It needs some significant improvement for US based warnings as well. The warnings displayed are extremely inconsistent in severity as compared to NWS CAP, and often times the warnings / advisories / watches are completely missing in patches throughout the map. I double checked NWS CAP and they are indeed correctly being sent through there. Some of the watches and warnings are also duplicated for some reason on windy.
Compared to the watch area here:
This is the NWS CAP XML index for Georgia at the time: https://feen.us/m3r4q5m5mn3ofq25n8f8.txt
And an example CAP message for the tornado watch: https://feen.us/91tota6stvd3v0oqj4le.txt