Does storm damage accumulate?

[AMF]

Does storm damage accumulate?

Example: there is a sector with two damaging storms. Each one does 100 damage.

I send a ship into it. Does that ship take 100 damage or 200 damage?

And, I think there is a chance that storms will not do damage. So, does that chance apply to all storms at once, or indiviudally. For example, in the above case, if there is a 50% chance that storm damage occurs, what are the odds that ship will take 100 or 200 or zero damage? Is each storm "rolled for" separately?

Thanks,

Alarik