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.
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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.
In the next few months water deficits in Baja, Mexico will remain intense, with exceptional deficits emerging in the south. Extreme to exceptional deficits are also forecast for Sonora, Sinaloa, Durango, Nayarit, along with deficits slightly less severe in Chihuahua. Surpluses of varying severity will continue to emerge in pockets of southern Mexico leading into northern Guatemala and Belize, where conditions may be extreme. Severe to exceptional surplus is forecast for Honduras, Nicaragua, Costa Rica, and Jamaica.
Exceptional water deficits are expected to nearly disappear in Mexico April through June, with moderate deficits persisting in Chiapas and Tabasco. Severe to exceptional deficits are forecast to emerge in the Baja Peninsula and Sonora and moderate deficits will emerge in Guatemala. From July through September moderate to extreme deficits are forecast to re-emerge in southern Mexico, persist in northern Baja, and emerge in Guatemala, El Salvador, western Honduras, western Nicaragua, northern Costa Rica, and Jamaica.
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.
Mexico, Central America, & the Caribbean: Water deficits forecast for southern Mexico, surpluses in Nicaragua
Water deficits of varying severity are forecast throughout much of Mexico from November through January, with pockets of exceptional deficit in Oaxaca. Deficits will persist in Guatemala, and surpluses are forecast in eastern Honduras, Nicaragua, and northern Costa Rica. From February through April deficits in across northern Mexico will diminish, but moderate to exceptional deficits will persist in the southern states of Michoacán, Guerrero, Oaxaca, and parts of the Yucatán. Surpluses will persist in parts of Honduras and Nicaragua.
The October Outlook indicates a large expanse of exceptionally warmer than normal temperatures forecast from Quebec into Newfoundland and Labrador, Canada, and coastal West Africa, along with widespread significant warm anomalies in Western Europe, Russia, and Southeast Asia. Exceptional dry anomalies are forecast for Guinea-Bissau and western Guinea. Areas with a forecast of wet anomalies include Colombia, Peru, Gabon, Java, and northern Australia.
Deficits on the Baja Peninsula are forecast through October, with some abatement in August. Deficits will continue to emerge in southern Mexico through April. Surpluses are expected in northeastern Sonora, Mexico, northern Costa Rica, and eastern Panama through October. Deficits are forecast to emerge in Haiti. From November on moderate deficits will continue to emerge in southern Mexico, Guatemala, and El Salvador.
The August forecast indicates widespread severe to exceptional warm anomalies across vast stretches of northern South America, North Africa, Saudi Arabia, and Southeast Asia, with anomalies of lesser severity in many other parts of the world. Scattered precipitation anomalies include dry anomalies in Nepal and in Amapá, Brazil. Wet anomalies are predicted for the island of New Guinea, eastern Kyrgyzstan, China's Taklamakan Desert, Arizona, and Sonora.
Water deficits are forecast to persist on the Baja Peninsula through September with greatest extent and severity in July. Deficits are forecast in southern Mexico during this period and are expected to be of exceptional severity along the southern Gulf of Mexico in Veracruz, Tabasco, and Oaxaca. Deficits are also forecast in Guatemala and El Salvador, Jamaica and Haiti, and after September may emerge in Belize, Honduras, western Nicaragua and eastern Panama.