SiriusXM weather is not very useful, in my opinion. Sometimes it slowly gets the Environment Canada or NOAA forecasts. Sometimes they're current and for the correct area. Sometimes it'll show some of the important weather reporting stations.
So was that Raymarine, Garmin, or Furuno equipment?
Last setup I had up there was on the sailboat, older Raymarine (LHII), only went as far north as Cape Scott, and it worked as well as it did anywhere for me (whole length of the east coast from Newfoundland to Bahamas, west coast from Cape Scott to SF Bay). tpbradly says not too good on his Lowrance and Garmin.
So perhaps equipment makes a difference. If Raymarine has changed for the worse, I could save $800 I was about to spend to install on the trawler.