Amaravati, May 10 -- The Meteorological Centre here reported on Saturday that the Southwest Monsoon is very likely to advance into the South Andaman Sea, parts of the Southeast Bay of Bengal and the Nicobar Islands around May 13. In its daily weather bulletin, the centre also noted the persistence of a trough in the westerlies extending from East Uttar Pradesh to Southeast Telangana across East Madhya Pradesh and Vidarbha, between 9.4 km and 12.6 km above mean sea level. The north-south trough, which was earlier observed from North Interior Karnataka to the Gulf of Mannar, now extends from Marathwada to the Gulf of Mannar across Interior Karnataka and Tamil Nadu, up to 1.5 km above mean sea level. Under its influence, thunderstorms, accompa...