Wind Loads are to be per the IBC basic wind speed of 90 mph 3 second gust. This may be higher in special regions along the Montana border. See ATC Hazards By Location for information.
Seismic (earthquake) loads are to be as required by the IBC. For specific accelerations numbers see the USGS National Earthquake Hazards Programs.
Snow loads are to be as per IBC. We will post known ground snow loads established by local governments here in the near future. Until then, see ATC Hazards By Location.