While rest of US digs out from arctic blast, the Golden State sees welcome showers to mitigate dry days in coming new year

A major storm known as an “atmospheric river” is pummeling California with heavy rain and high winds, continuing a streak of weather whiplash that has jolted the state from unseasonal heat to downpours in a matter of days.

The storm, spawned by a low pressure system off the Pacific north-west, delivered deluges across the San Francisco Bay Area as it made landfall on Monday night, prompting the National Weather Service to issue flood advisories and watches through large parts of central and northern California. The storm is forecast to soak the southern part of the state by Tuesday evening, although it will soften as it moves down the coast. Forecasters said California will experience unsettled weather through the week.