1. WH1081
2. Wunderground
3. I use cumulus software.
4. Make sure to emphasize that the data is not as trustworthy as official observations. And probably should do something to delete poor data or bugs.
5. Yes, of course.

I was taking a look and I noticed that there are official alerts in places like America, Asia and Europe. It would be great to have these here since a lot of people here use this app, and would help to reach the official information to them.

Weather service page: www.smn.gob.ar

I would really aprecciate if you could show the surface parcel trajectory.