Originally Posted by puttster
That's good, you only have to worry about hurricanes and not blizzards.
My first thought was you could install a bay window, but the view isn't that good. There are bay windows installed to hang from wires with no support underneath. The bay window at least proves that a solution can be engineered. Pre-built bay windows derive there strength through the use of plywood in properly engineered structures.
So the concern with your structure is designing and building it to support its own weight. It only has to support its own weight. Two ways to deal with weight, beef up the structure or reduce weight.
I broke your problem into 3 pieces: the hole (or door) in the wall, protection from weather above (rain), and protecting the opening from weather and critters.
The Hole: Your header design is good. Base the header size on the header used in your garage entrance. I would put a upwardly openning door in so you can seal it up in bad weather.
Top protection: build either a permanent, temporary or collapsable canvas awning. This is only required if you plan on leaving the car's butt sticking out for long periods of time. It needs to be able to at least funnel the runoff from the roof past your structure.
Protect the openning from weather and critters: Make a 5 sided retangular canvas box and mount in the openning. Use EMT conduit mounted to the wall to hold the shape of the box. Depending on the size of critters in your area use snaps or velcro to secure. You should also include a hole to run approve exhaust hose, so you don't get CO build up or accidentally burn the canvas from a spark.
Finally, paint an airplane on the side of the garage so people think its a plane sticking out not an old car.