We're talking about cutters, but as @BuffaloWeatherhas alluded to, it's very rare for storms to "cut" over the app. mountains. If the Low is on the EAST side of the mountains, our odds of a cutter are waaaaay lower. So, although there is nothing in Canada to stop a cutter, there is a chain of mountains that affects that...It's just been SO long (feels like 1990s) that we forget that part of the meteorology. A low on the West side of the Apps? That's a different story.