add disclaimer regarding support

README.md

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 Open-Meteo integrates weather models from well-known national weather services, delivering a rapid weather API. Real-time weather forecasts are unified within a time-series database that covers both historical and future weather data. Open-Meteo is designed to analyse long time-series of weather data any place on earth.
 
-The database, made available through the [AWS Open Data Sponsorship program](https://aws.amazon.com/opendata/open-data-sponsorship-program/).
+This database is made available through the [AWS Open Data Sponsorship program](https://aws.amazon.com/opendata/open-data-sponsorship-program/).
 
 Weather datasets are sourced from the following national weather services:
 - Forecast: NOAA NCEP, DWD, ECMWF, Environment Canada, MeteoFrance, JMA, BOM, CMA, Met Norway, DMI, KNMI
 - Historical data: Copernicus, ECMWF
 - Climate data: CMIPS 
 
+This open-data distribution is managed by Open-Meteo and is not directly affiliated with national weather services such as ECMWF or NOAA NCEP. Open-Meteo does not guarantee the accuracy, completeness, or uninterrupted provision of the data products, and they are provided without any warranty. For support inquiries, please contact Open-Meteo by creating [`issues`](https://github.com/open-meteo/open-data/issues) or [`discussions`](https://github.com/open-meteo/open-data/discussions) in this repository.
+
 ## Weather Models
 
 All available data can be explored using the [S3 explorer](https://openmeteo.s3.amazonaws.com/index.html#data/).