B.C. flood watch to intensify over next week

Heat wave speeding up snowmelt process

A unusually warm spring heat wave is raising flood warning concerns across the Okanagan and Shuswap regions over the next week, according to the B.C. River Forecast Centre.

Dave Campbell, head of the forecast centre, says the snow melting has been accelerated by temperatures trending six to eight degrees above the normal average, mixed with the potential for the heat to be briefly interrupted by rain later this week.

Related: Temperature soar to record-breaking heights in Kelowan, Vernon

“The weather will be critical over the few weeks,” Campbell explained. “There is a strong high pressure surge right now will a small potential disturbance that will generate rain leading into the long weekend, but that high pressure system is expected to rebuild and be more prolonged leading into next week.”

Campbell said in the South Okanagan, the rising Similkameen River is causing flooding headache, with a new peak level expected to be reached within the next three to five days.

He said flow projections of 800 cubic metres a second are anticipated for the peak freshet period, having already reached 600.

Related: Provincial aid for flood victims

“How high it goes will depend on a couple of pieces. One is how much snow at the higher elevation melts as from the snow perspective at some point that process will run out of gas, and what uncertainty the weather might bring through this week, as getting more rain will bump things up again,” he said.

Campbell said the Central and North Okanagan regions haven’t dodged a flood bullet yet, noting the mid-snow levels, 1,500 to 2,000 feet, are about two-thirds melted while the higher elevations above that are about 10 to 20 per cent melted.

“I think it would be premature to talk about dodging a bullet. Uncertainty over all rivers in the region right now makes them extremely vulnerable to flooding at this stage. The Mission Creek system and some around Vernon are very much in a transition period so we’ll find out more about the risk factor as that high elevation snow starts to melt at a higher rate,” he said.

Campbell added the Salmon River in the Shuswap, like the Similkameen, is another river that has already seen some peaks and valleys in its freshet enhanced flows.

“I think (the Salmon River) is one of those rivers where we have seen it peak, have seen it come down a bit, and now we are seeing it rise again. With a further warming trend the next four to seven days will be critical. If we get through that, then we should start to see improving conditions.”

To report a typo, email: edit@kelownacapnews.com.


@BarryGerding
barry.gerding@blackpress.ca

Like us on Facebook and follow us on Twitter.

Just Posted

Oversize load collides with Highway 1 overpass in Chilliwack

Traffic disrupted eastbound around Lickman Road over pass Monday morning

Harrison workers back on the job

Union calls new agreement ‘a good compromise’

Campfire ban coming into effect across West Coast

The Coastal Fire Centre says bans will begin on Wednesday

Heat warning issued for Metro Vancouver

Inland areas expect to hit at least 26 degrees for daytime highs

Trudeau asks transport minister to tackle Greyhound’s western pullout

Prime Minister Justin Trudeau says he’s asked Transport Minister Marc Garneau to find solutions in Greyhound Canada’s absence.

Restaurant Brands International to review policy over poaching employees

One of Canada’s largest fast-food company to review ‘no-poach’ franchise agreements

Calgary family’s vacation ends in tragedy on Texas highway

Three people died and four others were injured in the crash

Union construction cost competitive, B.C. Building Trades say

Non-union firms can bid on infrastructure, but employees have to join international unions

Trudeau to shuffle cabinet ahead of Liberals’ team for 2019

Trudeau could lighten the work loads of cabinet ministers who currently oversee more than one portfolio

Car calls 911 on possible impaired B.C. driver

A luxury car automatically calls Princeton police to scene of crash involving alcohol

BC Games marks 40 years in 2018

Cowichan Games a milestone for BC Games Society

Coleman not running for Surrey mayor

Langley East Liberal MLA said he’d been approached about running

Most Read