Most models (19/23) are predicting La Nina conditions developing over
the Austral winter, but 40% of the models are going for a fairly quick
return to ENSO neutral conditions by the Boreal winter. A typical
sharp change in tha ENSO state, followed by a fairly short-lived, no
more than moderate La Nina is the current model consensus. It will be
very interesting to see how far global temperatures dip towards
Christmas.

•ENSO-neutral conditions are present across the equatorial Pacific.
•Sea surface temperatures continue to decrease across much of the
Pacific Ocean.
•Conditions are favorable for a transition to La Niña conditions
during June-August 2010.

http://www.cpc.ncep.noaa.gov/product...-fcsts-web.pdf

On Jul 6, 3:34*pm, Dawlish wrote:
Most models (19/23) are predicting La Nina conditions developing over
the Austral winter, but 40% of the models are going for a fairly quick
return to ENSO neutral conditions by the Boreal winter. A typical
sharp change in tha ENSO state, followed by a fairly short-lived, no
more than moderate La Nina is the current model consensus. It will be
very interesting to see how far global temperatures dip towards
Christmas.

•ENSO-neutral conditions are present across the equatorial Pacific.
•Sea surface temperatures continue to decrease across much of the
Pacific Ocean.
•Conditions are favorable for a transition to La Niña conditions
during June-August 2010.

http://www.cpc.ncep.noaa.gov/product...ng/lanina/enso...

A "wrap-up" from the Aussie BOM too:

"Trend towards La Niña continues.
Issued on Wednesday 7 July 2010 | Product Code IDCKGEWWOO

Sea surface temperatures in the central equatorial Pacific have
continued to cool over the past fortnight, and hence the tropical
Pacific is now generally cooler than average east of the date-line.
Below the surface, temperatures also remain significantly cooler than
average, with some areas more than 4°C cooler than normal. Trade winds
in the western Pacific remain stronger than normal and cloudiness near
the date-line continues to be suppressed. These indicators, together
with the Southern Oscillation Index (SOI), which has been positive
since April, are consistent with the developing stages of a La Niña
event.

The majority of climate models surveyed by the Bureau suggest current
patterns and trends will continue, with a significant likelihood of
further ocean cooling beyond La Niña thresholds before the end of the
southern winter.

Historically, about 35 to 40% of El Niño events (such as occurred in
2009/10) are followed by a La Niña within the same year. The
combination of current trends and model outlooks suggest the chance of
a La Niña in 2010 is now clearly more likely than not."

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