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

Snow on the way for Elk Valley

Winter weather advisory issued for East Kootenay with up to 15cm of snow expected over the next week

Snow removal still an issue for mobility challenged in Fernie

Disability advocate sees little improvement in sidewalk clearing; City promises to review policy

Sparwood trails community growing

Sparwood Trails Alliance grows trail network, membership; hosting fatbike event February 2

Huge demand for youth funding in the Elk Valley

Emily Brydon Youth Foundation overwhelmed by 2018/19 winter applications from local youth

Fernie sports store kicking goals

GearHub turns focus to online market after opening second location in Fernie

B.C. opioid crisis to get same world-renowned treatment approach as HIV/AIDS

A program that focuses on treatment as prevention will roll out Jan. 17

Former welfare clients still owed money, B.C. Ombudsperson says

Investigation found 2,600 people docked illegally for earning income

Prince George could get province’s second BC Cannabis Store

The first brick-and-mortar government retail location opened in Kamloops on Oct. 17

B.C. chowdery caught up in ‘rat-in-soup’ scandal to close

Crab Park Chowdery will be shutting down Jan. 20

Teen vaping is an epidemic: US government

E-cigarettes are now the top high-risk substance used by teenagers, outpacing cigarettes, alcohol, marijuana

Vancouver councillors unanimously approve motion declaring climate emergency

Vancouver joins cities like Los Angeles and London

Caribou herd disappears from Kootenays after last cow relocated

One cow from the South Selkirk herd and two from the Purcells were moved this week

‘I never said there was no collusion,’ Trump lawyer says

President Donald Trump’s lawyer Rudy Giuliani says he has ‘never said there was no collusion’

Body of Canadian miner found after African kidnapping

Kirk Woodman’s body was discovered 100 kilometres from the site where he worked for Progress Mineral Mining Company in Burkina Faso

Most Read