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

Where to find community holiday feasts in Langley

A variety of groups are hosting free meals for the Langley community to fill up on.

Looking for the buzz on Langley tree chipping events

Send us details on tree chipping events so we can help spread the word.

Surrey boy’s birthday wish raises $13,500 for rescued farm animals in Aldergrove

Matthew Farden received a large donation from the mister Blake Foundation towards a sanctuary farm.

New laws give Langley RCMP more power to test suspected drunk drivers

New legislation take effect this week that will allow broader breathalyzer testing.

Kazakhstan makes it three hockey wins in a row, downing BCIHL Young Stars at Langley Events Centre

‘We had a fighting chance,’ said BCIHL Young Stars head coach Barret Kropf

VIDEO: Ex-NASA engineer pranks mail thieves with glitter bomb trap

Package thefts are common this time of year, but YouTuber Mark Rober used his engineering skills

Lightning top Canucks 5-2 in feisty battle

NHL’s No. 1 team too much for Vancouver

Coquihalla closed between Hope and Merritt

The highway is closed in the northbound lane

FortisBC says you can return to normal gas use following pipeline fire

Utility says increased pipeline capacity, warmer weather have allowed supply to reach normal levels

CSIS collected info on peaceful groups, but only in pursuit of threats: watchdog

Security Intelligence Review Committee says fears unjustified after reviewing evidence, testimony

Lower Mainland man receives apology after getting kicked out of library

Mike Wilson fears the same treatment he received Nov. 2 by security guards will happen to others

Canada ranks 16th on annual gender gap list

This is the second year Canada has placed 16th in the World Economic Forum’s list

VIDEO: Tornado rips through city west of Seattle

Reports indicate five to seven homes damaged in Port Orchard, Wash.

Trial date postponed for man charged with killing Abbotsford police officer

Oscar Arfmann’s trial pushed back from January to May 2019

Most Read