RedactedNarrative: V1 was on the south side of the Belle Fourche Reservoir fishing. A storm moved in causing rough waves and rain. O1 was driving into the waves (NW direction) and V1 was taking on water. O1 attempted to turn around, but failed. O1 continued driving V1 into the waves and attempted to get PFDs on. V1’s bow went underwater causing V1 to be vertical. The stern on V1 fell causing the boat to be turned keel side up. O1 and P1 jumped from boat before it went over without PFDs. O1 and P1 were able to get onto the keel of the boat until V2 picked them up. V1 drifted to the south east side of the lake and run aground.