National Weather Service: La Nina is gone

>> in domestic news, a story we may all experience before long. when it comes to the weather, the past year or so has been one for the record books. a terrible drought across a lot of the country. devastating outbreaks of tornadoes, wildfires, and one of the mildest winters in many spots in memory. it was all blamed, so we were told, on a weather phenomenon called lunina, which scientists told us today is now over. the question now is what does it mean for the weather moving forward? does the weather now change? for starters. we get our report from janet shamlian .

>> extreme weather from parched earth in the south due to too little rain to too much of it, punishing tropical storms and hurricanes. much of it set up by conditions of la nina .

>> la nina is gone and is unanticipated to be back anytime soon.

>> it's a climate pattern caused by cooling of the central pacific , triggering krauts in the south and rain further north. last year, a record 14 extreme weather events , each caused more than $1 billion each in the u.s. and la nina had a hand in it. from hurricane irene charging up the eastern seaboard to the tinder box conditions that blanketed much of the south. if it's coming, the relief may be most welcome in texas. last year alo, there were $750 million just in crop losses. the heat was on all over. in march of this year, every state in the nation experienced at least one record warm temperature. this tornado in the dallas area last month, meteorologists are still stying to figure out if la nina played a part in it, but forecasters are saying the end of lunina won't guarantee a better forecast.

>> just because la nina issoever, doesn't mean we're not going to have ambassador weather. there are many bad factors that cause the kind of weather we have seen.

>> as hurricane season approaches, forecasters will be watching to see if la nina 's exit brings a calmer season.