"During the winter of an El Nino event, the air temperature tends to be warm over most of Canada, with the greatest warming centred around Manitoba-western Ontario, where a temperature anomaly of up to +3 degrees Celcius (averaged over the last nine El Nino events) can be found. Southern Canada also tends to be drier during an El Nino winter. Southern British Columbia tends to receive less snow.
In the case of the cold La Nina event-- the opposite of the warm El Nino event-- the coastal waters off British Columbia tend to be cool. In a La Nina winter, the Canadian air temperature (especially west of Quebec) tends to be below normal; Shabbar and Khandekar, 1996), while the precipitation in southern Canada tends to be above normal. Southern British Columbia tends to receive more snow."
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