Changes / Snowflake / INC20000199
Snowflake: Critical incident: INC20000199
Summary
Snowflake reported a critical outage in AWS - Europe (Frankfurt): customers may have been unable to access or use services and features through Snowsight. It started at 2026-09-04 07:34 UTC and resolved at 2026-09-04 10:10 UTC, lasting 2 h 36 min. Snowflake restored service by rolling back an underlying infrastructure configuration update; a postmortem RCA is available on Snowflake Community.
Machine-written from the diff below (Sol; type: incident outage). Check the diff before relying on it.
What changed
Before: not present
After: INC20000199
Before: not present
After: critical
Before: not present
After: postmortem
Before: not present
After: 2026-09-04 07:34 UTC
Before: not present
After: 2026-09-04 10:10 UTC
Before: not present
After: Applications, AWS - Europe (Frankfurt) - Applications, AWS - Europe (Frankfurt) - Databases, Tables, and Views, AWS - Europe (Frankfurt) - Developer Tools, Databases, Tables, and Views, Developer Tools
Before: not present
After: Current status: We're investigating an issue with Snowflake Data Cloud. We'll provide an update within 30 minutes.
Customer experience: Customers hosted in the specified regions may be unable to access or use Snowflake services and features using Snowsight.
ETA: An ETA is not yet available. We'll provide one as soon as possible.
Workaround: There are currently no available workarounds for this issue.
Incident start time: 07:00 UTC September 04, 2026
Before: not present
After: Current status: We're continuing to investigate the issue with Snowflake Data Cloud. We'll provide another update within 30 minutes.
Customer experience: Customers hosted in the specified regions may be unable to access or use Snowflake services and features using Snowsight.
ETA: An ETA is not yet available. We'll provide one as soon as possible. In the meantime, we recommend that affected customers using replication initiate their failover procedures.
Workaround: There are currently no available workarounds for this issue.
Incident start time: 07:00 UTC September 04, 2026
Before: not present
After: Current status: We're continuing to actively investigate the issue with Snowflake Data Cloud. The specific focus at this time is on infrastructure components responsible for authorizing incoming traffic. We'll provide another update within 30 minutes.
Customer experience: Customers hosted in the specified regions may be unable to access or use Snowflake services and features using Snowsight.
ETA: An ETA is not yet available. We'll provide one as soon as possible. In the meantime, we recommend that affected customers using replication initiate their failover procedures.
Workaround: There are currently no available workarounds for this issue.
Incident start time: 07:00 UTC September 04, 2026
Before: not present
After: Current status: We've implemented the fix for this issue by rolling back a configuration update to the underlying infrastructure. Our telemetry and internal validations indicate that service has been restored. 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 have been unable to access or use Snowflake services and features using Snowsight.
Workaround: There were no available workarounds for this issue.
Incident start time: 07:00 UTC September 04, 2026
Incident end time: 08:30 UTC September 04, 2026
Preliminary root cause: A configuration update to infrastructure components responsible for authorizing incoming network traffic caused the components to restrict this traffic.
Before: not present
After: 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 or the Support page in Snowsight.
Customer experience: Customers hosted in the specified regions may have been unable to access or use Snowflake services and features using Snowsight.
Workaround: There were no available workarounds for this issue.
Incident start time: 07:00 UTC September 04, 2026
Incident end time: 08:30 UTC September 04, 2026
Preliminary root cause: A configuration update to infrastructure components responsible for authorizing incoming network traffic caused the components to restrict this traffic.
A root cause analysis (RCA) will be conducted and a summary will be made available within 5 business days.
Before: not present
After: 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/INC20000199](https://community.snowflake.com/s/article/INC20000199)
First version of this incident archived by Rewindex. View the live incident (opens in new tab).
History of this incident
| When (UTC) | Change | Kind |
|---|---|---|
| Critical incident: INC20000199 (this change) Snowflake reported a critical outage in AWS - Europe (Frankfurt): customers may have been unable to access or use services and features through Snowsight. It started at 2026-09-04 07:34 UTC and resolved at 2026-09-04 10:10 UTC, lasting 2 h 36 min. Snowflake restored service by rolling back an underlying infrastructure configuration update; a postmortem RCA is available on Snowflake Community. | Major incident |
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