North Bay residents remain on alert after three mountain lion sightings in three different cities in less than two days. The most recent sighting was in Yountville on Friday. There were also reports of a mountain lion in parking lots near a Kohl’s department store in Petaluma shortly after midnight Thursday. There were more sightings in a residential neighborhood in Cotati at about six o’clock that morning. Law enforcement officials still aren’t sure if the same big cat is responsible for each sighting.