Have you noticed more of a crowd around the free coffee in your office kitchen lately?

Starbucks announced that it will miss Wall Street's expectations for its second fiscal quarter and it lowered its outlook for the year, citing "the sharp weakening in the U.S. consumer environment."

Starbucks expects to report revenue growth of 12 percent and earnings per share of 15 cents when it releases its quarterly figures on April 30. Analysts had expected it to earn 21 cents per share for the quarter, up from 19 cents per share during the same period last year. Starbucks said restructuring efforts cost three cents per share in the quarter.

It also expects that its full-year 2008 earnings will be "somewhat lower than the $0.87 reported in fiscal 2007." Analysts expected it to earn 97 cents per share.

"The current economic environment is the weakest in our company’s history, marked by lower home values and rising costs for energy, food, and other products that are directly impacting our customers," Starbucks' chief executive, Howard Schultz, said in a statement.

Same-store sales for the quarter, which compare revenues year-over-year for individual stores, are expected to decline by a rate in the mid–single digits.

Despite the setback, Schultz says he's still enthusiastic about Starbucks' new customer experience and product initiatives, such as its Pike Place Roast, which launched early in the current quarter.

Investors did not take the news well. In after-hours trading, Starbucks shares tumbled more than 10 percent.