New Delhi: The India Meteorological Department on Thursday said that the southwest monsoon onset is likely to set over Kerala on June 6 with a model error of ± 4 days. Besides, the monsoon onset over the state is likely to be slightly delayed as per the statistical model forecast for the year, said IMD. The Met Department added, “Southwest monsoon sets over Kerala on June 1 with a standard deviation of about 7 days. The event marks the start of the rainy season over the region and as the monsoon progresses northward, relief from scorching summer temperatures is experienced over the areas.”

According to SkymetWeather private weather agency, the deficiency rate of rainfall over Kerala for pre-Monsoon season has peaked to 43 per cent till date. Kerala is receiving intermittent rainfall and thundershowers for many days recently, added the weather officials. “For the past 10 to 15 days the pre-Monsoon activities have been patchy in nature and were for short duration,” a report quoted the weathermen as saying.

The scattered showers over Kerala are due to a north-south trough that is extending from the eastern parts of the country to Comorin area across Tamil Nadu, said SkymetWeather. Experts suggest that these light to moderate rainfall accompanied by thunder is likely to continue in these regions but the intensity of rainfall will reduce over time. The weather department added that rainfall is expected to lash these regions on May 19 and 20.