cyclone that was formed in bay of bengal in may 2017
2017 North Indian Ocean cyclone season The season officially had an early start compared with the last two seasons, with the formation of Cyclone Maarutha over the Bay of Bengal in mid-April. Cyclone Mora, formed in late May over the Bay of Bengal. At its peak intensity, it was equivalent to a marginal Category 1 hurricane on the Saffir-Simpson hurricane wind scale. The cyclone produced severe flooding across Sri Lanka, India, Myanmar and Bangladesh and caused 15 deaths directly and 208 deaths indirectly. The floods persisted in Bangladesh since a Deep Depression over Bay of Bengal made landfall and killed 156 people in Bangladesh. A depression formed in northwestern Bay of Bengal and produced torrential rainfall. It was followed by a depression over Jharkhand which killed 70 people in West Bengal. Under the influence of strong monsoon surge a disturbance developed over Bay of Bengal travelled westwards and intensified to an unnamed depression. It also affected neighboring Karachi in Pakistan. A strong monsoon surge prevented formation of systems until a deep depression formed over West Bengal in October and caused heavy rainfall. A couple of depression formed between mid October and November which continued the rain spell causing destruction of life and property. Very Severe Cyclonic Storm Ockhi formed in early December and wreaked havoc in the countries where it impacted. It was equivalent to a strong Category 3 hurricane on the Saffir-Simpson scale at peak intensity. The twin storm of Ockhi was a deep depression which originated in Bay of Bengal while its counterpart was in Arabian Sea.
Tropical cyclone “Tropical” refers to the geographical origin of these systems, which form almost exclusively over tropical seas. “Cyclone” refers to their winds moving in a circle,[5] whirling round their central clear eye, with their winds blowing counterclockwise in the Northern Hemisphere and blowing clockwise in the Southern Hemisphere. The opposite direction of circulation is due to the Coriolis effect. Tropical cyclones typically form over large bodies of relatively warm water. They derive their energy through the evaporation of water from the ocean surface, which ultimately recondenses into clouds and rain when moist air rises and cools to saturation. This energy source differs from that of mid-latitude cyclonic storms, such as nor'easters and European windstorms, which are fueled primarily by horizontal temperature contrasts. Tropical cyclones are typically between 100 and 2,000 km (62 and 1,243 mi) in diameter.