http://www.bom.gov.au/climate/enso/

La Niña conditions have undergone little change over the past
fortnight, with most atmospheric and oceanic indicators remaining at, or just
exceeding, La Niña thresholds. Climate models surveyed by the Bureau suggest
this event is likely to peak near the end of the year and persist into early
2012. Current observations of this La Niña show that it is considerably weaker
than the very strong 2010-11 event.

See latest updates at the URL above.

http://thinkprogress.org/romm/2011/12/03/381466/wmo-2011-is-warmest-la-nina-year-on-record-science-human-activities/

Global climate in 2011 was heavily influenced by the strong La
Niña event which developed in the tropical Pacific in the second half of 2010
and continued until May 2011. It was one of the strongest of the last 60 years
and was closely associated with the drought in east Africa, islands in the
central equatorial Pacific and the southern United States, and flooding in
southern Africa, eastern Australia and southern Asia.

Strong La Niña years are typically 0.10 to 0.15°C cooler than the years
preceding and following them. 2011’s global temperatures followed this pattern,
being lower than those of 2010, but were still considerably warmer than the most
recent moderate to strong La Niña years, 2008 (+0.36°C), 2000 (+0.27°C) and 1989
(+0.12°C). Weak La Niña conditions have redeveloped in recent weeks but have not
yet approached the intensity of those in late 2010 and early 2011.