The Linked LWG determination doesn't really apply here, that's saying it's okay to source the opening hours of a restaurant A from their own website, then the opening hours of restaurant B from their own website and so forth. I agree that's fine, I do this sometimes too.

If someone collected and maintained a bunch of data into a database and published that it could still be covered by copyright or in some jurisdictions database rights, so we won't take that collection of data and add it to OSM. It doesn't matter if that is "factual" data it still can be copyrighted or at least the publisher claims it to be copyrighted until tested in the courts. We're not going to push those limits in OSM, if there's potential to be an issue we'll play it safe.

I think the question is then is taking selected data from http://www.bom.gov.au/australia/radar/info/nsw_info.shtml considered taking a collection of data (which we generally can't use) or considered a single data point (which we could use). I'm not sure, it's just that looking at the amount of data added in this changeset it certainly felt like mass-adding a whole collection of data.

I can see data about antenna polarisation, elevation, frequency, height, manufacturer, power rating, reference codes, start dates, tower type/construction and names.

I want to see this data in OSM, but I don't want to be testing the limits of copyright and risk the reputation of OSM and assurances we make about the data to downstream users.

The WMO site makes no mention of copyright, and therefore has full protection and isn't under an open license.