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

Houston athlete trying out for regional girls’ team

Zone 7 girls’ team is first in eight years

Winter road maintenance standards boosted

Quicker response times, longer winter tire season to be implemented

HVAC overhaul to continue this summer

Upgrades at Houston Secondary School (HSS) are a long-time coming, according to… Continue reading

Northern B.C. rail service is unreliable and inadequate, trade minister says

Bruce Ralston pushes federal minister of transport to ensure reliable supply of rail cars

Celebrate the Value of Volunteering

National Volunteer Week is April 15-21

Lt.-Gov. Guichon believes she made the right decision in last B.C. election

Outgoing Lt.-Gov Judith Guichon said her most memorable moments weren’t surrounding the election

How to keep local news visible in your Facebook feed

Facebook has changed the news feed to emphasize personal connections. You might see less news.

NAFTA: Talks continue through weekend in scramble to get a deal

Foreign Affairs Minister Chrystia Freeland called negotiations ‘perpetual’

Pulp mill fined $900,000 for leaking effluent into B.C. lake

Mackenzie Pulp Mill pleaded guilty to depositing deleterious substance into water frequented by fish

B.C.’s 2-year lobbying ban starts May 1

Office of the Registrar of Lobbyists can grant exemptions from the prohibition if public interest

Horgan speaks of government’s successes to ‘friends’ at CUPE BC convention

CUPE BC president Paul Faoro said was first time a B.C. premier addressed convention in some time

Speed Skating Canada fires coach Michael Crowe after investigation

Crowe was a coach on the American team from 1983 to 1991 and again from 1999 to 2006

5 things to know about the ongoing influx of asylum seekers in Canada

Number of illegal border crossings are up this year – as RCMP, military, politicians try to combat

Time to let go for BC bears, otters, bobcat

Northern Lights Wildlife shelter near Smithers set to release orphaned animals this spring.

Most Read