Mount Cheam in B.C.’s eastern Fraser Valley. (Wikimedia Commons)

High snowpack could lead to floods in wildfire-ravaged B.C. interior

Provincial snowpack sits at 127 per cent as of April 1

A higher-than-usual snowpack in April could lead to increased flooding risk in B.C.’s wildfire-ravaged interior, officials say.

River Forecast Centre hydrologist Jonathan Boyd said this winter’s snowpack sits at 127 per cent – 32 percentage points higher than last winter’s.

“The provincial average was 123 per cent of normal in 2012 … and there was considerable flooding throughout the province,” Boyd told reporters Monday.

Areas like the Okanagan and Similkameen, where the snowpack sits at a record-breaking 152 per cent, could be at risk for higher flooding. The risk for anything above 135 per cent is extreme.

“Last year in the Okanagan, the snowpack was 105 per cent of normal, but the lake still experienced record inflows,” Boyd said.

A higher-than-normal flood risk is expected in the centre’s Cariboo Chilcotin, Thompson Okanagan, west coast and Kootenay Boundary regions, where wildfires burned hundreds of thousands of hectares of forest last summer.

The risk comes as fires burn away trees that provide shade and allow for slower melting.

Heavy melts in those regions could lead to riverbank erosion, as well as damage to dikes.

“Due to the fires, there’ll be a lot more debris in rivers going downstream … which can lead to erosion along banks and dykes,” Boyd said.

However, he cautioned that snowpacks were only one facet of flood risk.

“Weather patterns during the snow melt season play a critical role in weather or not flooding occurs,” he added.

“Intense or prolonged rainfall or extreme temperatures are important factors that can lead to flooding even in areas with a normal snowpack.”

B.C. spent most of this past winter under La Nina conditions, which tend to be cooler and accumulate more precipitation for B.C.’s southern half.

The April snowpack statistics are important, he said, because 95 per cent of the snowpack for the year has already accumulated.

However, with this year’s La Nina conditions, snow could continue to pile up throughout April and May.

“Snow basin indices tend to increase by two to five per cent in April,” said Boyd.

Snowmelt in B.C. typically begins in mid- to late-April.

Just Posted

VIDEO: This is what buying legal pot in B.C. looks like

Take a look inside B.C.’s first and only legal pot shop located in Kamloops

10 things still illegal in the new age of recreational cannabis

Pot is legal – but there are still a lot of rules, and breaking some could leave you in jail

Cathy McLeod ready to run in Election 2019

“I have the passion, energy and support from my family to continue working hard for our region.”

‘Police are ready’ for legal pot, say Canadian chiefs

But Canadians won’t see major policing changes as pot becomes legal

Shuswap plane missing since 1987 discovered near Clearwater

A family finally has closure after a plane missing since 1987 was discovered in the Clearwater B.C.

B.C. NDP retreats again on empty-home tax for urban areas

Rate reduced for all Canadians, dissident mayors to get annual meeting

Jets score 3 late goals to beat Canucks 4-1

Winnipeg ends three-game Vancouver win streak

Two B.C. cannabis dispensaries raided on legalization day

Port Alberni dispensaries ticketed for “unlawful sale” of cannabis

Canada not sending anyone to Saudi business summit

Sources insist Ottawa never intended to dispatch a delegation this time around

Earthquake early-warning sensors installed off coast of B.C.

The first-of-its kind warning sensors are developed by Ocean Networks Canada

VPD ordered to co-operate with B.C. police watchdog probe

According to the IIO, a court is ordering Vancouver police to co-operate with an investigation into a fatal shooting

B.C. woman looks to reduce stigma surrounding weed-smoking moms

Shannon Chiarenza, a Vancouver mom of two, started weedmama.ca to act as a guide for newcomers to legal cannabis, specifically mothers

B.C. teen gives away tickets to Ellen Degeneres show, plans O Canada welcome

The Grade 9 student wanted to give away tickets in the spirit of inclusivity

Most Read