NOUS55 KVEF 081556 CCA OAVVEF DATE: 755 AM PST THU DEC 8 2011 MEMORANDUM FOR: THE RECORD FROM: CHRIS STACHELSKI/WFO LAS VEGAS SUBJECT: AIRCRAFT ACCIDENT, NEAR LAKE MEAD, NV, 12/08/11 EVENT: ACCIDENT INFO: A TOUR HELICOPTER DEPARTED MCCARRAN INTERNATIONAL AIRPORT FOR THE HOOVER DAM AND WAS SLATED TO RETURN TO MCCARRAN WHEN IT CRASHED NEAR LAKE MEAD NEAR A SOUTHERN NEVADA WATER AUTHORITY TREATMENT PLANT. PILOT NAME...SUNDANCE HELICOPTERS ACFT TYPE...EUROCOPTER AS350 REG NMBR....UNKN OFFICE: WFO VEF DEATHS: 5 INJURIES: 0 OBSERVATIONS: MCCARRAN INTL AIRPORT METAR KLAS 080156Z 20008KT 10SM CLR 09/M12 A3011 RMK AO2 SLP201 T00941117 METAR KLAS 080056Z 21007KT 10SM CLR 11/M12 A3011 RMK AO2 SLP201 T01061117 METAR KLAS 072356Z 20004KT 10SM CLR 12/M12 A3012 RMK AO2 SLV204 T01171122 10122 20072 56020 TAF: KLAS 072320Z 0800/0824 VRB03KT P6SM SKC FM080300 21006KT P6SM SKC FM081700 VRB03KT P6SM SCT250 FOXTROT: WINDS ALOFT BASED ON KVEF SOUNDING 00Z/08 7000 FT WND 030/10 KT 12000 FT WND 270/13 KT 14000 FT WND 280/15 KT 16000 FT WND 300/11 KT 18000 FT WND 250/10 KT 20000 FT WND 220/07 KT 25000 FT WND 130/04 KT IN FLIGHT ADVISORIES: NONE. COMMENTS: AWAITING ADDITIONAL DETAILS. WEATHER DOES NOT APPEAR TO BE A FACTOR. SYSTEMS: NONE.