RedactedNarrative: On September 4th, 2015 at approx. 1650 I was dispatched to a report of a capsized vessel near buoy 26 with persons in the water. I responded on vessel 264 with Ranger and one USCG. We arrived in the Buoy 26 area but were unable to locate any vessels in distress. We were then updated that the capsized vessel was near buoy 36. We responded to buoy 36 and arrived on scene at approx. 1705. Upon arrival I observed a ~30ft houseboat that was capsized with its hull to the sky, floating adrift near the main channel directly across from buoy 33. At this time I also observed a white power vessel alongside the capsized houseboat with 4 persona aboard. 
  
  I contacted the power vessel and identified the family as the party associated with the capsized vessel. They stated that all persons were accounted for and no one was injured.
  I conducted a boating accident investigation, finding the operator of the houseboat at the time of the accident. He stated that they had been underway from the Dangling Rope area down to Wahweap with himself, and two others aboard the houseboat that , and another person following behind in their power vessel when a storm cell moved into the area, creating high winds (approximated at 25-30 mph gusts from the S.). 
  
  Along with the high winds, Operator stated that heavy choppy (2-3') had severely impaired his ability to maintain course. He further stated that while traveling at approx. 15 mph, his vessel had begun to list heavily to starboard, when he attempted to correct his course back to port, the hull of his vessel caught a large wave, brought him broadside to the winds and subsequently capsized his vessel. The family then stated that they had exited the vessel as fast as possible and swam away, with no time to don Personal Flotation Devices (PFD'S). At this time individual had maneuvered their power vessel alongside the capsized houseboat and picked the others out of the water. They then waited by the houseboat until help arrived.