Thanks for writing to us,
I have studied your case with diligence.
You may need to do X ray
to see for any minor fracture
which was not visible ealier.
Yes cast can be taken off.
But you may not be able to do snowboarding immediately.
Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries.
Wishing you good health.