September 24, Colombo (LNW): The Deep Depression over the West-central and adjoining Northwest Bay of Bengal is moving west-northwestwards and is currently crossing the North Andhra Pradesh and adjoining South Odisha coasts of India. Although this system will not have a direct impact on Sri Lanka, the prevailing rainy conditions in the southwestern part of the island are expected to continue due to the wind flow towards the system.
Showers or thundershowers will occur at times in the Western, Sabaragamuwa, Southern, Central and North-western Provinces. Heavy falls above 100 mm are likely at some places in the above areas.
A few showers will occur in North-central province and in Mannar district.
Strong winds of about (40-50) kmph can be expected at times over Western slopes of the Central hills, North-central and North-western provinces and in Trincomalee, Hambantota and Matale Districts.
The general public is kindly requested to take adequate precautions to minimise damage caused by temporary localised strong winds and lightning during thundershowers.
Marine Weather:
The Deep Depression over the west-central and adjoining northwest Bay of Bengal is currently located around 1,020 km northeast of Kankasanthurai. The system is very likely to move further west-northwestwards and is currently crossing the North Andhra Pradesh and adjoining South Odisha coasts of India.
Under the influence of this system, heavy thundershowers are expected over the sea areas of the Bay of Bengal, with winds occasionally increasing up to (70-80) kmph, and the sea conditions in these areas will become very rough.
Naval and fishing communities are warned not to venture to the sea areas in between 7°N and 22°N latitude and 82°E and 90°E longitude until further notice. Naval and fishing communities operating in those sea areas are advised to move away from the affected sea areas.
Naval and fishing communities engaging the activities over this sea areas are advised to be vigilant and be attentive to the future forecasts and bulletins issued by the department of meteorology in this regards.
Condition of Rain: Showers or thundershowers will occur at times in the sea areas off the coast extending from Kankasanthurai to Hambanthota via Puttalam, Colombo and Galle. Showers or thundershowers may occur at several places in the other sea areas during the evening or night.
Winds: Winds will be South-westerly. Wind speed will be (30-40) kmph.
Wind speed can increase up to (55-65) kmph at times in the sea areas off the coast extending from Trincomalee to Negombo via Kankasanthurai and Mannar and Puttalam, and from Galle to Pottuvil via Hambantota. Wind speed can increase up to 50 kmph at times in the other sea areas around the island.
State of Sea: The sea areas off the coast extending from Trincomalee to Negombo via Kankasanthurai and Mannar and Puttalam, and from Galle to Pottuvil via Hambantota will be rough or very rough at times. The naval and fishing communities who are engaged in fishing and naval activities in the above sea areas are requested to be vigilant in this regard.
The other sea areas around the island will be fairly rough at times.
The wave height may increase about (2.0 – 2.5) meters in the sea areas off the coast extending from Puttalam to Pottuvil via Colombo, Galle and Matara.
Temporarily strong gusty winds and very rough seas can be expected during thundershowers.