Delhi: Meteorological Department releases new heat index for summer, know how is it calculated!

Posted by

Delhi: The Meteorological Department released a new heat index for Delhi. As per the information is not just a function of the temperature. The heat index calculation takes factors such as how people feel the effect of the weather, humidity and the presence of wind into consideration.

Factors that are considered

The heat index represents the perceived outdoor temperature experienced by individuals, serving as a gauge of discomfort. According to a Meteorological Department official, this index is determined by considering factors such as the day’s peak temperature, humidity levels, and wind patterns.

Readings from Monday to Wednesday

IMD started daily release of this reading on Monday. From Monday to Wednesday, the heat index reading was less than 40 degrees Celsius.

Heat index started as an experiment

“The heat index was introduced by IMD last year as an experiment. However, we recently started showing the heat index for Delhi in our bulletin,” the Times of India quoted Kuldeep Srivastava, scientist and head of the Regional Weather Forecasting Centre of the IMD.

What are yellow, orange and red alerts?

If the heat index falls within the range of 40-50 degrees celsius, a yellow alert will be issued. An ‘orange’ alert will be triggered when the heat index is between 50-60 degrees celsius, while a red alert will be announced if the index exceeds 60 degrees celsius. Last July, Union Minister of Earth Sciences, Kiren Rijiju, stated in a written response in the Rajya Sabha that the India Meteorological Department (IMD) had introduced the heat index as an experimental measure.

“The experimental heat index has been launched by IMD to provide general guidance for the regions where the apparent temperature/feel-like temperature is on the higher side causing discomfort to people. At present, heat index is derived using the heat index equation similar to what is used by National Weather Service, National Ogeanic and Atmospheric Administration (NOAA), USA. It provides guidance towards additional care to be taken by people to reduce discomfort,” he said in his reply.

This is how IMD defines heatwave?

According to IMD, a heatwave is characterised by maximum temperatures surpassing the normal by at least 4.5 degrees celsius, with the maximum temperature reaching a minimum of 40 degrees celsius. Additionally, if the maximum temperature exceeds 45 degrees Celsius, it also qualifies as a heatwave. A heatwave is categorised as ‘severe’ when the maximum temperature surpasses the normal by at least 6.5 degrees Celsius.

Click to rate this post!
[Total: 0 Average: 0]

Leave a Reply

Your email address will not be published. Required fields are marked *