The storm gate is open when a lot of people are planning on traveling this week for Christmas. A Winter Weather Advisory is posted for the Sierra, including northeast California, the Tahoe Basin, and Mono County through 7 pm Tuesday. This is a fast storm, with a good amount of moisture and plenty of wind. We’ve seen stronger storms before, but this will be a decent one with high impacts, especially since a lot of people will be traveling. A warning is more dangerous than an advisory, but still means caution.