It appears as if this picture is a really cool example of Radiation (or Tule) fog, which formed in the Valley after recent rains.
Another round of rainy weather is heading toward the Bay Area just days after a powerful storm delivered a wallop of flooding and power outages throughout the region this week.
A team of U.C. Berkeley climate researchers say models of future cloud behavior suggest a big jump in United States lightning strikes this century.
Low clouds and drizzle Tuesday morning caused flights to be delayed by up to an hour at San Francisco International Airport, a duty manager said.