Recent exceptional deficits in Mongolia into Northeast China, on the Korean Peninsula, and in Honshu, Japan are expected to moderate in the near term – August through October – but severe to extreme deficits will continue to emerge in the northeast and moderate deficits will emerge from southern Gansu to the East China Sea. Widespread surpluses are forecast across much of southern China. After October intense deficits in northwestern China will increase in extent, in Xinjiang through Inner Mongolia and Mongolia, and deficits of lesser severity will continue to emerge in the Northeast China and in the North China Plain.
Though a significant retreat of exceptional water surplus in the region is forecast through October, exceptional surpluses remain in the forecast for: western Myanmar; eastern Thailand into southern Laos; and, southeastern Sulawesi and Sumbawa and Flores Islands in Indonesia. Exceptional deficits are forecast for a large block of western Cambodia, and deficits of varying severity are forecast for the Mekong Delta, southern Thailand, Singapore, Malaysian Borneo, southern Sumatra, and pockets in central Papua New Guinea. After October, near-normal conditions are expected in many parts of the region and deficits in western Cambodia will moderate.
The near-term forecast through October indicates that exceptional deficits will nearly disappear in India but moderate to severe deficits will continue to emerge, covering much of the north/south extent of the country. Surpluses are forecast for Gujarat, Jammu and Kashmir, West Bengal, and Mizoram. Deficits are forecast for southern Afghanistan, central and southern Pakistan, and eastern Bhutan. Exceptional surpluses will continue to emerge in much of Bangladesh and central Nepal. Deficits in Sri Lanka will ameliorate, leaving moderate deficits in the east. Beyond October primarily moderate deficits will continue to emerge in central India through April 2018.
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 extent of exceptional water deficits is expected to diminish considerably through October – particularly in the southern half of the continent – but deficits reaching exceptional intensity are forecast from northern Mauritania through northern Sudan, and in Somaliland, Somalia, and eastern Ethiopia. A large block of exceptional surplus is forecast in eastern Tanzania, and some exceptional surplus is also expected in northern Madagascar. Overall, deficits will continue to downgrade through January 2018, while surpluses will increase in Tanzania and will emerge in Malawi, northern Mozambique, eastern Zambia, Uganda, western Kenya, and along the While Nile in South Sudan.
The extent of exceptional water deficits is expected to diminish considerably in the coming months though southern Europe will remain in moderate deficit through April 2018. Some relief is in the near-term forecast, particularly for Italy, Spain, Portugal, and Belgium, as exceptional deficits shrink through October, though Finland will remain in the grip of intense deficits. Surpluses are forecast for western Russia, the border of Romania and Moldova, and a pocket in north-central Germany.
Regions forecast to have significant water deficits for the 12-month period from May 2017 through April 2018 include: Brazil, Belgium, Spain, Italy, Finland, northern Africa, Gabon, Somalia, Saudi Arabia, Turkmenistan, Cambodia, Mongolia, and Tasmania. Water surpluses are forecast for: La Pampa (Argentina), Tanzania, western Russia, Bangladesh, Manipur and Mizoram (India), and eastern Thailand. This Watch List is based on ISciences Water Security Indicator Model (WSIM) Global Water Monitor and Forecast issued 9 August 2017.
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 near-term forecast through September shows a distribution pattern of water anomalies similar to the prior three months with some decrease in intensity. However, surpluses are forecast to increase in the central Gulf Coast. Beyond September water anomalies will continue to become less severe, though pockets of exceptional surplus will persist in Idaho and its neighbors. The forecast through March 2018 indicates the emergence of primarily moderate surpluses in many parts of the country.
Exceptional water surpluses in southern Ontario west of Toronto are forecast to persist through September, as are exceptional deficits in eastern Ontario and central Quebec. After September moderate drought conditions are expected to persist in northwest Ontario, northern Manitoba, and northern British Columbia. Recent exceptional surplus conditions in Manitoba west of Lake Winnipeg, and in northwestern Saskatchewan into Alberta are expected to continue throughout the forecast period into early 2018.