Dynamically deform noise map

hey I'm trying to add wind that goes over water.
The idea is to take a noise map to apply to the position where bump maps get drawn.
so it ok when i just scroll the noise map, but i would like just a bit more of a dynamic feel to it, like the spots deforming while moving.
so i thought to add noise to the noise maps coordinates itself. It gives a nice result for some time but then gets a bit out of hand
any ideas on how to get more control over it?
this is the line for the noise map:

Code (CG):

1. noise = tex2D(_NoiseMap, i.bumpCoords*_NoiseFactor+saturate(noise.rgb*_Time.xyz)+_Time.x);

and this is the result: