The forecast through July indicates that the extent of exceptional water deficits on the continent will shrink somewhat but deficits will dominate much of the northern bulk. Exceptional deficits are forecast for French Guiana, Suriname, and southern Venezuela, central Brazil, the southern Amazon Basin, many Brazilian rivers, and along the Pacific Coast from Lima through the Atacama Desert. Surpluses are expected to increase in Paraguay and will be exceptional in central Paraguay.
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The extent of exceptional water deficit in the region will diminish considerably through December, though deficits will cover most of Brazil and will be intense across the north, in Mato Grosso, São Paulo, and Paraná. Intense deficits are also forecast in Bolivia from east of La Paz through Cochabamba to the south, and from southern Peru through the Atacama Desert in northern Chile past Santiago. Surpluses will persist in Uruguay, and in Entre Rios and Buenos Aires Provinces in Argentina, and will emerge in Rio Grande do Sul, Brazil.
The near-term forecast through November indicates that exceptional water deficits will diminish considerably in Brazil, but intense deficits are expected across the north and moderate deficits in much of the rest of the country. Deficits are also forecast for Brazil’s northern neighbors, and in Peru, southern Bolivia, and Chile, where conditions may be exceptional. Surpluses will moderate in central Colombia; downgrade slightly in Huánuco, Peru; and shrink somewhat in Entre Ríos and Buenos Aires Provinces in Argentina.
Exceptional deficits will diminish in South America over the next several months but large pockets of intense deficit are forecast for Brazil in Acre, Rondônia, Pará, Tocantins, Goiás, western Minas Gerais, Mato Grosso, northern Mato Grosso do Sul, and São Paolo. Deficits are also expected to be intense in: northern and southeastern Venezuela; western Ecuador; western Peru; most of Chile, especially the Atacama Desert and Bío Bío; and, Río Chubut in Patagonian Argentina. Surpluses will downgrade in central and eastern Colombia, but will be severe.
Exceptional water deficits will diminish over the next few months but large pockets are forecast for Brazil in Acre, Rondônia, Pará, Tocantins, Goiás, western Minas Gerais, northern Mato Grosso do Sul, and São Paolo. Deficits elsewhere include: Venezuela surrounding Caracas; western Ecuador; a path from east of Lima, Peru through the Atacama Desert in Chile; and, along the Río Paraguay. Surpluses are forecast for Peru’s Huánuco Region; central and eastern Colombia into Apure, Venezuela; southeastern Peru into central Bolivia; and, the eastern Argentine Pampas.
Recently observed water conditions across the whole of South America are expected to persist through the near-term forecast period with widespread exceptional water deficits spanning the whole of northern Brazil and the Amazon basin. Exceptional surpluses in central Argentina and southern Paraguay persist in the near-term before moderating in the later forecast periods. In the September through November period, severe to exceptional deficits are expected to persist in northern Chile and across the northern states of Brazil including Roraima, Pará, and Amapá.
South America: Water deficits persist in the Amazon Basin, surpluses forecast in Venezuela’s Orinoco Basin
The forecast continues to indicate widespread and in many areas exceptional water deficits across northern South America, particularly in the Amazon Basin. Water surpluses are forecast May through July in Venezuela’s Orinoco and Caroni River Basins and in much of Guyana. Water surpluses will persist in Rio Grande do Sul, Brazil; Uruguay; and central Argentina.