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

Fire ignites at Kelowna homeless camp

No one was hurt in the incident, RCMP are investigating the cause of the fire

UPDATE: Kelowna mayoral candidates talk about crime

Candidates talk about an issue on many city residents’ minds—how to deal with crime downtown

Film exposing effects of Canadian mining company to be shown in Kelowna

Hudbay Minerals’ legacy of lead poisoning, and civil-suits including allegations of murder, rape and shootings

Kelowna councillor candidate drops out of race

Curtis Cinibel confirms he is withdrawing the civic election after filing paper to run

Okanagan College hosts 10th annual Powwow

The Kelowna campus will once again host the event Sept. 20

Store recognized for inclusive employment efforts

Shoppers Drug Mart in Summerland presented with certificate from WorkBC

Fresh-faced Flames fend off Canucks 4-1

Vancouver drops second straight NHL exhibition contest

VIDEO: B.C. deer struggles with life-preserver caught in antlers

Campbell River resident captures entangled deer on camera

Scheer pushes Trudeau to re-start Energy East pipeline talks

Conservative Leader Andrew Scheer questioned the Prime Minister over Trans Mountain project

Mistaken identity: Missing dog claimed in Moose Jaw belongs to another family

Brennen Duncan was reunited with a white Kuvasz that was found in Saskatchewan

Abandoned kitten safe and sound thanks to B.C. homeless man

‘Jay’ found little black-and-white kitten in a carrier next to a dumpster by a Chilliwack pet store

Police chief defends controversial marijuana seizure

Advocates said cannabis was part of an opioid-substitution program in Vancouver’s Downtown Eastside

Trans Mountain completes Burrard Inlet spill exercise

Training required, some work continues on pipeline expansion

Supporters of B.C. man accused of murdering Belgian tourist pack courtoom

Family and friends of Sean McKenzie, 27, filled the gallery for brief court appearance in Chilliwack

Most Read