Carry your raincoat and umbrella each time you step out in the next two days as the Indian Meteorological Department (IMD) has forecast rainfall and cloudy sky in Bengaluru and most parts of south interior Karnataka over the coming 48 hours.
This is because of a system formation in the Bay of Bengal which is common during May, before the arrival of southwest monsoon, said Geeta Agnihotri, director in-charge, IMD, Bengaluru.
There is a well-marked low-pressure area over the southwest Bay of Bengal and the adjoining Sri Lanka which has moved slightly north-westwards and now lies over Sri Lanka and the adjoining Gulf of Mannar and the southwest Bay of Bengal.
The system is likely to move north-northwestwards and concentrate into a depression over the next 48 hours, she said.
The temperature in the city has dipped because of the cloud cover.
The maximum and minimum temperatures on Monday were 30.6 and 23.8 degrees Celsius, respectively.
The maximum and minimum temperatures at HAL airport were 30.1 and 23 degrees Celsius, respectively, and at the international airport were 31.2 and 23.2 degrees Celsius, respectively.
The normal maximum and minimum temperatures are 33 and 21 degrees Celsius, respectively.
The southwest monsoon models suggest that the rainy season will hit the Kerala coast on June 7 (plus or minus four days), Agnihotri said.
This means the monsoon will arrive in Karnataka late, while the normal forecast date is June 5. The onset of monsoon in Karnataka will depend on its arrival in Kerala. “So, we have to wait and watch,” she said.
The formation of systems, however, will not have an impact on the arrival of monsoon. The IMD has forecast a normal monsoon this season.