The forecast through July indicates widespread water surpluses of varying intensity a vast area on either side of the Mississippi River. Exceptional anomalies are forecast around Sioux Falls, and along the Mississippi River on either side of Memphis and from Louisiana to the Gulf. Surpluses will increase in the Rockies and shrink slightly and moderate in California. In the Pacific Northwest, deficits will shrink in Washington; Oregon will transition from deficit to moderate surplus.
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Most notable in the forecast through May is the absence of widespread, intense water surpluses observed in the East in prior months and the emergence of surpluses in the West. Surpluses will shrink and downgrade in the center of the country but remain widespread in a broad path from southern Minnesota to the Gulf of Mexico and will be intense in Kansas. Moderate surpluses will cover much of California, and many Rocky Mountain States will transition from deficit to surplus.
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 September indicates that, while exceptional water deficits will diminish overall and in the Southwest and Southern Rockies in particular, moderate to severe deficits are expected in a wide path from Missouri to the Gulf. Deficits may be intense in Louisiana, along the Arkansas and Canadian Rivers, and the Pacific Northwest coast. In the Northeast, deficits will persist and spread further in Maine. Significant surpluses will persist in the Northern Rockies, and surpluses will emerge in much of Florida.
The forecast through August indicates deficits in the Northeast, which could be exceptional in southern Maine. Moderate to severe surpluses are forecast scattered from Virginia through Alabama, and covering nearly all of Florida. Primarily moderate deficits are forecast for the Mississippi River Basin. Intense deficits are forecast for western Colorado, northern Utah, western Oregon, western Washington, and southernmost Texas. Primarily moderate deficits are expected in California. Surpluses will diminish in Idaho and downgrade slightly from exceptional in Montana.
Regions forecast to have significant water deficits for the 12-month period from March 2018 through February 2019 include: southern Mexico, northern Brazil, North Africa, Europe, Afghanistan, and Southeast China. Areas with a forecast of significant water surplus include: Montana and Idaho (US), Tanzania, Kenya, Uganda, Spain, and Bangladesh. This Watch List is based on ISciences Water Security Indicator Model (WSIM) run on 7 June 2018.
Regions forecast to have significant water deficits for the 12-month period from February 2018 through January 2019 include: Brazil, southern Venezuela, Libya, Egypt, Gabon, Finland, Saudi Arabia, and Afghanistan. Areas with a forecast of significant water surplus include: Idaho and western Montana (US), southeastern British Columbia (Canada), Tanzania, Kenya, Spain, Hungary, southern Romania, and eastern Ukraine. This Watch List is based on ISciences Water Security Indicator Model (WSIM) run on 9 May 2018.
Regions forecast to have significant water deficits for the 12-month period from January 2018 through December 2018 include: the US Southwest, Brazil, southern Venezuela, northern Africa, Gabon, Zambia, Finland, Saudi Arabia, Iraq, Iran, and Afghanistan. Areas with a forecast of significant water surplus include: Idaho, southern British Columbia, Tanzania, Hungary, southern Romania, and Ukraine. This Watch List is based on ISciences Water Security Indicator Model (WSIM) run on 10 April 2018.
Water surpluses will continue to emerge in southern Michigan and the Ohio River Valley. Exceptional surplus is expected on the Missouri River, western Montana, Idaho, and Washington. Intense deficits will continue in the West and Southwest. Moderate deficits are forecast for Oregon, Kansas, western Oklahoma, and most of Texas west of the Brazos River, with severe conditions in the Panhandle. Missouri, Arkansas, Louisiana, and Mississippi will transition out of deficit, with moderate surplus emerging in Arkansas into surrounding states. Deficits in the Mid-Atlantic States will shrink.
Regions forecast to have significant water deficits for the 12-month period from December 2017 through November 2018 include: the US West, Southwest, and South Atlantic States; southern Venezuela; Uruguay; northeastern Argentina; Finland; northern Africa and Gabon; and southern Iraq. Areas with a forecast of significant water surplus include: the Ohio River Valley and western Montana (US); Paraguay; Tanzania and Ethiopia; Ireland; Central and Eastern Europe; and European Russia. This Watch List is based on ISciences Water Security Indicator Model (WSIM) run on 7 March 2018.