Snowflake: AWS - US West (Oregon): INC0154019

Impact: criticalStatus: postmortemStarted 2026-03-21 06:38 UTCResolved 2026-03-21 07:12 UTC (34 min)5 updatesSource: stspg.io

Summary

Snowflake reported a critical outage in AWS - US West (Oregon), potentially preventing sign-ins, queries, and data management. The vendor reported onset at 05:31 UTC March 21, 2026; the archived duration was 34 min, with resolution at 2026-03-21 07:12 UTC after Snowflake implemented a fix and confirmed service restoration.

Machine-written from the archived incident (Sol). Check the timeline before relying on it.

Affected components: AWS - US West (Oregon) - Security and Privacy FeaturesSecurity and Privacy FeaturesAlerts and NotificationsAWS - US West (Oregon) - Alerts and NotificationsAI and MLAWS - US West (Oregon) - AI and MLApplicationsAWS - US West (Oregon) - ApplicationsAWS - US West (Oregon) - Developer ToolsDeveloper ToolsAWS - US West (Oregon) - Data Loading and UnloadingData Loading and UnloadingAWS - US West (Oregon) - Listings and CollaborationListings and CollaborationAWS - US West (Oregon) - Organization and Account ManagementOrganization and Account ManagementAWS - US West (Oregon) - Snowpark Container ServicesSnowpark Container ServicesAWS - US West (Oregon) - Databases, Tables, and ViewsDatabases, Tables, and ViewsAWS - US West (Oregon) - Virtual WarehousesVirtual WarehousesAWS - US West (Oregon) - Business ContinuityBusiness Continuity

Timeline of updates

investigating2026-03-21 06:02 UTC
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 multiple core Snowflake services and features. Affected users may be unable to sign in, execute queries, or manage data. Incident start time: 05:31 UTC March 21, 2026
identified2026-03-21 06:23 UTC
Current status: We've identified the source of the issue, and we're developing and implementing a fix to restore service. We'll provide another update within 30 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. ETA: An ETA is not yet available. We'll provide one as soon as possible. Incident start time: 05:31 UTC March 21, 2026
monitoring2026-03-21 06:38 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 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. Users would have encountered HTTP 404 or other similar errors. Incident start time: 05:27 UTC March 21, 2026 Incident end time: 06:18 UTC March 21, 2026 Preliminary root cause: The investigation determined that infrastructure responsible for high-level traffic routing and name resolution became degraded, which caused customers to encounter HTTP 404 errors when attempting to access or use certain Snowflake services.
resolved2026-03-21 07:12 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 or the Support page in Snowsight. 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. Users would have encountered HTTP 404 or other similar errors. Incident start time: 05:27 UTC March 21, 2026 Incident end time: 06:18 UTC March 21, 2026 Preliminary root cause: The investigation determined that infrastructure responsible for high-level traffic routing and name resolution became degraded, which caused customers to encounter HTTP 404 errors when attempting to access or use certain Snowflake services. A root cause analysis (RCA) document will be published within five business days.
postmortem2026-03-27 23:14 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/INC0154019](https://community.snowflake.com/s/article/INC0154019)

Rewindex changes for this incident

Critical incident: AWS - US West (Oregon): INC0154019 2026-03-21 06:38 UTC

Impact, status and times are the vendor’s own, as last archived. View on stspg.io (opens in new tab). Snowflake profile · Recent Snowflake incidents · Markdown · JSON