Snowflake incident
Azure - Australia East (New South Wales): INC0147071
Snowflake experienced a critical incident on November 20, 2025 affecting Databases, Tables, and Views, lasting 2h 41m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Nov 20, 2025, 08:19 PM UTC
Current status: We're investigating an issue with Snowflake Data Cloud. We'll provide an update within 60 minutes. Customer experience: Customers hosted in the specified regions may be unable to access or use multiple core Snowflake services and features. Affected users may be unable to sign in, execute queries, or manage data. Incident start time: 19:50 UTC November 20, 2025
- investigating Nov 20, 2025, 09:13 PM UTC
Current status: We're continuing to investigate the issue with Snowflake Data Cloud. In the meantime, we recommend that affected customers using replication initiate their failover procedures. We'll provide another update within 60 minutes. Customer experience: Customers hosted in the specified regions may be unable to access or use multiple core Snowflake services and features. Affected users may be unable to sign in, execute queries, or manage data. Incident start time: 19:50 UTC November 20, 2025
- monitoring Nov 20, 2025, 10:15 PM UTC
Current status: We've implemented the fix for this issue, and we'll continue to monitor the environment until we're confident all services are functioning properly. Customer experience: Customers hosted in the specified regions may be unable to access or use multiple core Snowflake services and features. Affected users may be unable to sign in, execute queries, or manage data. Incident start time: 19:50 UTC November 20, 2025 Incident end time: 21:15 UTC November 20, 2025 Preliminary root cause: Our investigation identified that a recent configuration change to our firewall rules resulted in a communication issue between our Cloud Services and Storage layer infrastructure. As a result, customer requests were unable to be processed successfully.
- resolved Nov 20, 2025, 11:01 PM UTC
Current status: We've implemented the fix for this issue and monitored the environment to confirm that service was restored. If you experience additional issues or have questions, please open a support case via Snowflake Community. Customer experience: Customers hosted in the specified regions may have been unable to access or use multiple core Snowflake services and features. Affected users may have been unable to sign in, execute queries, or manage data. Incident start time: 19:50 UTC November 20, 2025 Incident end time: 21:15 UTC November 20, 2025 Preliminary root cause: Our investigation identified that a recent configuration change to our firewall rules resulted in a communication issue between our Cloud Services and Storage layer infrastructure. As a result, customer requests were unable to be processed successfully. A root cause analysis (RCA) document will be published within five business days.
- postmortem Dec 02, 2025, 10:33 PM UTC
Snowflake Engineering has completed the postmortem of this service incident. A detailed Root Cause Analysis \(RCA\) is available on the Snowflake Community site: [https://community.snowflake.com/s/article/INC0147071](https://community.snowflake.com/s/article/INC0147071)