SAN DIEGO - Retailers are  getting a jump on Black Friday this year. 

Shoppers lined up for doors to open at a Kmart store on University Avenue in Chollas Creek early Thanksgiving Day.  The store, along with Kmarts around San Diego County,  opened at 6 a.m.

According to store advertisements, Sears, Toys 'R Us and Wal-Mart plan to open at 8 p.m. tonight. Target is scheduled to open at 9 p.m. Best Buy, Kohl's and Macy's stores are due to open at midnight.

The National Retail Federation says 71 million Americans are expected to shop during the holiday weekend, while another 76 million may go to a store if tempted by the right deal. The combined figure is down about 5 million from last year.

"Savvy retailers are getting the word out to customers about in-store offers and events using online vehicles such as Facebook, email, Twitter, and mobile alerts," said Vicki Cantrell, executive director of the federation's shop.org website. "Now more than ever retailers are integrating their digital and in-store promotions, working to create that seamless shopping experience that they know consumers demand and expect."

Click here for more Black Friday information.