# Snowflake: Critical incident: INC20000239

**Summary:** A critical Snowflake outage affected services in AWS - US West (Commercial Gov - Oregon) and AWS - US West (Oregon), starting 2026-09-27 02:15 UTC and resolving 2026-09-27 03:16 UTC (1 h 0 min). Snowflake attributed the impact to its third-party cloud platform and coordinated with that platform to implement a fix and confirm restoration. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-09-27 02:15 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/3c0vvgf9cdwx](https://stspg.io/3c0vvgf9cdwx)
- [Company: Snowflake](https://rewindex.com/company/snowflake.md)
- Versions: before (none: first archived) → after incident\_version:164/3ykqqwk3s758@6bbdb2185c83
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ INC20000239
```

**2. Added: Impact**

```diff
+ critical
```

**3. Added: Status**

```diff
+ postmortem
```

**4. Added: Start time**

```diff
+ 2026-09-27 02:15 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-09-27 03:16 UTC
```

**6. Added: Affected components**

```diff
+ Applications, AWS - US West (Commercial Gov - Oregon) - Applications, AWS - US West (Commercial Gov - Oregon) - Databases, Tables, and Views, AWS - US West (Commercial Gov - Oregon) - Data Loading and Unloading, AWS - US West (Commercial Gov - Oregon) - Virtual Warehouses, AWS - US West (Oregon) - Applications, AWS - US West (Oregon) - Databases, Tables, and Views, AWS - US West (Oregon) - Data Loading and Unloading, AWS - US West (Oregon) - Virtual Warehouses, Databases, Tables, and Views, Data Loading and Unloading, Virtual Warehouses
```

**7. Added: Update** (monitoring) · 2026-09-27 02:15 UTC

```diff
+ Current status: We identified an issue with our third-party cloud platform that caused impact to Snowflake services. We've coordinated with our third-party cloud platform to implement 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. Incident start time: 00:25 UTC September 27, 2026 Incident end time: 01:00 UTC September 27, 2026 Preliminary root cause: An issue with our third-party cloud platform caused impact to multiple Snowflake services and features. We have engaged with our third-party for further details.
```

**8. Added: Update** (resolved) · 2026-09-27 03:16 UTC

```diff
+ Current status: We've coordinated with our third-party cloud platform to implement the fix for this issue, and we've 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. Incident start time: 00:25 UTC September 27, 2026 Incident end time: 01:00 UTC September 27, 2026 Preliminary root cause: An issue with our third-party cloud platform caused impact to multiple Snowflake services and features. We have engaged with our third-party for further details. A root cause analysis (RCA) will be conducted and a summary will be made available within 10 business days.
```

**9. Added: Update** (postmortem) · 2026-10-09 09:55 UTC

```diff
+ 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/INC20000239](https://community.snowflake.com/s/article/INC20000239)
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-09-27 02:15 UTC | Critical incident: INC20000239 (this change) | outage |

All Snowflake changes: [timeline](https://rewindex.com/company/snowflake/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


---
Canonical: https://rewindex.com/change/i977b41f6ddf20d · Markdown: https://rewindex.com/change/i977b41f6ddf20d.md · JSON: https://rewindex.com/api/v1/changes/i977b41f6ddf20d · Generated 2026-10-18T01:54:04.871Z