The woman was given an undisclosed amount of cash and then left the store.
No weapon was observed during the robbery, and no one was hurt.
The woman is described as a white female, 48-55 years old, 5'4"-5" tall, with a slender build and a light complexion. She wore glasses, a grey sweatshirt and jeans and carried a large cream colored purse. Witnesses say she may have had crooked teeth.
Crime Stoppers is offering up to $5,000 for information leading to the charging and arrest of this suspect, or any felony suspect. If you have information about this crime, please call the Crime Stoppers Tip Line at 713-222-TIPS (8477) or the Houston office of the FBI at 713-693-5000.