El Niño winter patternThe developments in the El Niño region can affect the winter storm track. La Niña shift to El NiñoThis graphic shows the rapid changes in the Equatorial Pacific (El Niño Region). El Niño i ExpandThis animation shows the changing conditions in Tropical Pacific this year, with La Niña fading and El Niño emerging. El Niño regionThe El Niño region is not adjacent to the Bay Area coast. El Niño intensity scaleThere is an intensity scale for El Niños: Weak, Moderate, Strong, Very Strong.