Pre-monsoon activity likely to advance southwest monsoon
Visakhapatnam: The ongoing thunder showers might cause advancement of the southwest monsoon to Andhra Pradesh and other parts of the southern peninsula. The monsoon sets in over AP during the first week of June.
Private weather website Skymet said this spell could possibly be the pre-monsoon peak rainfall and it has viable linkages with the upcoming monsoon season.
The pre-monsoon rainfall, occurring from March to May, can influence the intensity and timing of the southwest monsoon. Early or heavy pre-monsoon rains can lead to increased soil moisture, potentially enhancing the subsequent monsoon rainfall.
Excess pre-monsoon rainfall warms up the troposphere, which presumably drives a stronger monsoon circulation. This, in turn, enhances monsoon rainfall over south and central India, the website said.
Multiple factors would increase the spread, intensity and duration of pre-monsoon weather activity. A persistent cyclonic circulation over Bangladesh and the adjoining northeast region will keep the pre-monsoon activity on for the entire week between May 1 and 8. This spell would become more intense between May 6 and 8.
The seasonal pre-monsoon Peninsular India trough is likely to become active. This feature would have a few bubbles of embedded cyclonic circulations. The weather activity would increase over the central and southern parts, covering Telangana and AP.
IMD Amaravati director S Stella said, “The increase in rainfall might reduce the number of heat wave days in Andhra Pradesh. There will be increased rainfall activity this month. The north Andhra region might have heavy rains on one or two occasions."
The Telangana IMD director K Nagaratna said the rainfall would not have any impact on the heat conditions. “We may experience more heat waves in north Telangana,’’ she told Deccan Chronicle.
Andhra Pradesh had experienced 21 heat wave days in 2023 and 27 in 2024, the highest in south India.
