https://www.mercurynews.com/2019/11/28/thanksgiving-night-frost-advisory-issued-for-bay-area-before-weekend-of-rain/ > The dusting of snow on some Bay Area mountain tops Thursday morning signaled what’s in store for Thanksgiving — after the rain, the cold. > The cold front that brought the Bay Area’s first significant rain this season earlier in the week plunged the mercury into the 30s in many places on Thursday morning.