The January Outlook indicates much wetter than normal conditions forecast for southern China through the Pearl River Basin encompassing the Pearl’s northern tributaries; and, oceans away in Uruguay. Temperatures in Northeast China are expected to be exceptionally warmer than usual, anomalies with a return period of 40 or more years.
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Rio de Janeiro
A number of significant transitions are forecast for the next three months. Though exceptional water deficits will diminish across northern South America – transitioning to surplus in many northern nations and the northern Amazon Basin – deficits will intensify in eastern Brazil. Surpluses are forecast to emerge throughout Paraguay and into southern Brazil. Surpluses in Uruguay will transition to moderate deficit; Buenos Aires Province, Argentina will transition from surplus to near-normal. After March, water anomalies will moderate considerably across most of the continent.
A significant retreat of exceptional deficits is forecast November through January, though deficits are forecast for much of Brazil’s northern half and along its southeast coast from São Paulo to Rio de Janeiro. Intense surpluses are forecast for central Colombia and Venezuela’s northeastern coast into Trinidad and Tobago. Moderate surpluses are forecast for northern Peru, northern Bolivia, southern Paraguay, and Buenos Aires Province, Argentina. After February, a transition from deficit to moderate surplus is forecast for northern Amazonian Brazil.
Regions forecast to have significant water deficits for the 12-month period from August 2017 through July 2018 include: Amapá, Amazonas, and Maranhão (Brazil); Madhya Pradesh and Haryana (India); Cambodia; Fujian and Inner Mongolia (China); Mongolia; Papua New Guinea; and, South Australia and Tasmania (Australia). Areas with a forecast of significant water surpluses include: Bangladesh; Tripura, Mizoram, and Manipur (India), western Myanmar; the Yangtze River (China); Poland; and European Russia. This Watch List is based on ISciences Water Security Indicator Model (WSIM) issued 8 November 2017.
Regions forecast to have significant water deficits for the 12-month period from April 2017 through March 2018 include: Brazil, Europe, northern Africa, Gabon, Somalia, Saudi Arabia, Cambodia, South Korea, Tasmania, and Mongolia. Water surpluses are forecast for: the US Gulf Coast and Idaho, La Pampa (Argentina), western European Russia, eastern Romania, southeastern Tanzania, the Volga River Basin, between the Upper Ob and the Tom Rivers (Russia), Kazakhstan, Bangladesh, and the southern Yangtze River Basin. This Watch List is based on ISciences Water Security Indicator Model (WSIM) Global Water Monitor and Forecast issued 10 July 2017.
Over the next few months South America is forecast to transition away from widespread exceptional water deficits. However, from November through January pockets of extreme to exceptional deficits are forecast in western Amazonas and central Brazil, the Cordillera Real Mountains of Bolivia, and scattered down through the nations along the Pacific Ocean, particularly Chile. Surpluses are forecast for: central and eastern Colombia, northern Bolivia, the Amazon Basin from Manaus to Amapá, eastern Paraguay into Argentina, and La Pampa, Argentina. From February to April water deficits will continue to diminish, with the exception of Chile where areas of significant deficit will persist.
Over the next few months South America is forecast to transition away from widespread exceptional water deficits. However, from October through December exceptional deficits are forecast along Brazil’s northeastern coast, along with many parts of Chile, Tierra del Fuego, and the Falkland Islands. Surpluses of varying intensity are forecast in central Colombia, northern Peru, northern Bolivia, central Brazil, and northwestern Argentina. From January through March northern Brazil is forecast to transition from deficit to moderate surplus.
South America is forecast to transition away from widespread exceptional water deficits in December. However, from September through November exceptional deficits are forecast across northern Brazil along with moderate deficits reaching southward to Rio de Janeiro. Severe to exceptional deficits are forecast near Caracas, Venezuela; western Bolivia; Chile; rivers in southern Argentina; and the Falkland Islands. Surpluses are forecast in eastern Paraguay, and Paraná and Santa Catarina, Brazil. Overall, water deficit conditions will continue to diminish in extent and severity from December through May.
Regions likely to encounter significant water deficits in the coming months include: Ohio, Pennsylvania, the Missouri and Yellowstone Rivers, southern Mexico, Chile, Central and Eastern Europe, North Africa, Zambia, Saudi Arabia, Yemen, Siberia, Gujarat, Cambodia, South Korea, and Tasmania. Water surpluses are forecast for: Minnesota, Wisconsin, Louisiana; Paraguay; European Russia and the Volga Basin; the Chambal, Yamuna, and Ganges Rivers in India; Bangladesh; western Myanmar; Laos; and the Yellow, Yangtze, and Pearl Rivers in China. This watch list is based on ISciences' Water Security Indicator Model (WSIM) Global Water Monitor and Forecast issued 8 September 2016.