No.

Water flows from the area of greater water pressure to the area of lesser pressure. Under most normal circumstances, gravity makes sure that this is indeed downward, however, moving air, esp around a car at speed, can make for some very interesting flow patterns.

Also, water has mass, and is therefore subject to the laws of physics. It can, and will, be acted upon by things such as inertia and momentum. This may explain the upward flowing creek, I've seen stranger before...

MV