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.
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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.
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.
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.
Severe to exceptional water deficits will continue to emerge in the South and South Atlantic states through September, with moderate deficits in the Northeast and in the Ohio River Valley, though deficits are expected to diminish somewhat in severity after June. Moderate deficits may emerge on the Arkansas and Colorado Rivers and moderate to severe deficits in northern Colorado from June through September. Exceptional surpluses are forecast to persist in Idaho through June, along with surpluses of varying intensity in the Pacific Northwest and California. After June the extent and severity of these surpluses is forecast to diminish.
Though the extent of exceptional deficits from Missouri to the Gulf and to the Atlantic is expected to recede from March through May, exceptional deficits will persist in Arkansas, Missouri, and western Illinois, and moderate deficits will emerge throughout much of the US east of the Mississippi. Surpluses are forecast for the Pacific Northwest, Idaho, northern Nevada, Central California, western Nevada, and western Colorado and are expected to be exceptional in Idaho, parts of Central California, and along the Columbia River.
Regions likely to have significant water deficits for the 12-month period from December 2016 through November 2017 include: Arkansas, Quebec, Brazil, Finland, Denmark, Libya, Niger, Gabon, Madagascar, Saudi Arabia, Yemen, northern Russia, Inner Mongolia, Thailand, western Cambodia, Papua New Guinea, and eastern Australia. Water surpluses are forecast for: Idaho, Central California, southwestern Zambia, the Okavango Delta in Botswana, northeastern Afghanistan, and between the Irtysh and Yenisei Rivers in Russia. This Watch List is based on ISciences Water Security Indicator Model (WSIM) Global Water Monitor and Forecast issued 8 March 2017.
In the US, water deficits are forecast to persist through February from Pennsylvania and Ohio southward to the Gulf but will diminish in severity thereafter. Much of the far Northeast, with the exception of Vermont, is expected to return to near-normal conditions December through February. Surpluses will continue to emerge in Wisconsin, southern Minnesota, and northern Iowa through February, and Idaho, western Montana, and Washington through May. Moderate deficits will emerge March through May in Maine, southern New Hampshire, Massachusetts, Rhode Island, and Connecticut, and from North Carolina through Florida.
The outlook for the United States indicates widespread exceptional water deficits throughout the Northeast from July through September. Deficits of varying severity are also forecast for parts of the Midwest and Upper Midwest, the Pacific Northwest, and California. Widespread water surpluses are expected in eastern Texas and surpluses are also forecast in West Virginia and Nebraska. After September deficits will diminish with the exception of the Missouri and Yellowstone Rivers. Surpluses in Texas will diminish. Widespread surpluses are forecast to emerge in Wisconsin and across the Mississippi River into Minnesota.
The outlook for the United States indicates widespread and varied water anomalies for much of the country. Water deficits are forecast for much of the Northeast, parts of the Southeast, Upper Midwest, and West, which are expected to be most severe June through August, particularly in the Northeast and West. Water surpluses are forecast for a vast portion of Texas which are also expected to be of greatest extent and exceptional severity through August.