In the colour code used by the India Meteorological Department, which colour means take action?
- A.Green
- B.Yellow
- C.Orange
- D.Red
Correct answer
Explanation
The correct answer is D, red. The India Meteorological Department attaches a colour to the severity of the expected weather so that an administration can act without reading the whole bulletin. Red carries the instruction take action, which is the stage at which evacuation, closing of schools and suspension of fishing are ordered. Option A, green, means no warning, that is no severe weather is expected and nothing need be done. Option B, yellow, means be updated, a watch stage asking people to keep following the bulletins. Option C, orange, means be prepared, the stage at which shelters, boats and relief material are readied and travel is avoided. The colours run in the order green, yellow, orange and red as the danger rises, and they are used for heat waves, heavy rain and thunderstorms as well, not only for cyclones, which is why the sequence is worth memorising.
Read the full article: Cyclones: Naming, IMD Categories and Warning Stages
Practice Questions
View allA cyclone is known by different names in different parts of the world. In Philippines it is called as _______.
- A.willy-willy
- B.hurricane
- C.typhoon
- D.mango shower
Show answer
The Philippines lies in the western North Pacific, and every tropical cyclone of that basin, whether it strikes the Philippines, China or Japan, is called a typhoon.
Read the full explanation →What is the minimum sea surface temperature generally required for a tropical cyclone to form?
- A.About 16.5 degrees Celsius
- B.About 20 degrees Celsius
- C.About 26.5 degrees Celsius
- D.About 36.5 degrees Celsius
Show answer
A tropical cyclone runs on the latent heat released when water vapour condenses, so it needs a sea whose surface is at about 26.5 degrees Celsius or warmer, with that warm water reaching down about fifty metres, so that the churning of the sea does not cool the surface.
Read the full explanation →According to the India Meteorological Department, a system is classified as a super cyclonic storm when the sustained wind speed is at least
- A.118 km/h
- B.167 km/h
- C.222 km/h
- D.300 km/h
Show answer
The India Meteorological Department puts a system in the highest class, super cyclonic storm, when the sustained wind at its centre reaches 222 km/h, which is 120 knots.
Read the full explanation →In which year did the naming of tropical cyclones in the north Indian Ocean begin?
- A.1999
- B.2004
- C.2013
- D.2018
Show answer
The eight countries of the WMO and ESCAP Panel on Tropical Cyclones agreed on a list of names for this basin and began using them in 2004, long after the Atlantic, where naming had been practice for decades.
Read the full explanation →Which body names the tropical cyclones of the north Indian Ocean?
- A.The Regional Specialised Meteorological Centre, New Delhi
- B.The National Disaster Management Authority
- C.The Indian National Centre for Ocean Information Services
- D.The National Centre for Medium Range Weather Forecasting
Show answer
The names themselves are contributed by the thirteen member countries of the panel, but the centre at New Delhi, which the India Meteorological Department runs, takes the next name from the list, announces it when a deep depression strengthens into a cyclonic storm, and issues advisories to all the member…
Read the full explanation →