City to receive heavy rain till Sunday

By Maqsood Maniyar | NT

Bengaluru: India Meteorological Department (IMD) has attributed recent heavy rainfall to a cyclonic circulation that originated over the Arabian Sea, among other reasons.

They said the trough extending from Vidarbha to Kerala and the convective summer showers and pre-monsoon conditions also played a role in the rainfall. Cyclonic circulations refer to the counterclockwise swirling motion of winds caused by low pressure areas, which results in rainfall.

According to IMD data, Bengaluru city limits received 114.6 mm of rain as of 8:30 am on Wednesday . The city will receive heavy rain till Sunday.

IMD scientist Geeta Agnihotri said IMD had been expecting heavy rains. “The cyclonic circulation was very intense. Yesterday, we had forecast heavy rainfall for all the districts of south interior Karnataka. The same has been realised,” she said. “Weather systems keep on changing their positions. Yesterday, it was over the Arabian Sea. Now it is over interior Tamil Nadu and its neighbourhood,” she added.

Agnihotri said that Karnataka could expect another spell of heavy rain.

The IMD scientist said that the cyclonic circulation over the Bay of Bengal was not a factor anymore. “The cyclonic circulation over the Bay of Bengal is no longer significant. It is no longer seen in fact. It has dissipated,” she added.

‘Trough adding to wet spell’
Agnihotri said there were other reasons for the torrential downpour as well.

“There was lots of trough extending from Vidarbha to Kerala,” she said.

“You can say it is a cumulative effect. They are pre-monsoon showers,” she added. Trough is a turning of the winds. When the winds are turning in a clockwise direction in a spatial scale, it essentially means that there is moisture incursion happening in that area.