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After experiencing dry and warm weather for almost a week, Bengaluru is likely to receive fresh pre-monsoon rain later this week. Although a few areas in the city got light showers during the previous weekend, the rain was scattered and did not bring much relief from the increasing heat and humidity.
Bengaluru's Weather Over the Past Few Weeks
The dry spell came soon after the city witnessed one of the heaviest rainfall events of the season. On April 30, Bengaluru recorded around 111 mm of rain within 24 hours, leading to severe waterlogging and traffic problems in many parts of the city. After that heavy spell, rainfall activity reduced sharply.
Weather data shows that the Bengaluru city observatory received only 31 mm of rain during the first 13 days of May. Meanwhile, the HAL observatory recorded just 8.2 mm of rainfall compared to the normal monthly average of 110.4 mm. Due to this heavy rainfall shortage, temperatures have started rising again in Bengaluru and nearby regions.
Bengaluru Rain Alert from 15 May
However, weather forecasts now suggest that moderate to heavy rainfall may return between May 15 and May 17. Some isolated parts of the city could also receive light evening showers from tomorrow onwards, mainly during the late afternoon and night hours.
Reason behind this Intense Weather Change
Meteorologists state that the changing weather is connected to a low-pressure area over the Bay of Bengal. The system is becoming stronger while slowly moving away from the Indian coast. Even though it is shifting into the sea, its surrounding winds are still affecting weather conditions across southern India. At present, northeasterly winds are blowing along the South Andhra Pradesh coast, while northerly winds are moving across Coastal Karnataka and Kerala. These opposite wind patterns have created a wind discontinuity zone across parts of Karnataka, Rayalaseema, and interior Tamil Nadu.
At the same time, a seasonal trough stretching from Chhattisgarh through Vidarbha and Telangana is merging with this wind system. Together, these weather systems are likely to increase atmospheric instability over South Interior Karnataka, including Bengaluru, leading to better chances of rainfall in the coming days.