I dont want to say it's completely impossible, but it...pretty much is. Those are like, Biggest Loser numbers and they workout six hours a day, are morbidly obese and under doctor supervision. It's not realistic. At all. If you were significantly heavier and
drastically changed your way of eating and added a lot of intense exercise...you
might have a shot at 50lbs.
30lbs in three months would still be a challenging, but attainable goal. 1-2lbs a week is realistic for most people (some people do lose more naturally, but not because they're trying to starve themselves down to meet a goal). It's possible, even probable, that if you've never tried to lose weight before you'll drop a significant amount in the first month. I agree with what others have said. You need to find a program to follow. Not a crash diet, a program. Weight Watchers was really workable for me when I first tried it at 15. Counting calories is also a great option.
But 60lbs, seriously, you're setting yourself up for failure. Working out "intensely" for an hour a day is wonderful, and I don't mean to take that away from you, but it's not anything that's going to make you drop that weight really fast. I exercise consistently for an hour five or six days a week at a high intensity (which I track on my heart rate monitor). I'm lucky if I lose a pound a week.
Take it from someone who spent their entire high school experience trying to lose weight. When summer ends and you're not where you want to be you'll just feel awful about yourself. Set something realistic that you can attain and keep up throughout the school year and maybe try to meet your weight loss goal for prom and grad
. That would be a great goal. The last thing you want is to lose a bunch of weight and then not be able to keep it off for all those big events.
Please understand I'm not trying to discourage you. What you've been doing with your exercise and paying attention to what you're eating is great... but I've been there. I went on a "medically supervised" extremely low calorie diet that promised me I would lose all of my weight by start of my last year of high school. And guess what, I didn't. I didn't even lose 10lbs. I was starving all the time, I binged as soon as it was done and I gained back everything plus a ton more. I was at my highest weight for prom and didn't end up going because I couldn't bring myself to buy a dress.
Just...let your body do what it's going to do. Track your calories (and increase them gradually. 1000 just isn't enough for you), keep up all the exercise you've been doing and just see what happens with your weight.