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LATEST NEWS UPDATES | IMD launches systems for probabilistic weather forecasting

IMD launches systems for probabilistic weather forecasting

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published Published on Jun 2, 2018   modified Modified on Jun 2, 2018
-The Indian Express

“The new system will tell us the probability of rainfall according to its intensity and volume. This will be colour coded for ease of interpretation,” said IMD Director General KJ Ramesh.

New Delhi: The India Met Department (IMD) on Friday launched two “very high resolution” Ensemble Prediction Systems, to generate ten-day probabilistic weather forecasts. In simple terms, the new systems in place can provide rainfall forecasts with probabilities allowing better lead time to prepare for extreme weather events. These systems also use a higher resolution 12 km grid scale, instead of the 23 km resolution that has been in use.

Ministry of Earth Sciences Secretary M. Rajeevan said that the systems in place are due to the acquisition of Rs 450 crore worth of high power computing systems. He also said that these systems will improve upon the existing deterministic forecasts that are prone to high margins of errors.

“We have been issuing deterministic forecast at the district level that has been useful for planning for agricultural purposes, so the next logical step is block level forecast,” he said. “When you go for very small spatial scale, when you want to issue forecast for heavy rainfall or extreme weather forecasts then a deterministic forecast can generate large errors. The ensemble prediction model is more useful for this purpose,” he added.

However, the IMD said that these particular systems are specifically for rainfall, though it can be tweaked to provide similar forecasts for thunderstorms, cold waves and weather events. “The new system will tell us the probability of rainfall according to its intensity and volume. This will be colour coded for ease of interpretation,” said IMD Director General KJ Ramesh.

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The Indian Express, 2 June, 2018, http://indianexpress.com/article/cities/delhi/imd-launches-systems-for-probabilistic-weather-forecasting-5200929/


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