(CNN) – Another atmospheric river will flow into western Washington and parts of British Columbia, Canada this week.
Although parallel systems for the region seem to be breaking records lately, this phenomenon is really significant.
Rivers in the sky have led to landslides blocking roads, rivers inundating cities, and, in one case, bringing the bottom of an old lake back into the lake.
British Columbia typically experiences atmospheric river events in November, as does the Pacific Northwest. The challenge for both regions this year has been system consistency, with no drying breaks between them.
“The first atmospheric event on the river hit us hard on November 13-16, and in less than 48 hours there was 150-300 mm (roughly 6-11 inches) of rainfall,” said Johnson Zhong, a meteorologist with the Environment Department. Canada.
It also rained on top of fresh snow, exacerbating the flooding.
“At 1500-2500 meters (5000-8000 feet) there was up to 30-50 cm (1-1.5 feet) of fresh snow,” he said. “During one of our atmospheric river events, the rain was much higher than 2500 meters, so the rain melted the snow and helped create flooding.”
One of the most flooded areas was the Sumas area, about 50 miles east of Vancouver.