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

Technical rescues on the rise for local fire departments

Rescues allow firefighters to use different skill set

Westshore Warriors have back-to-back undefeated seasons

Local players could continue to play together at Belmont Secondary

Fundraising events ramp up for Tour de Rock

Dancing with the Cops, barbecue and garage sale taking place

VIDEO: Trudeau shuffles familiar faces, adds new ones to expanded cabinet

Justin Trudeau shuffles his front bench Wednesday to install the roster of ministers that will be entrusted with leading the Liberal team into next year’s election.

14-year-old pilot attempts to break Guinness World Record at B.C. airport

Mohd Shaikhsorab wants to become youngest pilot with fewest hours logged to fly solo

Price no guarantee for safety with horse riding helmets: new report

A Swedish insurance report reveals that many brands of equestrian helmets do not protect riders as well as they could.

One year later: Still no suspects in killing of 13-year-old B.C. girl

Marrisa Shen was killed in Burnaby’s Central Park on July 18, 2017

Cougar shot by police in Nanaimo

Shooting occurred in water at Nanaimo Yacht Club at about 1:30 a.m. Wednesday

BC Games opening ceremonies promise to be magical

Features Shane Koyczan and his band, Asani, parade of athletes, and lots more

VIDEO: Toronto Raptors send DeMar DeRozan to Spurs in colossal NBA trade

Toronto also sent Jakob Poeltl and 2019 first-round pick, gets Kawhi Leonard and Danny Green

More lightning forecast as storm sparks 38 new wildfires in B.C.

22 new fires in are burning in the Kamloops Fire Centre according to the BC Wildfire Service.

Most Read