Ranking atmospheric rivers premature, says Environment Canada, months after B.C. vow
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.
Public Safety Minister Mike Farnworth had said the province could have a usable rating system for atmospheric rivers at the start of this year. The rain was brought by an atmospheric river, in which moist tropical air travels over long distances in a narrow band. On the west coast of North America, the phenomenon is known as a “pineapple express” because it tends to originate near Hawaii.
One aspect of the study aims to understand how a warming climate will affect the severity and duration of atmospheric rivers, Vingarzan said. “We are not going to increase the forecast model accuracy, but it can help better communicate the impact of the storm, and maybe can get some early alarm to the operational forecast,” he said.
In the meantime, Emergency Management BC said the province is prepared to use the existing Alert Ready system.
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