Canada and U.S. – West Coast Storm

A powerful Pacific storm system is expected to cause significant transport disruptions, power outages, and property damage along the US West Coast and southwestern British Columbia, Canada through Dec. 12. Strong winds and very heavy rainfall are forecast from British Columbia’s Central Coast to Southern California; blizzard conditions are likely in the High Sierras and at higher elevations in the Pacific Ranges in British Columbia. Rain and snow will persist in the Sierra Nevada Range into the afternoon of Dec. 12. The National Weather Service has issued numerous watches, warnings, and advisories for high winds, flooding, and winter weather in the affected states. Blizzard warnings are in effect for the High Sierras above 4,500 feet (1,372 meters). Snowfall of up to 48 inches (122 cm) is possible along the Sierra Crest through 1600 PST Dec. 12. Serious concern exists about landslides and mudslides, particularly in locations where recent forest fires have occurred. Flash and areal flooding are highly likely. Flight delays and cancellations can be expected at high-volume airports along the Pacific Coast.