Today (10/23/17) at 1:24 pm, a flock of 282 Cackling Geese flew over our house northwest of Petaluma. They flew in from the west and flew off to the east. About two minutes later, a second flock of 75 followed after the first flock. These numbers are estimates based on counting the birds in photos that I took.
Here's my eBird checklist which includes a photo and audio of the first flock: