Are you dreaming of a wet winter to turn Kings County’s fallowed fields green and end the drought? Prepare for disappointment. Forecasters are calling for a weak La Nina to last into the spring. That usually means dry conditions in Central California. La Nina refers to cooler sea water surface temperatures in the Pacific Ocean. Scott Borgioli, a meteorologist at www.WeatherAg.com, estimated a 75 percent probability that Central California will have below-average precipitation during the upcoming rainy season. Borgioli said that seven of the 11 weak La Nina episodes since 1950 have produced below-average precipitation.