El Niño will probably develop as a weak event in late summer or early fall in the Northern Hemisphere, according to MDA Weather Services, while Commodity Weather Group LLC said it may be delayed for several months as the warming of the Pacific Ocean slows. A drier pattern in Southeast Asia and eastern Australia, and lower monsoon rainfall in India are signs of an El Niño -like event, Donald Keeney, an MDA meteorologist, said from Gaithersburg, Maryland.