- Disaster and disaster management
What to study?
- For Prelims: A brief overview of recent cyclones and their origins.
- For Mains: Classification and naming of cyclones.
Context: The India Meteorological Department (IMD) has sounded a yellow alert for the cyclone Pabuk. Cyclone Pabuk originated over the Gulf of Thailand and neighbourhood.
Four Stage Warning:
The cyclone warnings are issued to state government officials in four stages.
The First Stage warning known as “PRE CYCLONE WATCH” issued 72 hours in advance contains early warning about the development of a cyclonic disturbance in the north Indian Ocean, its likely intensification into a tropical cyclone and the coastal belt likely to experience adverse weather. This early warning bulletin is issued by the Director General of Meteorology himself and is addressed to the Cabinet Secretary and other senior officers of the Government of India including the Chief Secretaries of concerned maritime states.
The Second Stage warning known as “CYCLONE ALERT” is issued at least 48 hrs. in advance of the expected commencement of adverse weather over the coastal areas. It contains information on the location and intensity of the storm likely direction of its movement, intensification, coastal districts likely to experience adverse weather and advice to fishermen, general public, media and disaster managers. This is issued by the concerned ACWCs/CWCs and CWD at HQ.
The Third Stage warning known as “CYCLONE WARNING” issued at least 24 hours in advance of the expected commencement of adverse weather over the coastal areas. Landfall point is forecast at this stage. These warnings are issued by ACWCs/CWCs/and CWD at HQ at 3 hourly interval giving the latest position of cyclone and its intensity, likely point and time of landfall, associated heavy rainfall, strong wind and storm surge along with their impact and advice to general public, media, fishermen and disaster managers.
The Fourth Stage of warning known as “POST LANDFALL OUTLOOK” is issued by the concerned ACWCs/CWCs/and CWD at HQ at least 12 hours in advance of expected time of landfall. It gives likely direction of movement of the cyclone after its landfall and adverse weather likely to be experienced in the interior areas.
Different colour codes as mentioned below are being used since post monsoon season of 2006 the different stages of the cyclone warning bulletins as desired by the National Disaster Management.
- Cyclone Alert- Yellow.
- Cyclone Warning- Orange.
- Post landfall outlook- Red.
Sources: the hindu.