(AP Newswire) Climate experts confirm La Nina ATLANTA (AP) - Move over, groundhog! Climate experts say they have a better prognosticator in La Nina (NEEN'-yuh). Scientists say a mild cooling of Pacific Ocean waters could coincide with stronger and more numerous hurricanes this year. La Nina often signals a wetter-than-average Pacific Northwest and a drier South as well. The National Oceanic and Atmospheric Administration says La Nina will probably be around through late spring and possibly into the summer. Forecaster Mike Halpert confirms changes in the jet stream and lower-than-normal water temperatures are clues that La Nina already is at work, keeping much of the country warmer than usual last month. Because the agency has only about 50 years of data on La Nina occurrences, it's too early to predict the ultimate effects. Although more strong hurricane activity is expected in the Atlantic.