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.
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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.
The near-term forecast indicates that widespread water deficits will persist, though moderate, in Brazil. However, intense deficits are forecast for: Brazil’s far north into Suriname and French Guiana; Ceará and Rio Grande do Norte; north-central and southern Venezuela; Cochabamba, Bolivia; northern Chile; and Tierra del Fuego. Surpluses will persist in La Pampa and Buenos Aires Provinces, Argentina, and will emerge in Uruguay. After November deficits will retreat to eastern Brazil and surpluses will emerge in the northern Amazon Basin.
Regions forecast to have significant water deficits for the 12-month period from June 2017 through May 2018 include: Montana (US), Nayarit (Mexico), Amapá (Brazil), Italy, the Arabian Peninsula, Madhya Pradesh and Chhattisgarh (India), Cambodia, Mongolia, and Tasmania (Australia). Water surpluses are forecast for: US Gulf Coast, La Pampa (Argentina), Tanzania, Bangladesh, Tripura and Mizoram (India), western Myanmar, Laos, Jiangxi and Guangxi (China), and Transvolga (Russia). This Watch List is based on ISciences Water Security Indicator Model (WSIM) Global Water Monitor and Forecast issued 8 September 2017.
The September Outlook indicates much warmer than normal temperatures - conditions we'd expect to see once in 20 to 40 years - in many regions of the world including India's southern half, coastal West Africa, and the eastern Amazon Basin. Much drier than normal conditions are forecast for central India.
Though a slight reduction in the extent of exceptional deficits is expected, the forecast for the next three months indicates a basic pattern of water conditions similar to observed conditions in the prior three months which includes widespread, intense deficits in most of Brazil north of Rio de Janeiro and surpluses in La Pampa Province, Argentina. In addition, a transition from surplus to deficit is forecast in Brazilian states south of Rio and in eastern Paraguay. After October deficits across northern South America are forecast to shrink considerably.
The August forecast indicates a few areas that will see drier than normal conditions, including northern India from Gujarat through the center of the country; and, along the southern and eastern shores of the Black Sea. But once again it is the temperature forecast that commands attention with vast areas of northern South America and the Middle East forecast to be exceptionally hotter than normal, as well as many other parts of the world with a forecast of warm anomalies of varying severity.
The December 2016 Precipitation & Temperature Outlook indicates that many parts of South Asia, East Asia, and Southeast Asia are forecast to be much warmer than normal. Significant dry anomalies are expected to envelope Sri Lanka. Wet anomalies are forecast for Kazakhstan, northern Mongolia, Myanmar, the Malaysian Peninsula, Western Australia, Cameroon, Equatorial Guinea, Gabon, and Venezuela.
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.
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.