Even in a storm, you won't feel a thing on a big ship (over 300m) with stabilizers. And you have to understand that there is a difference between a storm which involves different mediums, like gas (atmosphere), liquid (sea) and sometimes solid maybe (the shore or some sea cliffs) and a storm which resides in one medium only. The Venusian equatorial winds which surround the planet in a few days (at 300-400 km/h) and which are pretty permanent, can be considered storm winds. Those plans with balloon deploying were designed especially to take advantage of such winds, in order to get shorter days.