AI Summary

NOAA’s National Weather Service declared in June that El Niño had developed, based on tropical Pacific ocean temperatures that warm before the event reaches the Americas. The warm waters off Southern and Central California are actually from a recent marine heat wave that predates the current El Niño. Much of the Pacific Coast is still experiencing relatively normal conditions while awaiting the impacts of a potentially very strong El Niño. The current warmth along the coast does not yet indicate the arrival of the event.

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