This basin's season has a double peak: one in April and May, before the onset of the monsoon, and another in October and November, just after. This double peak occurs because powerful vertical wind shear in between the surface monsoonal low and upper tropospheric high during the monsoon season tears apart incipient cyclones. High shear explains why no cyclones can form in the Red Sea, which possesses the necessary depth, vorticity and surface temperatures year-round. Rarely do tropical cyclones that form elsewhere in this basin affect the Arabian Peninsula or Somalia; however, Cyclone Gonu caused heavy damage in Oman on the peninsula in 2007.