Due to vegetation greenup and in anticipation of the coming wildfire season, the Montana Idaho Airshed Group spring burn season ends May 31st. Smoke management decision support for member burners including meteorology and notification of any open burning restrictions is no longer coordinated or communicated via the Airshed Management System, and responsibility for any restrictions reverts back to the local county, state, and tribal cooperators whose links are accessible from the AMS home page. It is the burner's responsibility to check the applicable open burning information for their geographic area before ignition. Case-by-case meteorology or smoke support for individual projects is available on request from the Smoke Management Unit through the summer months. Fall burn season and the return to coordinated smoke analysis and restrictions in the AMS begins September 1st.