Due to a scheduled power outage in the data center for Aurora preparations, all ALCF production computing resources are expected to be unavailable from 15:45 UTC on Sunday July 18, 2021 (10:45 CDT 07/18) to 17:00 UTC on Wednesday July 21, 2021 (12:00 CDT 07/21). The ALCF accounts management website (https://accounts.alcf.anl.gov) will also be unavailable during this time. We will send an email as soon as the systems have been released back to production. Please contact support@alcf.anl.gov with any questions or concerns.