Residents across the Bay Area should brace for more chilly temperatures overnight and Friday morning as a frigid Canadian air mass continues its journey across much of the Western United States, according to the National Weather Service.
A freeze warning issued for much of the Bay Area will remain in effect until 9 a.m. Friday.
The warning was issued for the entire Bay Area with the exception of San Francisco and could mean more record-setting temperatures in the South Bay and North Bay valleys, National Weather Service forecaster Steve Anderson said.
“We’re finally getting our winter,” he said.
Thursday morning, temperatures dropped to as low as 16 degrees in Napa and 18 degrees in Morgan Hill, according to the weather service.
In San Rafael, residents braved 30-degree temperatures Thursday morning and those in Oakland set out in the 34-degree chill, Anderson said.
Both beat cold-weather records set in 1972.
In Mountain View, temperatures dipped to 32 degrees this morning, breaking a 15-year record, according to the National Weather Service.
Anderson said temperatures are expected to rise slightly on Friday morning, but that rain is expected on Saturday, as well as snow above 2,500 feet throughout the Bay Area.
He said motorists in the region should drive with extra caution on Saturday night and Sunday morning, when runoff from rain and snow is expected to create icy patches on area roadways.
Warmer temperatures are expected next week.
The cold snap is the result of a high-pressure cold air mass that originated in Northern Canada.