I had looked at noaa.gov briefly, one issue was the coverage outside the US, the other issue was looking at their samples, there was no wind, humidity and pressure information for the forecast days directly available - it may be available on with some specific queries or require extra queries, but I didn't see it right away. Just like google, nothing prevents us from making another weather plugin using noaa's data - it will just have less information than the current plugin (which for a lot of people should be fine).
