Good entry! I would only mention this:
С пacxoй! А какой прогноз погоды на выходные? -> Какой у вас прогноз погоды на выходные?
I think it's a little unnatural to use "A" here, though most of the speakers wouldn't notice it. We use "A" in the beginning of the sentence:
1) to introduce a new topic.
2) to show the difference between two things.
3) to ask a question back, to ask a question about a thing that you've just mentioned about yourself, F.E.:
С пасхой! У нас отличный прогноз погоды на выходные! А у вас?
С пасхой! Какой прогноз погоды на завтра в вашем городе? А на выходные?
or
A - С пасхой! Какой у вас прогноз погоды на выходные?
B - Хороший. А у вас?
In your example there's nothing to compare, and to start a question with "A" sounds like you say "By the way" - a little strange, because there was no previous topic. We can use it like that in spoken language to draw attention, like this:
- А ты не знаешь, где все ложки? Hey, do you know where all the spoons are?
But in your entry that's not the case too. :) Hope that's not too confusing.
Even more weather...
Well, I didn't manage to study any Russian yesterday but here's my efforts for today.
С пacxoй! А какой прогноз погоды на выходные у Вас? Нам oбещают солнечную погоду. К сожалению, У меня нет свободного времени. Я еду в Лондон.
All corrections and comments gratefully received!
Even more weather...
Well, I didn't manage to study any Russian yesterday but here's my efforts for today.
С Пacxoй! А какой прогноз погоды на выходные? Я думаю, oбещают солнечную погоду. К сожалению, у меня нет свободного времени. Я еду в Лондон.
All corrections and comments gratefully received!