The U.S. Nuclear Regulatory Commission (NRC) is issuing a new Regulatory Guide (RG) 3.77 (Revision 0), "Weather-Related Administrative Controls at Independent Spent Fuel Storage Installations." This RG provides applicants and licensees with methods that the NRC staff considers acceptable for specific or general independent spent fuel storage installation licensees and certificate of compliance holders to comply with NRC regulations for protection against environmental conditions and natural phenomena.