After 100 or so games with urgot, you don't even need to see them anymore.
You just know where they are and where they will run, it's like shooting fish in a barrel.
and since you know if it hit by the sound effect, you know which direction they are and how far away by how long it took the q to get there
With practice you can tell which direction they are moving and how fast even with absolutely no vision on them.
And of course, if you landed that grenade, you just need to know the general area.