If you're interested in learning more about the pirateweather data sources and process, you can check out this article which goes into great detail.

https://aws.amazon.com/blogs/publicsector/making-weather-for...

I'm relying on it in Canada now so I can certainly vouch for it in my area. We had a snowstorm and power outages during holidays and it was great to follow the graphs with regards to wind/gust and precipitations.