# NCAR x Amazon (NEXRAD Weather Data Cloud) revision history

Append-only Arc G field-change log. Forward-only honesty: events accrue from Arc G adoption.

Partnership: [NCAR x Amazon (NEXRAD Weather Data Cloud)](/partnerships/ncar-x-amazon-nexrad-weather-data-cloud.md)

## Recorded posture

- First recorded event: 2026-08-22
- Last material change: 2026-08-22
- Material event count: 1
- Editorial event count: 0

## Forward-only note

Arc G is forward-only. The event log accrues from the Arc G adoption point. Fields with no events post-baseline equal the current cached value and are not independently verified at any prior date.

_Canonical URL: /partnerships/ncar-x-amazon-nexrad-weather-data-cloud/history. REST: /v1/partnerships/70aa4e16-0275-4e7b-82c0-2bd2f3a11e7c/history. HTML: [/partnerships/ncar-x-amazon-nexrad-weather-data-cloud/history](/partnerships/ncar-x-amazon-nexrad-weather-data-cloud/history)._