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One aspect of the study aims to understand how a warming climate will affect the severity and duration of atmospheric rivers, Vingarzan said. This includes ensuring that situationally relevant information is timely, accurate and well understood,” she said. “It’s essential that any proposed scale, or specialized product designed to assist in emergency management, meets the decision-making needs of the public authorities. Roxanne Vingarzan, a senior manager of applied sciences at Environment Canada, said researchers are aiming for the system to include about five to eight levels, but that it is “very much in its research stage.” “This is essential for public safety,” it said in a statement. Ministry of Public Safety did not directly respond to questions about an updated timeline.īut Environment Canada said it is instead focused on analyzing the “relevance” of such a system for Canada and noted any new products must undergo rigorous evaluation and peer review to ensure validity and reliability before implementation. The weather office said it is studying various rating scales to reflect the intensity of atmospheric rivers with a numeric value, but “there are no immediate plans to formally adopt such a scale operationally in the short term.” On the west coast of North America, the phenomenon is known as a “pineapple express” because it tends to originate near Hawaii. The rain was brought by an atmospheric river, in which moist tropical air travels over long distances in a narrow band.

Landslides shut down the Trans-Canada Highway and other key roads, and the Sumas Prairie was flooded as dykes were overwhelmed. In the previous few days, about 20 rainfall records had been broken across the province. Looking to be implemented at the beginning of January 2022,” he told a news conference on Nov. My expectation is, from what I’ve been told, that will be coming. “That will allow us to, I think, prepare more effectively. Public Safety Minister Mike Farnworth had said the province could have a usable rating system for atmospheric rivers at the start of this year. “A decision on whether or not to implement such a scale as an operational information product would be premature at this time,” Environment Canada said in a statement. When torrential rain caused widespread flooding and washed out major highways across British Columbia last fall, the provincial government was quick to flag the creation of a system to rank atmospheric river systems.īut eight months later, Environment Canada and its scientists say there is still no timeline for when such a system might be operable.

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