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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The forecast through June indicates that surpluses East of the Mississippi will nearly disappear. Moderate deficits are forecast for the South Atlantic States and parts of the Deep South. Surpluses are forecast in the center of the country radiating from Nebraska and Iowa and will emerge in the Rockies with intense anomalies in many places, particularly Colorado. Primarily moderate surpluses are forecast for nearly all of California as well as northern Arizona and much of Oregon.
Regions forecast to have significant water deficits for the 12-month period from January 2019 through December 2019 include: French Guiana, Brazil, Finland, Latvia, Egypt, Somalia, Angola, and United Arab Emirates. Areas with a forecast of significant water surplus include: northern Iraq, western Iran, Afghanistan, Tanzania, and southeastern China. This Watch List is based on ISciences Water Security Indicator Model (WSIM) run on 10 April 2019.
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.
Though exceptional water surpluses will diminish through March, widespread and intense conditions will persist from Wisconsin through southern Minnesota, Iowa, eastern Nebraska, eastern Kansas, central Oklahoma, and central and eastern Texas. Surpluses along the Eastern Seaboard will also persist but moderate, while conditions in the Ohio River Valley normalize. In the western US, mild deficits are forecast punctuated by pockets of more intense anomalies, deficits as well as surpluses.
Through February, widespread intense water surpluses will persist in the center of the country and in the east. Surpluses will cut a broad path from Michigan’s Upper Peninsula, passing through Iowa and reaching the eastern half of Texas. Surpluses are also forecast for the northern Ohio River Basin and in the east from southern New York through Florida’s Panhandle, and will be extreme in eastern Pennsylvania. Areas of deficit include: northern New York, northern Maine, southern Florida, northwestern Wyoming, Colorado, and western Oregon.
Regions forecast to have significant water deficits for the 12-month period from September 2018 through August 2019 include: Quebec (Canada), Chile, Finland, Albania, northern Africa, India, western Cambodia, and southeastern Australia. Areas with a forecast of significant water surplus include: Texas and Pennsylvania (US), Paraguay, western Tanzania, Tomsk and Kemerovo (Russia), and Heilongjiang (China). This Watch List is based on ISciences Water Security Indicator Model (WSIM) run on 7 December 2018.
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.
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.
For the next several months, water deficits will diminish overall but intense deficits are forecast for southern California, the Willamette Valley in Oregon, along the Arkansas River, and western Colorado. Areas of moderate deficit include northern Minnesota and from Missouri to the Gulf. Surpluses are forecast for northern Nebraska, the Black Hills of South Dakota, southern Montana, the Pecos River in New Mexico into Texas, eastern Pennsylvania, Maryland, northern Virginia, coastal North Carolina, and much of Florida from Jacksonville past Lake Kissimmee.