For long-term protection you might consider planting some of whatever kind of vigorous landscape shrubbery grows well in your area outside the upwind side of the run.
At the top where you have the little holes is where you need to open up more venting -- the entire gable triangle, if possible (you may need to extend the roof or make an awning to keep rain from getting in.
If the 30's is the lowest your temperatures get, you could actually replace the entire...