Right now it looks like a repeat of last year as a La Niña is developing along the equator over the Pacific from the coast of South America to 180° longitude. The video below explains it.
La Niña is a global sloshing of pressure systems that results in colder than normal water along the equator from South America to the center of the ocean at 180° longitude. The cold water affects the jet stream systems over the U.S. during winter and there fore the weather. The opposite pattern is the better known El Niño which occurs when water temperature is warmer than normal.
The warmer or colder than normal the water temperature is - the stronger the system and the greater the effects around the globe. In Cincinnati and the surrounding area La Niña causes a bull's eye of wet weather right over us and puts us in the battle ground between constant cold and persistent warmth.
The maps below are from NOAA's Climate Prediction Center, the official forecast.
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