Waves pound the shore at Peggy’s Cove, N.S. on Jan. 5, 2018. (Andrew Vaughan/The Canadian Press)

Insurers say Canadian weather getting hotter, wetter and weirder

Average number of days with heavy rain or snow across Canada has been outside norm since spring 2013

If it seems as if the weather’s getting weirder, you’re not wrong.

An index of extreme weather in Canada compiled by the insurance industry backs that up.

“Yes, we see definite trends that can’t be explained by normal variability,” said Caterina Lindman of the Canadian Institute of Actuaries.

The institute compiles what it calls the Actuaries Climate Index, a joint effort by insurance organizations across North America. It recently released its latest quarterly update — up to spring 2017.

The index begins with a 30-year average taken from 1961 to 1990 of everyday weather conditions such as temperature, precipitation, wind speed and sea level. Thresholds are set for each of those based on the top 10 per cent of readings.

For an average month, for example, about three days would be in that 10 per cent.

READ MORE: Canadian weather in 2017 saw ‘too much’ of everything

READ MORE: If 2017 weather was a downer, you ain’t seen nothing yet

Using data provided by the U.S. National Oceanic and Atmospheric Administration — one of the top American government science organizations — the index then counts how many days actually exceed that threshold. The index plots the results for every three-month period since 2016.

The method reveals a slow, gradual increase in extreme weather.

The overall Canadian index indicates that during the entire three decades between 1961 and 1990, extreme weather fell outside the range of normal variability only five times. In the last 10 years, however, that happened 12 times.

Temperatures have been climbing.

Across Canada, hot days have exceeded the normal number every quarter since the winter of 2015. The number of cold days hasn’t exceeded normal for nine years.

It’s getting wetter, too. Across Canada, the average number of days with heavy rain or snow has been outside the norm since spring 2013. In Ontario and Quebec, it’s been since winter 2008.

It’s harder to draw conclusions about wind for Canada as a whole. Likewise for sea level — unless you live in the Maritimes, where sea level has been higher than the normal range for the last 12 years.

The findings correspond with data from Environment Canada, which suggests average summer temperatures have climbed one degree since 1970 and precipitation has increased about five per cent.

Actuaries use the information in their calculation of risk as they insure lives and property, said Lindman. But they also do it to contribute to public debate.

“There’s a lot of political angst around the issue of global warming and we’re trying to be neutral sources,” she said. ”We’re just adding our voice.

“We’re in it for the long haul, so we are concerned for the sustainability of our planet.”

Bob Weber, The Canadian Press

Just Posted

DW Poppy Sr. boys basketball defeats ACSS Totems rivals

DW Poppy’s Sr. boys RedHawks defeated ACSS Totems this Friday in a high-stakes basketball match.

VIDEO: All ages participate in Langley Hospice Historic Half marathon

Turnout was down, slightly, this year but donations are up

VIDEO: Vancouver Giants blank Rockets

Langley-based G-men take over top spot in the west

Langley Township goes high tech to spotlight local history

To mark the start of History Week, the Township has put out a new app all about the community.

Kodiaks begin best-of-seven series strong

The Kodiaks opened their quarter-final playoff series by defeating the Delta Ice Hawks on home ice.

VIDEO: Langley hosting high-flying fun at annual gymnastics tournament

Action runs Friday through Sunday at the Langley Events Centre fieldhouse.

B.C. athlete takes home gold in freestyle aerials at Canada Games

Brayden Kuroda won the event with a combined score of 121.65.

Pedestrian in serious condition after hit by car downtown Abbotsford

A youth was also hit, suffered minor injuries, police say

Cabinet likely to extend deadline to reconsider Trans Mountain pipeline

The can’t decide the pipeline’s fate until a new round of consultations with Indigenous communities

B.C. government provides $75,000 towards salmon study

Study looks at abundance and health of Pacific salmon in Gulf of Alaska

Murdered and missing honoured at Stolen Sisters Memorial March in B.C.

‘We come together to make change within the systems in our society’

UBC researchers develop inexpensive tool to test drinking water

The tricoder can test for biological contamination in real-time

Disgraced ex-Congressman Anthony Weiner released from prison

He was convicted of having illicit online contact with a 15-year-old North Carolina girl in 2017

Most Read