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

Port McNeill Cannabis Committee stumbles out of the gate

“I’m worried we could just be all over the map and I need to see a plan.”

Port Alice’s new RCMP officers going through clearance process

The medical process can take several months to complete as there are several steps involved.

East Zeballos placed under evacuation alert as “out of control” wildfire approaches homes

BC Wildfire Service says rolling debris on steep terrain poses danger to firefighters

B.C. declares state of emergency as more than 560 wildfires rage

This is only the fourth state of emergency ever issued during a fire season

Port Hardy Fire Rescue knocks down wildland fire

PHFR members responded to the scene, located the fire, and contained it to the immediate area.

PHOTOS: B.C. city wakes up to darkness under wildfire smoke

The rest of the province also dealing with thick haze as smoky skies continue

Hospitals to see ‘delays’ in care after losing Saudi students, health group says

About 1,000 Saudi residents called back to kingdom after suspending diplomatic relations with Canada

Bernier diatribe against ‘extreme multiculturalism’ boosts Liberal coffers

Party spokesperson Braeden Caley says online donations doubled, social media engagement quadrupled

‘Disjointed’ system hinders British Columbia First Nations in wildfire fight

More than 550 wildfires were burning in B.C. and crews were bracing for wind and dry lightning

Castlegar bridge designed by architect of collapsed Italian bridge

Riccardo Morandi designed the Kinnaird Bridge, which is part of Highway 3.

Federal government announces over $115 million to Royal Canadian Navy

Defence Minister Harjit S. Sajjan was at Victoria’s CFB Esquimalt to announce missile system upgrades

RCMP nab prolific car thief after month-long, B.C.-wide search

A province-wide warrant was issued for Brian Robert Stephan in June for a litany of offences

Letter to the editor: Dismayed at the NDP’s interference with the Kinder Morgan pipeline

“Mr. Horgan, I realize you have taken a political stance on the pipeline…”

Court sides with developer in Jumbo ‘substantially started’ dispute

Resort developer successfully argues 2014 decision that halted the project was unfair

Most Read