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Environment Canada issues ‘red alert’ with 3 atmospheric rivers in the forecast

Atmospheric river on Nov. 26 saw 40-60 mm in areas of B.C.
An atmospheric river led to flooding across Metro Vancouver on Nov. 14. Three more are forecast for the weekend into next week, according to Environment Canada. (Shane MacKichan)

Environment Canada has issued a red alert for the first time, with three atmospheric river events forecast for the weekend into next week.

Areas like Abbotsford saw flooding due to heavy rainfall events last week, and in a technical briefing this afternoon, Nov. 26, Armel Castellan, Environment Canada meteorologist, said B.C. residents should brace for more.

“We had one atmospheric river yesterday,” said Castellan. “It brought between 40 and 6o millimetres, even more in the Howe Sound region and it has saturated the soils … what is forecast for this weekend, will be storm No. 2, and again for next week, Tuesday and Wednesday, will be storm No. 3-in-a-row. These are coming back-to-back-to-back with very little time in between.”

Environment Canada has issued rainfall warnings and special weather statements for areas across the province.

Metro Vancouver, Central and North Shores, Fraser Valley, Howe Sound, Squamish to Whistler and Sunshine Coast could see 60 mm of precipitation in southern sections and 120 mm near the mountains from midday Saturday till Sunday evening.

Hope to Merritt could see 40-60 mm from Saturday afternoon to Sunday overnight.

Eastern Vancouver Island could see 50-70 mm from Saturday morning to Sunday morning.

Western Vancouver Island could see the most with 100-130 mm from Saturday morning to Sunday afternoon.

There also has been significant snowfall in some areas, said Castellan, which could compound the situation. The B.C. River Forecast Centre has also issued high streamflow advisories along much of the coast and a flood warning on the Sumas River, Castellan said.

Castellan also said areas of the province have seen “the wettest fall on record” including, Victoria, Abbotsford and Vancouver.

An atmospheric river “taps into subtropical moisture and brings it all the way to the West Coast of Canada,” said Castellan. They can be very strong, much like the events that took place Nov. 13-15, he said.

RELATED: B.C. reviews municipal flood responsibility following storm

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Karl Yu

About the Author: Karl Yu

I joined Black Press in 2010 and cover education, court and RDN. I am a Ma Murray and CCNA award winner.
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