With powerful Santa Ana winds expected to create challenges for firefighters Tuesday, the Bobcat Fire burning in the Angeles National Forest north of Monrovia nearly doubled in size for the second straight day. The Bobcat Fire has burned 10,344 acres and still had zero containment as of 10 p.m. Tuesday, according to the U.S. Forest Service. The fire is churning through some vegetation and brush which has not burned in more 60 years. “The canyons that this fire has lined up with — Monrovia Canyon, Santa Anita Canyon, Little Santa Anita Canyon — those canyons have not burned since 1957 in the Monrovia Peak Fire,” Angeles National Forest Chief Robert Garcia said Monday.