The forecast through December indicates that intense water deficits which have dominated much of Australia in prior months will retreat from most regions except the southeast. Deficits will be exceptional in Tasmania, and severe to exceptional along the southeast coast from Adelaide through Victoria and past Canberra. Moderate to severe deficits are forecast for New Zealand. Deficits in New Caledonia will moderate.
The forecast through December indicates many areas of water surplus including Iowa and surrounding states, the Ohio River Basin, eastern Pennsylvania, and Texas. Surpluses will be intense in Iowa and Pennsylvania. Deficits are expected in the Southeast, primarily moderate but more intense in Florida surrounding Lake Okeechobee. Intense deficits are also forecast along the Arkansas River, and in Colorado, and north-central Utah. Other areas of deficits include the Canadian River, the Rio Grande through New Mexico, and Maine.
Regions forecast to have significant water deficits for the 12-month period from July 2018 through June 2019 include: Germany, Finland, southern Iraq, western Cambodia, Mato Grosso and São Paulo (Brazil), Karachi (Pakistan), and southeastern Australia. Areas with a forecast of significant water surplus include: Pennsylvania and Iowa (US), Uruguay, Myanmar, Vietnam, and Heilongjiang (China). This Watch List is based on ISciences Water Security Indicator Model (WSIM) run on 11 October 2018.
Warmer than normal temperatures are forecast for a vast stretch of Russia east of the Ural Mountains, through the Central Siberian Plateau and leading south to the Sea of Japan, where anomalies will be intense. Similar conditions are expected across the border in China’s Northeastern Plain. The US Southwest can expect much wetter than normal conditions.
The forecast through November indicates that water deficits will downgrade considerably overall leaving mild to moderate deficits, but deficits will be intense along the Arkansas River through Kansas and Colorado, western Colorado, northeastern Utah, along the Canadian River through Oklahoma and the Texas Panhandle, and in the US Northeast. Areas of surplus include: Montana, the Black Hills of South Dakota, northern Nebraska, Iowa, Wisconsin, and eastern Pennsylvania.
The forecast through November indicates extreme to exceptional water deficits in the north from southeastern Algeria to the Red Sea, and deficits nearly as intense for western Ethiopia, the Atbara River, the Blue and White Nile Rivers, and the intersection of Central African Republic, Democratic Republic of the Congo, and South Sudan. Deficits may be severe on the Kafue River in Zambia. Scattered surpluses are forecast around West Africa and intense surpluses in Tanzania.
The forecast through November indicates that water deficits will downgrade considerably in Turkmenistan, Uzbekistan, western Kazakhstan, and the North Caucasus region. Moderate deficits are forecast for northwestern Kazakhstan and across the border well into southern Russia, but deficits may be severe along the Ural River. Surpluses are forecast in the eastern and southern Ob River watershed of Russia, northern and eastern Kazakhstan, and eastern Kyrgyzstan.
Though water deficits in the region are expected to diminish and downgrade, the forecast through November indicates severe to exceptional deficits for Mexico’s northern Baja Peninsula and in states along the southern Gulf and across to the Pacific. Primarily moderate deficits are forecast for northern Central America and surpluses are expected in Costa Rica. Extreme deficits are forecast eastern Jamaica.
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.
Through November extreme to exceptional deficits will dominate much of Saudi Arabia, southern and western Iraq, Kuwait, large pockets of southern Iran, Qatar, and United Arab Emirates. Primarily moderate deficits are forecast for the Levant. Deficits of varying intensity are forecast for much of Turkey and will be severe in central Turkey, along its northeastern coast, and through Georgia.