After a long wait, La Niña conditions developed in December. What makes this La Niña unusual?
Officially, the ocean is lagging, but the tropical atmosphere is already looking La Niña-like.

Big things sometimes come in small packages, and our blogger explains why this winter’s expected weak La Niña might have a bigger precipitation impact than usual.
The expected La Niña has been slow to develop. There's still a 57% chance it will emerge soon, and the atmosphere is already looking a bit like La Niña. Our blogger discusses some of the climate conditions at work in the tropical Pacific.
Is there any pattern to U.S. snowfall during La Niña winters? Based on past years, our blogger tells us where you're likely to need your shovel.
There's a 60% chance that La Niña will develop soon, but it's likely to be a weak event.
Our guest blogger uses basketball betting pool simulations to show how to come out ahead even if you only know the percent chance of a particular outcome.
There have been plenty of episodes in this season's La Niña Watch. Our blogger recaps what's happened so far and what we can expect in the upcoming months.
La Niña conditions are likely for later this year. What could that mean for drought in the Southwest?
The dog days of summer have slowed down La Niña's arrival, but odds are still high for an event by fall.