Vijayawada: TheIMD on Sunday forecast heavy rain and thunderstorms accompanied by lightning in parts of Andhra Pradesh from September 21 to 27. Strong winds with speeds of 40–50 kmph are expected at isolated places over NCAP & Yanam and SCAP, while Rayalaseema may witness winds of 30–40 kmph, the statement added. Similar conditions are expected on September 23 and 24, with heavy rain forecast at isolated places over NCAP and Yanam, and thundershowers across SCAP and Rayalaseema. On September 25, heavy rain is likely at isolated places over NCAP, Yanam and SCAP, along with thunderstorms over all regions, including Rayalaseema. The department further predicted heavy rain at isolated places across NCAP, Yanam, SCAP and Rayalaseema on September 26 and 27.