Since the last few days pre-monsoon activities have increased over Karnataka. Until April 6, North interior Karnataka was rain surplus by 67% whereas, South interior Karnataka was deficient by 20%.
During the last 24 hours, intense rain and thundershower activities occurred over South interior Karnataka including Bengaluru. We expect now rain figures will improve for South interior Karnataka as well. Bengaluru recorded 30 mm of rain during the last 24 hours.
The monthly average for the month of April for Bengaluru is 41.5 mm. This is the highest 24 hours rainfall for the city after 2015. In fact, this is the fourth highest 24-hour rainfall in the last one decade. The all-time record for 24 hours rainfall for Bengaluru is 108.6 mm established on April 19th in 2001. Until now, the city has received 30 mm of rain.
We expect rain activities to continue over Bengaluru as well as South interior Karnataka today and tomorrow. Scattered light patchy rains may continue over North interior Karnataka during the next 24 to 48 hours.
At present, a north-south trough is persisting from South interior Karnataka to Vidarbha across north interior Karnataka. This is a semi-permanent feature in the pre-monsoon season. But sometimes the trough gets weaken and may oscillate east and west leading to shifting the rain belt to east and west. This will be instrumental in giving on and of range over many parts of Karnataka until the next 48 hours.