Highlights

Rainfall Prediction: During 15 – 21 Aug, high likelihood of heavy rainfall (100 – 150 mm) is predicted for the Sabaragamuwa, Western, Uva, Central and Southern provinces fairly heavy rainfall (50 – 100 mm) is predicted for the North Central, North Western and Eastern provinces; moderate rainfall (25-50 mm) is predicted for the Northen province. High likelihood of heavy rainfall (100 – 150 mm) is predicted for the Southwest corner of SL during 15-21 Aug.

Monitored Rainfall: On average, 6.6 mm was received in SL and rainfall was concentrated in the Western hills (9.6 mm) and Northern (7.7 mm) and Eastern (7 mm) plains for last 8 days. On average, 7.5 mm was received in the hydro catchments in SL; Neboda (Kalutara District) received the highest rainfall (65 mm) for last 8 days. Highest daily rainfall was in Mahailluppallama on 11 Aug (96.4 mm).

Monitored and Predicted Wind: From 7 Aug – 13 Aug, winds at 850mb (1.5km) were northwesterly, reaching up to15 m/s. From 16 Aug – 22 Aug, winds are predicted to be westerly and northwesterly, reaching up to 15 m/s.

Monitored Sea and Land Temperature: Average land surface temperature was 31.0ºC in the last week with warmera nomalies from seasonal average of 1-3 ºC. Northern plains was warmest followed by Eastern, Western and Southern plains. Sea surface temperature around Sri Lanka was normal to the North Eastern and some parts of the Northern side of the country and 1.5℃ above average for the other half of the country