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

CMTN unveils renovated House of Cedar

$18.4M upgrade and renovation cited as key to modern trades training

An unexpected sight south of Burns Lake

Cheslatta Carrier Nation Chief finds bear eating another bear’s carcass

Area restrictions rescinded in northwest B.C.

The orders will be rescinded Sept. 19 at noon

Verdun Mountain and Nadina Lake fires 100 per cent contained

Area restriction orders in effect for several fires

Vigil for Jessica Patrick

VIDEOS: Hundreds honour a young mother who lost her life. Jessica Patrick was 18.

VIDEO: Neighbours fear impact of B.C. tent city residents

Greater Victoria residents opposed to campers voice concerns at provincial campground

B.C. premier apologizes for removal of 1950s totem pole at Canada-U.S. border

First Nations say pole was raised at Peace Arch but removed to make way for tourism centre

‘Summer from hell’: vandals rob Fort St. James community garden following devastating wildfire season

The community rallied to keep the Health Minds Community Garden open in Fort St. James

Tornado touches down in Ottawa and Gatineau, Que.

Environment Canada says cars and homes have been damaged by severe thunderstorms and high wind gusts

RCMP confirm death of missing BC teen Jessica Patrick

No details on cause were given. Case is under criminal investigation and police are asking for tips.

CUTENESS OVERLOAD: 2 sea otters hold hands at the Vancouver Aquarium

Holding hands is a common – and adorable – way for otters to stay safe in the water

B.C. teen with autism a talented guitarist

Farley Mifsud is gaining fans with every performance

Yukon man facing new attempted murder charge in B.C. exploding mail case

Leon Nepper, 73, is now facing one charge each of aggravated assault and attempted murder

B.C. man who left hospice to run in upcoming election dies

A week after leaving hospice to go to city hall to declare his candidacy, David Hesketh has died.

Most Read