There are so many different types of morning light situations... here is at least a small number.
Painting from life would be much better but not as easy. Watercolor is a good way to sketch, but not very accurat when it comes to catching a "real" color. Oils would make the best solution though I dont have any experience with them. A really small laptop with a good monitor + a small tablet would be a solution... though an expensive one. ^^ Has anyone tried out an Nintendo Ds? I heard you can do some nice sketches with the painting programm.
I really like the flair and glow of this one
Some colored skies, shifted to yellow orange and red.
And the colder version