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

Gas tank of Langley man’s pickup drilled to steal fuel

Record-high gas prices may be to blame for the theft that has left him without a truck

Chilliwack RCMP seek shoplifting suspect caught on video

Man allegedly connected to automobile theft in Abbotsford, shoplifting in Langley

Reconciliation walk builds relationships between settlers and Indigenous peoples

Walk in the Spirit of Reconciliation begins May 25 in Fort Langley

Appeal filed in Langley condo case

Lawyer for buyers seeks a court order preventing cancellation of purchase contracts

VIDEO: Legally blind man pickets supermarket in wake of alleged discrimination

Matt Salli and Save-On-Foods working on a solution, following ‘unfortunate’ incident

VIDEO: B.C. man recognized for spinning basketball on toothbrush

Abbotsford man holds world record for longest duration of time of 60.5 seconds

The simple beauty of a barn

Architect’s labour of love wins award from Architecture Institute of BC

B.C. set to introduce pot laws, but years of fine tuning likely: minister

Legislation regulating recreational marijuana is expected to be introduced Thursday

Canadian driver uses lawn chair as driver’s seat, gets caught

Ontario police detachment caught the male driver during a traffic stop

B.C. moves to restrict pill presses in opioid battle

Minister Mike Farnworth says federal law doesn’t go far enough

83-year-old convicted murderer escapes from B.C. prison

RCMP are asking for the public’s help to locate Ralph Whitfield Morris

VIDEO: Vets, volunteers set up vaccination station for sick bunnies

Volunteers, vets try to stop spread of lethal virus

If you see a dog in a hot car, don’t break in: SPCA

People are being discouraged from smashing windows to free animals. The SPCA has tips on what else you can do.

Municipal election loophole will be fixed, premier says

Union, corporate donations still allowed for slate party ‘operational’ needs

Most Read