There is a significant acceleration zone on the west side of Cape Ommaney when the prevailing NW winds are blowing and winds strengths can suddenly increase by 10-15 knots in the space of half a mile as you approach the Cape from the NW.
Conversely the eastern side of Cape Ommaney can be mirror calm whilst it is blowing 25-30 knots a few hundred meters away on the other side of the Cape.
The transition zone between the 2 extremes is almost non existent and it is easy to get caught with too much sail up in this area.