Smoke may not leave us until September: Environment Canada

Aug 16, 2018 | 4:08 PM

KAMLOOPS — An Environment Canada meteorologist says it could be September before Kamloops sees a smoke-free sky again.

Matt MacDonald says the ridge trapping the smoke over the BC Interior is one that normally gives us the sunshine and warm summers for which we are known.

“We typically see these big ridges of high pressure set up anywhere in July or August bringing us the beautiful, summer-like weather we’re used to in B.C.,” said MacDonald. “But when they coincide with the very active wildfire season, they act to trap all that smoke down in what we call the boundary layer.”

MacDonald says he and his colleagues have been poring over all available models, trying to determine when the ridge will move off from B.C.

The answer? Not soon.

“We will see a slight shift in the winds over the weekend, which may help temporarily alleviate the air quality issues,” said MacDonald. “But as long as these wildfires keep burning, we’re going to be stuck with the smoke.”

MacDonald notes there are wildfires burning in every corner of the province, and even beyond our borders, meaning even a shift in the wind doesn’t guarantee clear air.

“Even if the winds shift to the northwest, we’ll be getting winds from the Central Interior and northwest. Earlier in the summer, we saw wildfire smoke from as far as Alaska and Siberia. We’ve also seen the smoke drift northwards across the border from California and Oregon. In any direction you look in western North America, there are wildfires burning.”

Rain might provide some relief, but MacDonald says there is no rain in the forecast.

“This is a difficult time of year to get any sizeable weather system delivering precipitation. We might just have to wait until September,” said MacDonald.

The choking smoke has resulted in air quality advisories in place over much of the province for much of the past two weeks.

“We’re under this very resilient, stable pattern and as long as this ridge doesn’t move along, we’re going to be stuck under this smoke for quite a while,” said MacDonald.