There had been an outage of Canadian radar data on the MRMS system since June 5, 2023 when Environment and Climate Change Canada (ECCC) adjusted their scanning strategies with their radar. An operational update to MRMS was completed on November 28, 2023 to adjust for the new scanning strategies in MRMS. All Canadian radars are now available in the MRMS product creation. Further information can be found in the NWS service change notice:

https://www.weather.gov/media/notification/pdf_2023_24/scn23-62_mrms_canadian_radar_aaa.pdf