San Diego train stations are joining the airport in preparing for a surge of travelers throughout the holiday week. State of play: Thanksgiving is typically the busiest holiday for travel nationwide,

For those traveling using Amtrak, the service is reporting increased passengers compared to last year. On Tuesday, 10,000 people passed through Chicago's Union Station alone. On Wednesday, about 11,000 people were expected to do the same.

Thanksgiving Day starts off with a few flurries, especially near the lake. Morning clouds give way to afternoon sunshine as temperatures hold in the 30s. It is blustery and much colder from Friday through Monday.

Amtrak is accommodating a surge of Chicago travelers this day before Thanksgiving. Amtrak spokesman Marc Magliari says Thanksgiving is their busiest travel period of the year.

CBS News Chicago reporter Mugo Odigwe and CBS News Boston reporter Penny Kmitt have reports from their local airports where travelers are trying to make it to their destinations for Thanksgiving. And CBS News Philadelphia meteorologist Grant Gilmore has a look at the national forecast.