SAN FRANCISCO (AP/CBS13) — A major storm ramped up Sunday with snow in Northern California that forced drivers to wrap their tires in chains and light rain in the lower elevations.

The storm promises to drop up to 8 feet of snow on the highest peaks and drench other parts of California. It’s expected to intensify overnight into the early part of the week and bring strong wind that could lead to power outages.

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Locally, its forward progress stalled over the Bay Area but was expected to gradually shift southward and intensify Sunday night through Monday, according to the National Weather Service.

Isolated thunderstorms are forecast to develop behind the front later Monday and Tuesday.

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A second system will bring back widespread rain and snow chances Wednesday through Thursday.

Pacific Gas & Electric sent crews to clear vegetation away from power lines to reduce the chance of electricity outages. Meanwhile, forecasters warned people in the Sierra Nevada to prepare for days of snowfall.

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(© Copyright 2021 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)