The Radar Operations Center (ROC) will be performing software updates which will affect the data flow of the Level II Network TDS path. The activity is installing a software update on the National Level II (NL2) servers in Silver Spring, MD. Maintenance Window Date/Time: Start Date-Time: 05/18/2022 10:00 CDT (15:00 UTC) Stop Date-Time: 05/18/2022 12:00 CDT (17:00 UTC) Downtime: 15 minutes The data path via the ROC Distribution Server (RDS) in Norman, OK is not part of this activity. No service interruption via the RDS path is anticipated. Please keep BOTH NL2 connections (Silver Spring & Norman) up to avoid data flow interruption. If there is any emergency associated with Level II data flow noted during this event, I can be reached at (405) 820-3646 or address@hidden. Thank you, Michael Weeks Radar Operations Center/Software Engineering address@hidden 405-820-3646