> which are just passing you freely available NWS data
The Android weather widget gives more localized forecast data than the NWS web site which pretty much always locks you on to the local airport. Proximity to a great lake means that my local weather can be significantly different than the airport even though it's relatively near by. It all obviously comes from the NWS but they don't provide easy access to everything.
The NWS site may give measurements for the airport, but it'll give predictions for the much smaller area you select. It's the only site I've found I can trust for Yosemite Valley, for example, since I can have visual confirmation that it's actually talking about a narrowly defined area. Today, moving that patch of land around just slightly will show you forecasts that are 10 or 20 degrees cooler than El Cap meadow.
The Android weather widget gives more localized forecast data than the NWS web site which pretty much always locks you on to the local airport. Proximity to a great lake means that my local weather can be significantly different than the airport even though it's relatively near by. It all obviously comes from the NWS but they don't provide easy access to everything.