Rwy 22 at Catalina slopes uphill (1.69%) for the first 2000ft. Temperature was ~5 degs above standard. I'm having a hard time picturing the specific effect of a 1.69% slope (not sure what that looks like), but it can't help.
Not sure if this will help, but this picture was taken back in 2003 by a relative of mine as we flew on the downwind to land there. Unfortunately my relative switched to the video camera on final, which had the still camera been used that vantage point would have provided a better idea of the slope, but you can get an idea from this side view: