Bay Area drivers should exercise extra caution today, as it is the first significant rainfall of the season and thus will cause extra-slippery roadways, the National Weather Service said.
Rain is expected throughout the Bay Area today, with the possibility of further, off-and-on showers through Wednesday.
The weather service also warned of dangerous driving conditions in a "Hazardous Weather Outlook":
"MOTORISTS ARE URGED TO USE CAUTION AS THIS FIRST SIGNIFICANT RAIN OF SEASON FOR MUCH OF THE AREA WILL RESULT IN LEACHING OUT OF LONG-ACCUMULATED OILS IN THE PAVEMENT...AND THUS VERY SLIPPERY ROADWAYS."
Rainfall totals through tonight are forecast to be around 1-1/4 inches in the wettest portions of the North Bay coastal hills and to range between 1/4 and 1/2 inches at lower elevations around the Bay, the weather service said.