During a La Niña event, the northern U.S. and Canada typically experience colder and wetter winters, while the southern U.S. becomes warmer and drier, according to the National Oceanic and Atmospheric Administration (NOAA) . La Niña also tends to increase hurricane activity over the Atlantic.
However, the current La Niña arrived later than expected and didn't have time to gain strength before winter started. The conditions for this "unusual" La Niña appeared in December and are likely to persist through to April, NOAA said in a statement.
I believe La Niña plays a crucial role in altering the any recent heat cycle that the Earth has witnessed. The climate scientist don't want to accept it as of now because most of them believed that the higher temperatures were not the result of El Niño, counterpart of El Niña.