Those would come from up here but i don't see any reason for that yet, But if a rex block appears, You can stick it where the sun don't shine...........
Were stuck in the middle of the battle ground, I would want to think in the end the colder dense air wins out but it would probably be more in line for sleet/zr up here with the warmer mid levels if that ends up being the case.
It could be a trend, That's a very strong HP up there, I saw that but wasn't going to post it, But that would be an icy/sleet look here with snow up north.