Within the Indian Ocean north of the equator, tropical cyclones are tracked by the India Meteorological Department (IMD), which is the officially designated Regional Specialized Meteorological Center for the region. The American-based Joint Typhoon Warning Center (JTWC) also tracks storms in the basin on an unofficial basis. The Arabian Sea, which borders the Arabian Peninsula, typically spawns tropical cyclones in the southeastern portion of the body of water, offshore of western India. About 48.5% of cyclones dissipate without making landfall, or moving ashore, and around one in three storms move toward the Arabian Peninsula. However, storms do not form in the western Arabian Sea because of cool sea surface temperatures (the result of strong winds from the monsoon), as well as dry air from the Arabian Peninsula.