The Meteorological Department has warned of a tropical storm, Mora, being caused by a deep depression over the Bay of Bengal which is intensifying with time. Conditions are still promising for Mora to further strengthen into a severe cyclonic storm during the next 12 hours.

The south-west monsoons are likely to advance into some parts of south-west Bay of Bengal, south-east Arabian Sea and east central Bay of Bengal.  Moving in the north­-northeast direction at a speed of 13 kmph, the system is presently centered at Latitude 17°N and Longitude 91.3°E, around 685 km south-east of Kolkata and 585 km ­southwest of Chittagong, Bangladesh and sub subsequently in Kerala, a weather forecast bulletin of the IMD said.

With the westerlies strengthening and the northward shift of the sheer zone, the conditions for further advance of the south-west monsoon have become favourable which would result in its setting over Kerala and parts of northeastern states around May 31, the IMD bulletin reported.

According to the IMD, as Mora moves further, it will start pounding most parts of Northeast India with modest to hefty rains on Monday. Rains will be escalating ominously causing heavy rainfall in parts of Assam, Manipur, Tripura, Nagaland and Meghalaya by May 30.

The deep depression over east central Bay of Bengal moved further northeastwards during past 06 hours with a speed of 18 kmph and lay centred at 1730 hours IST of Sunday over east-central Bay of Bengal near Latitude 15.7o N and Longitude 90.7oE, about 800 km nearly south--southeast of Kolkata and 740 km south--southwest of Chittagong.

The National Weather Forecasting Center of the IMD stated that thunderstorms accompanied by squally winds are very likely to raid parts of Bengal and conditions may prevail till May 30. Odisha may also witness heavy rains in the next 24 hours.

In the midst of this, sea conditions would vary from rough to severe along and off the Andaman Islands and West Bengal during the next 48 hours. Fishermen are advised not to venture into sea along and off the coast on May 29-30. Those out on sea are advised to return to the coast.

Severe heat wave conditions are observed at a few places in Rajasthan and isolated places near west Madhya Pradesh, Vidarbha, Delhi and Chandigarh.