La Nina 2024-25 Calendar. La niña development continues to be “favorable”. The wmo el niño/la niña update is prepared approximately every three months through a collaborative effort between wmo and the international research institute for climate and society (iri) as a contribution to the united.
A weak la niña is expected to develop ahead of the season and influence temperatures, precipitation, and by extension, even snow across the united states. Noaa is predicting a 60% chance for a weak la niña event, developing in the northern hemisphere autumn months.