It's possible, but don't kill yourself to make it happen. I started out at nearly 450 pounds, and even with super restrictive measures, most months my losses were about 15, and they've dropped to ten.
2 pounds a week puts you at 8 pounds a month which isn't shabby at all, but maybe all you need is a little extra walking or one less snack to get the extra quarter pound per week. Just make sure you feel good, are eating and moving enough, and don't live and die by the number on the scale.
I have come way too far to quit now!