A significant storm impacted Northern California on November 21, 2024, bringing heavy rain and snow, with forecasts indicating potential flash flooding and rockslides.
The National Weather Service has issued a flood watch extending into Saturday for areas north of San Francisco. This event is attributed to the strongest atmospheric river recorded this season affecting California and the Pacific Northwest.
Winds from the storm caused two fatalities and left hundreds of thousands without power in Washington state. Northern California is expected to receive up to 16 inches (approximately 41 centimeters) of rain through Friday, with Santa Rosa reporting about 5 inches (approximately 13 centimeters) within a 24-hour period.
Officials have warned of dangerous conditions, including flash flooding and mudslides. Several small landslides have already occurred, with one impacting Highway 281, resulting in a vehicle crash.
A winter storm watch is in effect for the northern Sierra Nevada, where up to 15 inches (38 centimeters) of snow could accumulate above 3,500 feet (1,066 meters). Wind gusts in mountainous areas may exceed 75 mph (121 kph).
In Washington, nearly 376,000 power outages were reported due to strong winds and rain, leading to tree falls that resulted in two fatalities. In California, power outages numbered around 21,000 by Wednesday evening.
Interstate 5 faced closures due to severe winter weather, and disruptions were reported at San Francisco International Airport, with numerous flight delays and cancellations.