21.   I have heard of localized weather phenomena.

22.   In the natural weather phenomenon known as La Nina, sea-surface temperatures in the eastern tropical Pacific are cooler than normal.

23.   In this weather phenomenon, the pool of ocean water cools below normal, a change that also affects air patterns but is less well understood.

24.   La Nina is a weather phenomenon caused by abnormal cooling of the Pacific.

25.   Last summer, the weather phenomenon was credited with protecting Florida during the hurricane season by forcing storms away and preventing them from developing.

26.   Locals are calling this winter one of the mildest in years, tempered in part by the El Nino weather phenomenon, according to meteorologists.

27.   Meteorologists say the conditions are part of a normal summer weather phenomenon in Southern California caused by moisture-laden clouds blowing north from Mexico.

28.   Mexican farmers clearing land for planting started the fires, which spread out of control because of severe drought conditions blamed on the weather phenomenon known as El Nino.

29.   Nonetheless, the weather phenomenon could have a cumulative negative impact this year.

30.   Next year, Atwood said, the weather phenomenon could present reverse weather patterns, causing flooding in Mexico and other regions hit by drought and fire this year.