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The Hamilton Spectator
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Wednesday December 19, 2007
The weather phenomenon La Nina will bring Canada the coldest winter in nearly 15 years, Environment Canada warned Friday.

Environment Canada's temperature forecast shows the majority of the country will experience a "temperature anomaly" of below-normal temperatures through the months of December, January and February.

Much of Nova Scotia, Saskatchewan, Alberta and parts of British Columbia and southern Ontario will also see above-normal precipitation.

David Phillips, senior climatologist with Environment Canada, told The Canadian Press that the temperature and precipitation abnormalities are likely the result of the weather phenomenon La Nina.

La Nina, meaning the little girl, is the appearance of cooler-than-normal waters in the eastern and central Pacific Ocean.

"La Nina is thought to occur due to increases in the strength of the normal patterns of trade wind circulation," Environment Canada's website says.

"For reasons not yet fully understood, periodically these trade winds are strengthened, increasing the amount of cooler water."

These cooler waters result in wetter-than-normal conditions in the northern hemisphere and changes to the jet stream over North America. Source...

Coldest winter in years, Environment Canada warns
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