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

Green Aura cannabis dispensary shuts down

Decision follows appearance at North Cowichan council meeting

Drought alert posted for Koksilah and Chemainus Rivers

Around the Cowichan region hot, dry weather is drying up tributary streams as well

Canadian Tire delivers toys to ease kids’ street play pain in Chemainus

It’s like Christmas for 11 kids who are supposed to be confined to their yards by strata bylaw

Demolishing old Crofton Elementary School can’t come fast enough

Residents getting action on abandoned building that’s such an eyesore to the community

Two Chemainus Secondary students rewarded for their woodworking

Fotheringham and Gladman take home two of North Cowichan’s available three awards

VIDEO: Trudeau shuffles familiar faces, adds new ones to expanded cabinet

Justin Trudeau shuffles his front bench Wednesday to install the roster of ministers that will be entrusted with leading the Liberal team into next year’s election.

Wildfires erupt in B.C. Okanagan forcing evacuation orders and a highway closure

Check out a list of up-to-date information on blazes happening within the Kamloops Wildfire Centre.

Grizzly bear jumps in river, chases B.C. kayaker

The bear got a bit too close for comfort along the Elaho River near Squamish

Island man convicted of 1999 sex assault at Fraser Valley music festival

James Allen Redden, formerly of Nanaimo, was found guilty of three charges

Parks Canada looks to shine light on cloudy future for historic sites

A plan is in place to produce 10-year plans designed to turn around sagging attendance figures

B.C. poet shines a bright light on struggle with homelessness

Book launch for John La Greca’s Homeless Memorial is at Vernon’s Gallery Vertigo July 21.

Ontario police say attack on Muslim man was motivated by hate

Two men, aged 27 and 19, have been charged with assault in the incident

City orders largest Kinder Morgan protest camp to leave

Residents of Camp Cloud near the Trans Mountain work site have 72 hours to leave

14-year-old pilot attempts to break Guinness World Record at B.C. airport

Mohd Shaikhsorab wants to become youngest pilot with fewest hours logged to fly solo

Most Read