch from eastern Bolivia to southern Brazil.

Excessive rain may lead to flooding issues that could affect the crops in the area, according to AccuWeather Senior Meteorologist Rob Miller.

Depending on when the rain falls, it could interfere with the process of harvesting across the region.

“It’s not even out of the question that there could be some severe weather in Paraguay and into southern Brazil,” Miller said.

This could include thunderstorms strong enough to produce damaging winds, large hail and flash flooding.

Some cities that may experience severe storms of this nature include Santa Cruz, Bolivia; Asuncion, Paraguay; Rio de Janeiro, Brazil; and Buenos Aires, Argentina.

A couple drives a makeshift raft on a flooded street of the Banado Norte neighborhood in Asuncion, Paraguay, Sunday, Dec. 27, 2015. (AP Photo/Jorge Saenz)

Early rains to frequent Colombia to Chile

Bouts of rain are expected to frequent swaths of South America stretching from Colombia to Chile and Argentina, but the rain will not be evenly distributed throughout the whole season for some of these areas.

El Niño will continue to influence the weather pattern across Chile into autumn, allowing for opportunities for rain in March and April. However, as El Niño weakens and the calendar turns to May and June, Chile will begin to experience drier-than-normal conditions.

The drier weather during the second half of the ski season may end up hurting resorts in central Chile that depend on mountain snow late in the season.

The exception to this will be in southern Chile where the autumn months favor a drier-than-normal weather pattern through most of the season.

Last year from March through June, Santiago, Chile, received only 6 mm (0.24 of an inch) or rain. While the city may receive more than this during March through June of this year, Santiago will likely finish the season below the normal rainfall amount of 165 mm (6.5 inches).


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