Sign In
Learn bits
Ecology & Environment
Mahesh

28/09/22 06:12 AM IST

Hurricane Ian

In News 
  • Hurricane Ian strengthens as Cuba and Florida brace for impact.
Hurricanes 
  • Hurricanes are the biggest and most violent storms on the planet.
  • Tropical cyclones or hurricanes use warm, moist air as fuel, and therefore form over warm Equatorial water.
Mechanism 
  • When the warm, moist air rises upward from the surface of the ocean, it creates an area of low air pressure below.
  • When this happens, the air from the surrounding areas rushes to fill this place, eventually rising when it becomes warm and moist too.
  • An eye forms in the centre. It is the calmest part of the cyclone. Before the wind reaches the centre it gets warmed up and rises upwards.
  • When the warm air rises and cools off, the moisture forms clouds. This system of clouds and winds continues to grow and spin.
  • This disturbance is fuelled by the ocean’s heat and the water that evaporates from its surface.
  • Such storm systems rotate faster and faster.
  • Storms that form towards the north of the equator rotate counterclockwise, while those that form to the south spin clockwise because of the rotation of the Earth.
IMD four Codes 
  • Green (pre-cyclone watch): This code means that “all is well”, there is no likelihood of any adverse weather-related and there are no advisories issued.
  • Yellow (cyclone alert): The colour yellow signals authorities to “be aware” or on their guard, with the likelihood of severely bad weather that could last several days at a stretch, while also suggesting that the weather could take a turn for the worse and upset daily activities.
  • Orange (Cyclone warning): Meaning “Be prepared”, the IMD issues the orange alert as a warning for extremely bad weather, electricity blackouts and the possibility of communication disruptions, including road and rail closures.
  • Red (during or post-landfall outlook): The IMD issues the highest level of warning—indicating authorities should “take action”—only when it is guaranteed that bad weather is going to upend travel and power and pose a significant risk to life.
Source- Hindustan Times 

More Related Current Affairs View All

17 Sep

Reasons Behind the heavy rain in Uttarakhand, Himachal

'Dehradun and several other districts in Uttarakhand have experienced very heavy rainfall over the past few days, triggering landslides in multiple areas and causing rivers to swel

Read More

08 Sep

Rajasthan’s coaching centre Bill

'The Rajasthan Coaching Centres (Control and Regulation) Bill, 2025, is a significant piece of legislation passed by the Rajasthan Assembly to regulate and oversee the state's burg

Read More

28 Aug

IADT-1

'Recently, the Indian Space Research Organisation (ISRO) successfully carried out its first Integrated Air Drop Test (IADT-1), a crucial milestone in the preparation for the countr

Read More

India’s First Ai-Driven Magazine Generator

Generate Your Custom Current Affairs Magazine using our AI in just 3 steps