Final Update: Wednesday, 13 November 2019 22:06 UTC
We've confirmed that all systems are back to normal with no customer impact as of 11/13, 21:25 UTC. Our logs show the incident started on 11/13, 20:25 UTC and that during the 1 hour that it took to resolve the issue subset of Log Analytics customers in West US 2 might have experienced failures in Log Search Alerts.
Root Cause: The failure was due to issue in one of the dependent services.
Incident Timeline: 1 Hour - 11/13, 20:25 UTC UTC through 11/13, 21:25 UTC
We understand that customers rely on Log Search Alerts as a critical service and apologize for any impact this incident caused.