El Niño/La Niña Update (July 2007)

A La Niña event could, more likely than not, develop in the second half of 2007. 

The last WMO El Niño/La Niña Update in March 2007 also noted an enhanced 

likelihood of La Niña development, and conditions were moving quite rapidly in 

that direction until a reversal occurred during May and early June. There 

remains considerable uncertainty over the timing and magnitude of further 

cooling in the central and eastern Equatorial Pacific, and indeed there is a 

possibility that basin-wide conditions, despite some cooling, will on balance 

remain neutral through the remainder of 2007. Development of El Niño during 

the period is considered very unlikely.