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.
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Regions forecast to have significant water deficits for the 12-month period from April 2018 through March 2019 include: southern Mexico, northern Brazil, North Africa, Europe, and Afghanistan. Areas with a forecast of significant water surplus include: Montana and Idaho (US), Tanzania, Kenya, Uganda and Bangladesh. This Watch List is based on ISciences Water Security Indicator Model (WSIM) run on 10 July 2018.
Exceptional water deficits will diminish over the next few months, but large pockets are forecast for Brazil in Acre, Rondônia, Pará, Tocantins, Goiás, Minas Gerais, Mato Grosso do Sul, and São Paolo. Intense deficits elsewhere include: Venezuela east of Lake Maracaibo and near the border with Guyana; southern Bolivia; and along a path beginning south of Lima, Peru, through northern Chile. Deficits in Argentina will moderate and surpluses will emerge in northern Buenos Aires Province.
The extent of exceptional deficit will diminish considerably over the next few months. However, pockets are forecast in Amapá, Amazonas, Acre, Maranhão, Goiás, Minas Gerais, Mato Grosso do Sul, and São Paolo, Brazil; and, southeastern Venezuela, eastern Suriname, and French Guiana. Exceptional deficits in northeastern Argentina will downgrade to severe. Surpluses are forecast for northern Bolivia and eastern Paraguay. After June, moderate to severe deficits will continue to emerge across the northern bulk of the continent. Aforementioned deficits in Argentina will moderate.
The April 2018 Outlook indicates wetter than normal conditions in India, East Africa, and northwest Brazil. Significantly warmer than normal temperatures are forecast for Far East Russia and Alaska, much of eastern China, particularly the Yangtze River Basin from Shanghai to Chongqing, and eastern Australia from Brisbane to Canberra.
Exceptional water deficits are forecast to diminish considerably in the coming months, but pockets are forecast through April in southern Venezuela, Amapá (Brazil), western Brazil, western Ecuador, and around the Gulf of Corcovado in southern Chile. Deficits are also forecast in southern Colombia, northern Peru, Uruguay, Rio Grande do Sul (Brazil), and northeastern Argentina. Surplus is forecast in northeastern Venezuela, scattered throughout eastern Brazil, northern Bolivia, and eastern Paraguay. After April, the extent of anomalous water conditions will shrink.
Regions forecast to have significant water deficits for the 12-month period from November 2017 through October 2018 include: California, Nevada, Arizona, Louisiana, Arkansas, Mississippi, Venezuela, French Guiana, Gabon, Mongolia, and Tasmania. Areas with a forecast of significant water surplus include: Ireland, Poland, European Russia, Tanzania, and Philippines. This Watch List is based on ISciences Water Security Indicator Model (WSIM) run on 6 February 2018.
Much warmer than normal temperatures are forecast in February for the US West, the Baja Peninsula, the Tibetan Plateau, and far northeastern Russia, including the Kamchatka Peninsula. Nearly all of India will be warmer than normal. Paraguay is expected to be cooler than normal. Eastern Brazil should see above average rainfall, as will central Mexico and western India.
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.