It depends - if you only need to shed 30lb (aka once you've reached your goal weight, you will have a BMI between 19-25), then your weight loss will probably decrease at the end, to maybe even less than 1lb a week, which is normal for many reasons: you are lighter so you've got less excess weight and your daily calorie requirements go down, your body is getting used to exercise etc.
I wouldn't go as low as 1300 calories - if you reach a plateau, you won't have the option of lowering your calories (it's not healthy). I'd say eat 1500+ at first - ideally, take your average amount of calories that you normally eat, and take off 400-500. I lost the first 15lb by eating close to 2000 cal a day (BMI of 27 so not even that much) and gradually lowered this number.
I wouldn't let a plateau or slow weight loss get you down at the end - just keep the following things in mind:
- as its been said, measure your body, and maybe have one item of clothing you try on every so often and see how you fit in it with time
- don't beat yourself up by daily weight fluctuations
- adjust your calorie requirements over time, and start higher than 1300 cal
- shake your workout routine every so often to "shock" your body into something new
- be patient; if you've been overweight for some time, don't expect all the weight to drop off like that
I honestly believe that a really common mistake is to "crash diet" and eat too little, which in the longrun backfires for many reasons that you will find listed in this forum.
Good luck!
