Sri Lanka is experiencing a significant increase in rainfall, a pattern that began on May 6th and is now expected to persist for several days. This weather shift is primarily attributed to the influence of the Intertropical Convergence Zone (ITCZ) and an associated low-level atmospheric disturbance near the island.
Initially, the Department of Meteorology forecast rain and thundershowers predominantly after 1 PM daily. While this general timing holds, showers and thundershowers are now anticipated in most parts of the island throughout the day. Morning rain has also been observed and is expected in the Western, North-Western, Southern, and Northern provinces, as well as the Trincomalee district.
Cloudiness is expected to prevail over many areas, particularly in the Western, Sabaragamuwa, Central, Southern, Uva, and North Central provinces, and the Ampara district. Early morning fog may also occur in some locations within the Central, Sabaragamuwa, and Uva provinces.
A critical development in the weather system is the low-level atmospheric disturbance, which has been closely monitored since May 6th. It has now developed into a low-pressure zone by May 11th, with further potential for intensification within the next 36 hours.
Heavy rainfall exceeding 100 millimeters is forecast for several areas. The latest reports indicate these intense downpours are expected in some locations across the Western, Sabaragamuwa, Central, Uva, Southern, North-Western, Northern, and North Central provinces, as well as the Anuradhapura and Trincomalee districts. While earlier forecasts mentioned varying thresholds, the consistent and most recent warning is for rainfall exceeding 100mm in these regions. Rainfall exceeding 75mm and 50mm is also possible in other parts of the island.
Authorities have issued warnings for heavy rain, strong winds, and lightning. The public is strongly advised to take necessary precautions and stay updated on the latest weather forecasts from the Department of Meteorology.