You’ll be alreet.
I’ve flown to BWI a few times last year and you’ll route north of the jet stream toward Greenland.
The company will aim to avoid significant turbulence too when they plan the route, however sometimes you’ll hit the odd patch of rough air once in a while. The jets are tough and are designed to take a bit of a beating.
If we hit turbulence, we’ll slow down to smooth things out a bit and potentially change level to either get out of the rough air, or give us more lattitude with our critical speeds at lower levels.
Weather radar will pick up moisture which indicates likely turbulence that we can avoid, but can’t see clear air turbulence. The US pilots are OBSESSED with “ride reports” to the point of being annoying, but if it’s lumpy, you’ll get plenty (too much) feedback on the north atlantic common frequency 😣 so we’re well prepared!
Coming back, you’ll route further south to take advantage of the jet stream. I had a 170kt tailwind the other day heading to the middle east. Smooth as a smooth thing.
Crossing jetstreams sometimes is necessary and that can get a bit lumpy as you enter and exit the band of fast moving air; normally fine within.
Enjoy!