Irrigation pipes sit along a dry irrigation canal near Stockton, Calif. in 2015. La Nina may bring no relief to drought conditions in Southern California, NOAA says. Government weather forecasters said Thursday, Nov. 10, 2016, that La Nina has arrived and may last through the winter. La Nina usually means wetter winters in the northern U.S. and drier conditions in the southern parts including drought-stricken California. (AP Photo