Incident
An aircraft on approach to its destination was flying at 10,000 feet when the crew observed clouds ahead that "appeared bumpy." The seat belt sign had been illuminated for 10–15 minutes. The flight attendant was notified and announced the possibility of turbulence over the public address system.
Sequence of Events
Despite the warning, a passenger rose from her seat and entered the lavatory. As she exited the lavatory, the aircraft was inside a cloud and experiencing turbulence. At that moment, she lost her footing and fell.
Outcome
The fall resulted in a broken ankle. No other injuries were reported. The aircraft continued to its destination without further incident.