There is a great episode of 99 percent invisible about this.
> The Weather Company also leverages NOAA data
... in the USA. But one of its great advantages is the data it receives from tens of thousands of amateur weather reporting stations globally. The Wunderground forecast for our locality is hyper-localised and very accurate for that reason, particularly compared to the national Met Office forecast which applies to an airport 35 miles away, beside a lake and on the other side of mountains.
I had no idea Weather Channel had bought Weather Underground in 2012. https://en.m.wikipedia.org/wiki/Weather_Underground_(weather...
I remember fondly using their Wunder Radio app in the early iPhone years.
It's turtles all the way down[1]. The Weather Company also leverages NOAA data and is listed as such as a weather service provider on NOAA's site[2]. Although they ostensibly augment it with other sources and apply their own forecasting models to the data, they're still basically repackaging NOAA data in one form or another.
[1] https://en.wikiquote.org/wiki/Turtles_all_the_way_down
[2] https://www.ncdc.noaa.gov/success/weather-service-providers