After the major colors were blocked in, I began to add the clouds.  I did this by drawing them in with a white pastel and then adding some purple, pinks and blues for the shadow.  I tried to maintain some clear white parts of the clouds without making them to choppy.  After I put in the colors I used a light blue pastel (the same color as the one I used to make the horizon lighter) and blended it so they appear light and airy.  I also made the back mountain lighter using a mixture of grays, blues and purples.   As for the water, I took a turquoise pastel and blended over the whole thing so that it looks smooth and "watery."