Categories Advisories Lightning Detection Alert System Under Construction Post author By Environmental Health & Safety Office Post date May 22, 2019 Latest Mason AlertNo Mason Alerts within the last 24 hours. To receive Mason Alerts on your mobile device, please register at alert.gmu.edu. A new lightning alert system is currently under construction. More information to come. ← Lightning Alert System Installed on West Campus, Testing May 23 → University Landline 911 Calls to be Transferred to Local County Police Agencies