I would guess there is less interference between a ground station and a satellite than between two ground stations. Two main reasons:
1) The storm would have to be right on top of the ground station to be in the line of sight when talking to a satellite. For the 3g case, the storm could be anywhere along the 15km between the two ground stations.
2) Storms typically cover a larger area horizontally than they do vertically, so for most angles, communicating with a satellite should go through less of the cloud than horizontal 3g communication. I'm sure there could be storms where this is not true (eg a tall thunderstorm directly above the ground station), but my guess is that such storms are more rare.
1) The storm would have to be right on top of the ground station to be in the line of sight when talking to a satellite. For the 3g case, the storm could be anywhere along the 15km between the two ground stations.
2) Storms typically cover a larger area horizontally than they do vertically, so for most angles, communicating with a satellite should go through less of the cloud than horizontal 3g communication. I'm sure there could be storms where this is not true (eg a tall thunderstorm directly above the ground station), but my guess is that such storms are more rare.