alt Hacker News> for example, the US has stopped sharing weather data with canada.
Citation needed. Most weather data from NWS is required by treaty to be disseminated through WMO compliant methods. The Metsat data is transmitted unencrypted from the GOES sats. I don’t believe they even have the capability to encrypt it. It’s only DoD weather data that’s not being widely disseminated, AFAIK.
The Trump administration in February temporarily ordered NOAA to stop communicating with foreign nationals, which included Canadians and included sharing data.
I don't know if that is still in effect. Google "Did the US stop sharing weather data with Canada?" or ask your favorite LLM that provides references for its answers for more information.