Climate Trends and Variations Bulletin for Canada

Autumn 1998

Regional Analysis

All regions across Canada, but one, experienced above-normal temperature anomalies for autumn 1998. As summarized in the regional temperature departures: trends, extremes and current season rankings table, the temperatures ranged from 0.2°C below average for North British Columbia Mountains/Yukon Region to 4.6°C above normal for the Arctic Tundra Region. The Arctic Tundra and the Arctic Mountains and Fiords (+3.9°C) Regions experienced their warmest autumn in the 51-year period examined. Seven of the 11 regions ranked in the top ten warmest autumns, as shown in the regional temperature departures: warmest ten years table. None of the regions made it to the top ten coolest list, tallied in the regional temperature departures: coolest ten years table. The complete 51-year period is presented in the regional temperature departures: ranked from warmest to coolest table.

Most of the regions show a slightly negative trend for the historic record. However all of the trends are less than one degree, positive or negative over the 51-year period. An 11-month regional summary follows the Regional precipitation summary.

Arctic Mountains and Fiords Region had it's driest autumn on record, at 52.4% below normal. Three other regions made it to the top ten driest list, as is shown in the regional precipitation departures: driest ten years table. Only the Arctic Tundra (+29.3) Region made it to the regional precipitation departures: wettest ten years table, in 6th place. The wettest and driest years are summarized in the regional precipitation departures: extremes and current rankings table. And all the regional autumn rankings are listed in the regional precipitation departures: ranked from wettest to driest table.

11-Month Summary

Regionally, the first 11-months have set records in 5 regions. The regional temperature departures: trends, extremes and current season rankings table shows all of the regions but the North British Columbia Mountains/Yukon Region are in the top 3 warmest 11-month periods. In all but the Atlantic Canada Region and the Great Lakes/St, Lawrence Lowlands Region, the linear trend is positive for the 51-year period.

January to November 1998 has set drier than normal records in two regions; Northwestern Forest (-23.8%) and North British Columbia Mountains/Yukon (-35.6%). The regional precipitation departures: extremes and current rankings table shows that another two more regions had top ten driest 11-month periods.

See what Environment Canada forecasts for the coming seasons.
More information on La Niña can be found at the Canadian La Niña Bulletin.
Visit Environment Canada's Global Climate Change Website.
Other summarized climate information can be found at the Canadian Institute for Climate Studies.
The American's National Climate Data Center publishes a similar bulletin for the US and the Globe in Climate Perspectives report.

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