Long-lasting La Nina conditions in the Tropical Pacific appear to be coming to an end.

Recently, La Nina conditions have been in the weak category, and warming temperatures brought conditions to near the threshold of negative neutral conditions during February.

Nearly all forecast models show continued warming into the spring and summer as the end of this La Nina nears, followed by a shift to El Nino further into the year. There are some differences among the models on the pace of the warming and on...