Widespread water deficits are forecast in much of the eastern half of the US through December and may be exceptional in the Virginias and Pennsylvania. Moderate to exceptional surpluses are predicted in central Minnesota. Surpluses will continue to emerge in northwestern Wisconsin, the western Upper Peninsula of Michigan, Florida, and Idaho and its neighbors. After December deficits in the East are expected to diminish, but intense deficits will persist in the Carolinas and southern Louisiana. Intense surpluses will continue to emerge in much of Minnesota.
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Regions forecast to have significant water deficits for the 12-month period from July 2017 through June 2018 include: Amapá (Brazil), Estonia, Ukraine, Turkey, Syria, Jordan, Madhya Pradesh (India), western Cambodia, and Tasmania (Australia). Water surpluses are forecast for: Tripura, Mizoram, and Manipur (India), western Myanmar, the Upper and Middle Yangtze River (China), and the Upper Ob River and Tom River Basins and the Transvolga Region (Russia). This Watch List is based on ISciences Water Security Indicator Model (WSIM) Global Water Monitor and Forecast issued 9 October 2017.
Exceptional water surpluses are forecast in southeastern Texas through November along with surpluses of lesser severity along the Gulf. Exceptional deficits in the Northern Plains States will moderate. In the West, surpluses are forecast in Idaho, nearby areas of surrounding states, and pockets of central California. Deficits are expected in: northern Colorado, Kansas, Iowa, northeastern and southernmost Texas, southern Michigan, northwestern Pennsylvania, northern Maine, southern West Virginia, and the Southeast. After November moderate surpluses are forecast for the Ohio River Valley.
The overall outlook for much of the United States indicates only moderate water anomalies for much of the country. However the forecast for May through July includes the emergence of some severe deficits in the Northeast, along the East Coast, and in the Upper Midwest which will persist through October. Exceptional water deficits will also persist in much of southern California and southwestern Arizona. Severe to exceptional surpluses are forecast in northeastern Nevada and across the border into Idaho, eastern Texas, parts of Nebraska, scattered pockets in the Northwest, south-central Alaska, and the western half of the island of Hawaii.