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

Gypsy moth information session comes to Campbell River

Experts from Natural Resources Canada, Canada Forest Services, the Canadian Food Inspection… Continue reading

Lack of security: why Vancouver Island food production is on the decline

Big Read: agriculture a big, expensive commitment as advocates push to make us more food secure

Change to one-hour parking on Pier Street has many up in arms

Council receives a petition signed by over 200 people wanting them to go back to 2-hour parking

More study requested into impact of Linda’s Place on Dogwood traffic

Cornfield, Samson: Using an alley as the only entrance/exit to an apartment complex is a bad idea

Round and round we go in the discussion surrounding Campbell River’s first roundabout

Majority of council says it’s heard enough about options and it’s time to move forward

REPLAY: B.C. this week in video

In case you missed it, here’s a look at replay-worthy highlights from across the province this week

Trump says North Korea agreed to denuclearize. It hasn’t.

Trump is claiming that North Korea has agreed to “denuclearization” before his potential meeting with Kim, but that’s not the case.

Suspect in deadly Waffle House shooting still being sought

Police say Travis Reinking is the suspect in a shooting at a Waffle House restaurant Sunday in Nashville that left four people dead.

G7 warned of Russian threats to western democracy

Ukraine foreign minister Pavlo Klimkin warns G7 of Russian war against Western democracy

Royal baby: It’s a boy for Kate and William

The Duchess of Cambridge has given birth to her third child, a boy weighing 8 pounds, 7 ounces.

Dix says B.C. remains focused on fighting youth overdoses in wake of teen’s death

Elliot Eurchuk’s parents say he died at his Oak Bay home after taking street drugs

Final week for ALR input

Public consultation process closes April 30

‘When everybody leaves: Counselling key to help Humboldt move on after bus crash

Dealing with life after a tragedy can be the worst part following a loss

Half-naked shooter guns down four, runs away in Nashville Waffle House shooting

Nashville police say they are looking for Travis Reinking in connection with the shooting

Most Read