From May through July moderate to severe water deficits are forecast to emerge in eastern Myanmar and western Thailand. Exceptional deficits in Papua New Guinea will downgrade but severe to extreme deficits will persist and emerge farther west into Papua, Indonesia. Moderate deficits are forecast to emerge in the western two-thirds of Indonesian Borneo. Surpluses reaching exceptional severity will persist in Sumbawa and Flores Islands, Indonesia, and moderate surpluses are forecast for northeastern Borneo and southern Philippines. After July deficits in the region will downgrade and surpluses will nearly disappear.
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Southeast Asia & Pacific
From April through June water deficits are forecast to emerge on Java, southern Sumatra, and southern Borneo, but will recede in Cambodia except for a pocket of exceptional deficits northeast of Tonlé Sap. Surpluses are forecast for central Vietnam, the Malay Peninsula, northern Sumatra, northeast Borneo, and Mindanao. After June, deficits are forecast for most of the region, with severe to exceptional deficits in Malaysia, Indonesia, Papua New Guinea, and eastern Mindanao.
Southeast Asia & the Pacific: Water deficits forecast for Thailand, western Cambodia, Papua New Guinea
For the next three months severe to exceptional water deficits are forecast to persist in Cambodia, particularly in the west, and severe to extreme deficits will emerge throughout much of Thailand. Deficits are also forecast for southern Myanmar and Papua New Guinea. Both deficits and surpluses are forecast in Laos during this period and in Vietnam, though surpluses will dominate Vietnam’s central coast. After May deficits of varying intensity are forecast for much of the region and are expected to be of greatest severity in Papua New Guinea and Indonesian Borneo.
The forecast through April indicates the beginning of a transition from water surplus to deficit, after which deficits of varying intensity will prevail. Through April surpluses are forecast for Vietnam, the Malay Peninsula, the Philippines, and North Sumatra, Indonesia. Exceptional deficits will persist in Cambodia, while Thailand can expect deficits in the north and surpluses in the south. Java is expected to transition from surplus to deficit. Deficits will emerge in central Borneo and will persist in Papua New Guinea. After April deficits are forecast for most of the region, and may be more severe and widespread in Malaysia, Indonesia, and Papua New Guinea.
Water surpluses are forecast for Laos, central Vietnam, and the Malay Peninsula through March. Exceptional deficits will persist in Cambodia near Tonlé Sap Lake during this period. After March, a transition to water deficits in parts of Malaysia, Indonesia, and Papua New Guinea is forecast, and deficits will continue to emerge through September.
Though water surpluses are forecast for many parts of the region through February, exceptional deficits will persist in Cambodia through May. Exceptional surpluses are forecast to persist through February in Laos and in central Vietnam through May. Surpluses of lesser severity are forecast for the next three months in the southern Malay Peninsula, Java, southern Vietnam, and Gorontalo, Indonesia.
Though water surpluses are forecast for many parts of the region through January, exceptional deficits will persist in Cambodia through April. Surpluses are forecast through January in Laos, southern Vietnam, Java, Flores Island, eastern Borneo, Mindanao, and western Luzon, which may be exceptional in some areas. With the exception of the Philippines, many parts of the region will transition to water deficits from February through April.
Though water surpluses are forecast for many parts of the region through December, exceptional deficits will persist in Cambodia and in southern Thailand along the Gulf of Thailand. Exceptional surpluses are forecast in northern and southern Laos; Java; Gorontalo Province in central Sulawesi Island, Indonesia; and western Flores Island. After December much of Southeast Asia, Malaysia, and parts of Indonesia will transition to deficit.
Exceptional water deficits are forecast to persist in Cambodia through May. From September through November deficits will continue to emerge in Thailand and the eastern half of Luzon, Philippines. Surpluses are forecast in Laos, western Flores Island, Vietnam, Sumatra, Java, North Kalimantan, West Papua, and northern Luzon. By December, however, much of the region will begin to transition to water deficits of varying severity which will persist through May.
Thailand, Laos, Cambodia, and the Malay Peninsula are forecast to continue in conditions of water deficit, which will be especially severe in Cambodia. Surpluses in western Borneo will diminish by September while surpluses on Java, and Flores Island may persist longer. From November on, deficits will increase in extent and severity on the Malay Peninsula and Sumatra, and will emerge in northeastern Borneo.