https://www.mercurynews.com/2023/01/29/freezing-temperatures-on-tap-for-bay-area-snow-to-hit-sierra-nevada/

Freezing temperatures are expected to grip much of Northern California over the next several nights, prompting officials to open warming shelters to protect unhoused people from the threat of hypothermia.

The blast of cold air is expected to arrive Sunday and continue into Wednesday, dropping temperatures to 32 degrees or colder in parts of the Bay Area. To the east, howling winds are expected to accompany snow showers that could drop several inches of fresh powder over the Sierra Nevada.